./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/combinations/square_8+soft_float_1-2a.c.cil.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 be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:50:19,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:50:19,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:50:19,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:50:19,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:50:19,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:50:19,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:50:19,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:50:19,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:50:19,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:50:19,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:50:19,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:50:19,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:50:19,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:50:19,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:50:19,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:50:19,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:50:19,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:50:19,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:50:19,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:50:19,192 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:50:19,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:50:19,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:50:19,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:50:19,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:50:19,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:50:19,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:50:19,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:50:19,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:50:19,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:50:19,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:50:19,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:50:19,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:50:19,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:50:19,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:50:19,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:50:19,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:50:19,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:50:19,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:50:19,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:50:19,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:50:19,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:50:19,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:50:19,234 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:50:19,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:50:19,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:50:19,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:50:19,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:50:19,236 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:50:19,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:50:19,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:50:19,237 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:50:19,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:50:19,238 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:50:19,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:50:19,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:50:19,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:50:19,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:50:19,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:50:19,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:50:19,239 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:50:19,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:50:19,239 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:50:19,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:50:19,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:50:19,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:50:19,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:50:19,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:50:19,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:50:19,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:50:19,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:50:19,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:50:19,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:50:19,241 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:50:19,241 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:50:19,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:50:19,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2022-07-12 09:50:19,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:50:19,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:50:19,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:50:19,481 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:50:19,482 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:50:19,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-12 09:50:19,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4da0acf70/e5b2a8af0d2b4289a0e380ccc4f953c0/FLAGe26e7b129 [2022-07-12 09:50:19,844 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:50:19,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-12 09:50:19,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4da0acf70/e5b2a8af0d2b4289a0e380ccc4f953c0/FLAGe26e7b129 [2022-07-12 09:50:20,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4da0acf70/e5b2a8af0d2b4289a0e380ccc4f953c0 [2022-07-12 09:50:20,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:50:20,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:50:20,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:50:20,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:50:20,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:50:20,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d81e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20, skipping insertion in model container [2022-07-12 09:50:20,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:50:20,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:50:20,435 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/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-12 09:50:20,438 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/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-12 09:50:20,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:50:20,477 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:50:20,486 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/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-12 09:50:20,486 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/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-12 09:50:20,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:50:20,535 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:50:20,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20 WrapperNode [2022-07-12 09:50:20,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:50:20,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:50:20,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:50:20,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:50:20,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,571 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 235 [2022-07-12 09:50:20,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:50:20,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:50:20,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:50:20,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:50:20,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:50:20,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:50:20,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:50:20,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:50:20,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (1/1) ... [2022-07-12 09:50:20,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:50:20,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:50:20,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 09:50:20,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 09:50:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:50:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-12 09:50:20,736 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-12 09:50:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:50:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:50:20,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:50:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 09:50:20,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 09:50:20,788 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:50:20,789 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:50:21,091 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:50:21,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:50:21,102 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:50:21,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:50:21 BoogieIcfgContainer [2022-07-12 09:50:21,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:50:21,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:50:21,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:50:21,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:50:21,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:50:20" (1/3) ... [2022-07-12 09:50:21,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149bf7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:50:21, skipping insertion in model container [2022-07-12 09:50:21,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:20" (2/3) ... [2022-07-12 09:50:21,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149bf7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:50:21, skipping insertion in model container [2022-07-12 09:50:21,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:50:21" (3/3) ... [2022-07-12 09:50:21,112 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2022-07-12 09:50:21,122 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:50:21,123 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:50:21,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:50:21,184 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52e358d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4cd3fbdc [2022-07-12 09:50:21,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 09:50:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 106 states have internal predecessors, (174), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 09:50:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 09:50:21,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:50:21,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:50:21,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:50:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:50:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash -685161840, now seen corresponding path program 1 times [2022-07-12 09:50:21,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:50:21,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818073872] [2022-07-12 09:50:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:50:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:50:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:50:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:50:21,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:50:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818073872] [2022-07-12 09:50:21,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818073872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:50:21,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:50:21,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:50:21,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112869536] [2022-07-12 09:50:21,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:50:21,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 09:50:21,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:50:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 09:50:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:50:21,329 INFO L87 Difference]: Start difference. First operand has 115 states, 102 states have (on average 1.7058823529411764) internal successors, (174), 106 states have internal predecessors, (174), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:50:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:50:21,359 INFO L93 Difference]: Finished difference Result 225 states and 380 transitions. [2022-07-12 09:50:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 09:50:21,360 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 09:50:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:50:21,366 INFO L225 Difference]: With dead ends: 225 [2022-07-12 09:50:21,367 INFO L226 Difference]: Without dead ends: 108 [2022-07-12 09:50:21,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:50:21,373 INFO L413 NwaCegarLoop]: 169 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, 169 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:50:21,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:50:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-12 09:50:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-12 09:50:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.5104166666666667) internal successors, (145), 99 states have internal predecessors, (145), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 09:50:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2022-07-12 09:50:21,403 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 7 [2022-07-12 09:50:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:50:21,403 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2022-07-12 09:50:21,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:50:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2022-07-12 09:50:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 09:50:21,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:50:21,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:50:21,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:50:21,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:50:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:50:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash -685102258, now seen corresponding path program 1 times [2022-07-12 09:50:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:50:21,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847920372] [2022-07-12 09:50:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:50:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:50:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 09:50:21,422 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 09:50:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 09:50:21,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 09:50:21,455 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 09:50:21,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-12 09:50:21,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 09:50:21,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:50:21,461 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 09:50:21,464 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 09:50:21,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 09:50:21 BoogieIcfgContainer [2022-07-12 09:50:21,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 09:50:21,481 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 09:50:21,481 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 09:50:21,482 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 09:50:21,482 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:50:21" (3/4) ... [2022-07-12 09:50:21,484 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-12 09:50:21,484 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 09:50:21,485 INFO L158 Benchmark]: Toolchain (without parser) took 1213.09ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 64.0MB in the beginning and 72.2MB in the end (delta: -8.2MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2022-07-12 09:50:21,485 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory was 52.5MB in the beginning and 52.5MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 09:50:21,487 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.49ms. Allocated memory is still 96.5MB. Free memory was 63.8MB in the beginning and 66.4MB in the end (delta: -2.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 09:50:21,488 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.60ms. Allocated memory is still 96.5MB. Free memory was 66.4MB in the beginning and 64.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 09:50:21,490 INFO L158 Benchmark]: Boogie Preprocessor took 20.30ms. Allocated memory is still 96.5MB. Free memory was 64.0MB in the beginning and 62.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 09:50:21,490 INFO L158 Benchmark]: RCFGBuilder took 512.50ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 62.2MB in the beginning and 98.5MB in the end (delta: -36.3MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2022-07-12 09:50:21,490 INFO L158 Benchmark]: TraceAbstraction took 374.43ms. Allocated memory is still 127.9MB. Free memory was 97.9MB in the beginning and 72.2MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-07-12 09:50:21,491 INFO L158 Benchmark]: Witness Printer took 2.95ms. Allocated memory is still 127.9MB. Free memory is still 72.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 09:50:21,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory was 52.5MB in the beginning and 52.5MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.49ms. Allocated memory is still 96.5MB. Free memory was 63.8MB in the beginning and 66.4MB in the end (delta: -2.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.60ms. Allocated memory is still 96.5MB. Free memory was 66.4MB in the beginning and 64.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.30ms. Allocated memory is still 96.5MB. Free memory was 64.0MB in the beginning and 62.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 512.50ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 62.2MB in the beginning and 98.5MB in the end (delta: -36.3MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * TraceAbstraction took 374.43ms. Allocated memory is still 127.9MB. Free memory was 97.9MB in the beginning and 72.2MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 2.95ms. Allocated memory is still 127.9MB. Free memory is still 72.2MB. 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: 48]: 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 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 115 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 169 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 169 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2022-07-12 09:50:21,527 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/combinations/square_8+soft_float_1-2a.c.cil.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 be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:50:23,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:50:23,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:50:23,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:50:23,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:50:23,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:50:23,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:50:23,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:50:23,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:50:23,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:50:23,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:50:23,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:50:23,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:50:23,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:50:23,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:50:23,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:50:23,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:50:23,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:50:23,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:50:23,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:50:23,275 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:50:23,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:50:23,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:50:23,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:50:23,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:50:23,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:50:23,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:50:23,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:50:23,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:50:23,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:50:23,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:50:23,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:50:23,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:50:23,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:50:23,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:50:23,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:50:23,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:50:23,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:50:23,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:50:23,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:50:23,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:50:23,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:50:23,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-12 09:50:23,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:50:23,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:50:23,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:50:23,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:50:23,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:50:23,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:50:23,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:50:23,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:50:23,325 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:50:23,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:50:23,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:50:23,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:50:23,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:50:23,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:50:23,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:50:23,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:50:23,335 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 09:50:23,336 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 09:50:23,336 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 09:50:23,336 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:50:23,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:50:23,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:50:23,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:50:23,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:50:23,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:50:23,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:50:23,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:50:23,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:50:23,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:50:23,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:50:23,338 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 09:50:23,338 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 09:50:23,338 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:50:23,338 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:50:23,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:50:23,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 09:50:23,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be176f230c0ddf2a166ae209d5d0fb467abe0ece694096a2cf73b073fb0117ce [2022-07-12 09:50:23,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:50:23,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:50:23,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:50:23,591 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:50:23,592 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:50:23,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-12 09:50:23,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5a0a3df/3ba59c7dcbf94ac7ae58404229c335c5/FLAGe7b91fce3 [2022-07-12 09:50:23,949 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:50:23,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/square_8+soft_float_1-2a.c.cil.c [2022-07-12 09:50:23,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5a0a3df/3ba59c7dcbf94ac7ae58404229c335c5/FLAGe7b91fce3 [2022-07-12 09:50:24,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5a0a3df/3ba59c7dcbf94ac7ae58404229c335c5 [2022-07-12 09:50:24,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:50:24,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:50:24,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:50:24,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:50:24,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:50:24,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca1ee8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24, skipping insertion in model container [2022-07-12 09:50:24,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:50:24,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:50:24,488 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/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-12 09:50:24,492 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/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-12 09:50:24,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:50:24,572 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:50:24,595 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/combinations/square_8+soft_float_1-2a.c.cil.c[1995,2008] [2022-07-12 09:50:24,597 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/combinations/square_8+soft_float_1-2a.c.cil.c[2389,2402] [2022-07-12 09:50:24,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:50:24,622 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:50:24,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24 WrapperNode [2022-07-12 09:50:24,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:50:24,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:50:24,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:50:24,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:50:24,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,673 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2022-07-12 09:50:24,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:50:24,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:50:24,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:50:24,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:50:24,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:50:24,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:50:24,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:50:24,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:50:24,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (1/1) ... [2022-07-12 09:50:24,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:50:24,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:50:24,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 09:50:24,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 09:50:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:50:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 09:50:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-12 09:50:24,797 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-12 09:50:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:50:24,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:50:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 09:50:24,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 09:50:24,899 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:50:24,901 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:50:27,429 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:50:27,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:50:27,434 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:50:27,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:50:27 BoogieIcfgContainer [2022-07-12 09:50:27,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:50:27,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:50:27,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:50:27,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:50:27,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:50:24" (1/3) ... [2022-07-12 09:50:27,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fce7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:50:27, skipping insertion in model container [2022-07-12 09:50:27,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:50:24" (2/3) ... [2022-07-12 09:50:27,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fce7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:50:27, skipping insertion in model container [2022-07-12 09:50:27,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:50:27" (3/3) ... [2022-07-12 09:50:27,451 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-2a.c.cil.c [2022-07-12 09:50:27,461 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:50:27,462 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:50:27,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:50:27,506 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47bf7083, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@94fc4e8 [2022-07-12 09:50:27,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 09:50:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 09:50:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 09:50:27,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:50:27,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:50:27,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:50:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:50:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-07-12 09:50:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:50:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495359458] [2022-07-12 09:50:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:50:27,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:50:27,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:50:27,541 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) [2022-07-12 09:50:27,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 09:50:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:50:27,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-12 09:50:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:50:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:50:27,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:50:27,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:50:27,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495359458] [2022-07-12 09:50:27,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495359458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:50:27,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:50:27,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:50:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316145318] [2022-07-12 09:50:27,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:50:27,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 09:50:27,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:50:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 09:50:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:50:27,946 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:50:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:50:27,967 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2022-07-12 09:50:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 09:50:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 09:50:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:50:27,974 INFO L225 Difference]: With dead ends: 157 [2022-07-12 09:50:27,974 INFO L226 Difference]: Without dead ends: 74 [2022-07-12 09:50:27,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:50:27,978 INFO L413 NwaCegarLoop]: 116 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, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:50:27,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:50:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-12 09:50:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-12 09:50:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 09:50:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2022-07-12 09:50:28,005 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2022-07-12 09:50:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:50:28,006 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2022-07-12 09:50:28,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:50:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2022-07-12 09:50:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 09:50:28,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:50:28,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:50:28,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 09:50:28,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:50:28,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:50:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:50:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-07-12 09:50:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:50:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366963766] [2022-07-12 09:50:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:50:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:50:28,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:50:28,239 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) [2022-07-12 09:50:28,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 09:52:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 09:52:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:52:50,740 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-07-12 09:53:24,377 WARN L833 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from false [2022-07-12 09:53:26,456 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0)))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1))))) is different from true [2022-07-12 09:53:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:53:26,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:26,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:26,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366963766] [2022-07-12 09:53:26,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366963766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:26,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:26,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:53:26,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640089856] [2022-07-12 09:53:26,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:53:26,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:26,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:53:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-07-12 09:53:26,459 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:53:28,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 09:53:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:29,342 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2022-07-12 09:53:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 09:53:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 09:53:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:29,344 INFO L225 Difference]: With dead ends: 74 [2022-07-12 09:53:29,344 INFO L226 Difference]: Without dead ends: 69 [2022-07-12 09:53:29,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-07-12 09:53:29,345 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 103 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:29,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 274 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 209 Unchecked, 2.6s Time] [2022-07-12 09:53:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-12 09:53:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-12 09:53:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 09:53:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2022-07-12 09:53:29,353 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2022-07-12 09:53:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:29,354 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2022-07-12 09:53:29,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:53:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2022-07-12 09:53:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 09:53:29,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:29,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:29,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:29,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:29,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash -567365317, now seen corresponding path program 1 times [2022-07-12 09:53:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:29,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810603371] [2022-07-12 09:53:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:29,578 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) [2022-07-12 09:53:29,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 09:53:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 09:53:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:29,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:53:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:30,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:30,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810603371] [2022-07-12 09:53:30,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810603371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:53:30,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 09:53:30,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-12 09:53:30,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673753766] [2022-07-12 09:53:30,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 09:53:30,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:53:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:30,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:53:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:53:30,295 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:30,746 INFO L93 Difference]: Finished difference Result 162 states and 250 transitions. [2022-07-12 09:53:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:53:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-07-12 09:53:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:30,749 INFO L225 Difference]: With dead ends: 162 [2022-07-12 09:53:30,749 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 09:53:30,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:53:30,751 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 58 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:30,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 733 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 09:53:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 09:53:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2022-07-12 09:53:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 69 states have internal predecessors, (97), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-12 09:53:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 121 transitions. [2022-07-12 09:53:30,764 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 121 transitions. Word has length 33 [2022-07-12 09:53:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:30,765 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 121 transitions. [2022-07-12 09:53:30,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 121 transitions. [2022-07-12 09:53:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 09:53:30,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:30,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:30,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-12 09:53:30,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:30,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1463451301, now seen corresponding path program 1 times [2022-07-12 09:53:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738173513] [2022-07-12 09:53:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:30,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:30,983 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) [2022-07-12 09:53:30,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 09:53:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 09:53:31,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:31,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:53:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:31,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:31,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738173513] [2022-07-12 09:53:31,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738173513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:53:31,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 09:53:31,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-12 09:53:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279611982] [2022-07-12 09:53:31,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 09:53:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:53:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:53:31,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:53:31,642 INFO L87 Difference]: Start difference. First operand 81 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:32,210 INFO L93 Difference]: Finished difference Result 179 states and 273 transitions. [2022-07-12 09:53:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:53:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-12 09:53:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:32,212 INFO L225 Difference]: With dead ends: 179 [2022-07-12 09:53:32,212 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 09:53:32,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:53:32,213 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 56 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:32,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 456 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 09:53:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 09:53:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-07-12 09:53:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 105 states have internal predecessors, (148), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (22), 18 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-12 09:53:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2022-07-12 09:53:32,231 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 37 [2022-07-12 09:53:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:32,231 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2022-07-12 09:53:32,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2022-07-12 09:53:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 09:53:32,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:32,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:32,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:32,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:32,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:32,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1205285863, now seen corresponding path program 1 times [2022-07-12 09:53:32,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:32,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068276972] [2022-07-12 09:53:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:32,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:32,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:32,442 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) [2022-07-12 09:53:32,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 09:53:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 09:53:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:32,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:32,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068276972] [2022-07-12 09:53:32,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068276972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:32,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:32,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:53:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152705928] [2022-07-12 09:53:32,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:32,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:53:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:53:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:53:32,800 INFO L87 Difference]: Start difference. First operand 124 states and 186 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:33,343 INFO L93 Difference]: Finished difference Result 280 states and 423 transitions. [2022-07-12 09:53:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:53:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-12 09:53:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:33,345 INFO L225 Difference]: With dead ends: 280 [2022-07-12 09:53:33,345 INFO L226 Difference]: Without dead ends: 210 [2022-07-12 09:53:33,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:53:33,346 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 53 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:33,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 453 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 09:53:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-12 09:53:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2022-07-12 09:53:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 178 states have (on average 1.4157303370786516) internal successors, (252), 177 states have internal predecessors, (252), 24 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2022-07-12 09:53:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 306 transitions. [2022-07-12 09:53:33,369 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 306 transitions. Word has length 37 [2022-07-12 09:53:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:33,369 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 306 transitions. [2022-07-12 09:53:33,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 306 transitions. [2022-07-12 09:53:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 09:53:33,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:33,371 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:33,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:33,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:33,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:33,580 INFO L85 PathProgramCache]: Analyzing trace with hash -525227493, now seen corresponding path program 1 times [2022-07-12 09:53:33,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:33,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619471022] [2022-07-12 09:53:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:33,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:33,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:33,582 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) [2022-07-12 09:53:33,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 09:53:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 09:53:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:34,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:34,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:34,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619471022] [2022-07-12 09:53:34,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619471022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:34,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:34,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:53:34,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561076387] [2022-07-12 09:53:34,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:34,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:53:34,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:53:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:53:34,051 INFO L87 Difference]: Start difference. First operand 206 states and 306 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:34,829 INFO L93 Difference]: Finished difference Result 294 states and 440 transitions. [2022-07-12 09:53:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:53:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-12 09:53:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:34,831 INFO L225 Difference]: With dead ends: 294 [2022-07-12 09:53:34,831 INFO L226 Difference]: Without dead ends: 230 [2022-07-12 09:53:34,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:53:34,832 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:34,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 539 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 09:53:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-12 09:53:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-07-12 09:53:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 164 states have (on average 1.3902439024390243) internal successors, (228), 163 states have internal predecessors, (228), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-07-12 09:53:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 274 transitions. [2022-07-12 09:53:34,857 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 274 transitions. Word has length 37 [2022-07-12 09:53:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:34,858 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 274 transitions. [2022-07-12 09:53:34,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 274 transitions. [2022-07-12 09:53:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 09:53:34,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:34,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:34,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:35,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:35,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1910499068, now seen corresponding path program 1 times [2022-07-12 09:53:35,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138140307] [2022-07-12 09:53:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:35,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:35,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:35,072 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) [2022-07-12 09:53:35,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 09:53:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:35,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 09:53:35,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:35,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:53:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:36,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138140307] [2022-07-12 09:53:36,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138140307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:53:36,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 09:53:36,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 09:53:36,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873996018] [2022-07-12 09:53:36,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 09:53:36,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:53:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:53:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:53:36,091 INFO L87 Difference]: Start difference. First operand 188 states and 274 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:37,211 INFO L93 Difference]: Finished difference Result 276 states and 410 transitions. [2022-07-12 09:53:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 09:53:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-12 09:53:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:37,213 INFO L225 Difference]: With dead ends: 276 [2022-07-12 09:53:37,213 INFO L226 Difference]: Without dead ends: 238 [2022-07-12 09:53:37,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-12 09:53:37,214 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 197 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:37,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 645 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 09:53:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-12 09:53:37,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 179. [2022-07-12 09:53:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 157 states have (on average 1.3821656050955413) internal successors, (217), 156 states have internal predecessors, (217), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-12 09:53:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 259 transitions. [2022-07-12 09:53:37,232 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 259 transitions. Word has length 41 [2022-07-12 09:53:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:37,234 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 259 transitions. [2022-07-12 09:53:37,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 259 transitions. [2022-07-12 09:53:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 09:53:37,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:37,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:37,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:37,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:37,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1938435092, now seen corresponding path program 1 times [2022-07-12 09:53:37,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:37,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619502748] [2022-07-12 09:53:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:37,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:37,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:37,448 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) [2022-07-12 09:53:37,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 09:53:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:37,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 09:53:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:37,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:37,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:37,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619502748] [2022-07-12 09:53:37,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619502748] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:37,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:37,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:53:37,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332012866] [2022-07-12 09:53:37,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:37,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:53:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:53:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:53:37,733 INFO L87 Difference]: Start difference. First operand 179 states and 259 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:37,878 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-07-12 09:53:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 09:53:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-07-12 09:53:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:37,880 INFO L225 Difference]: With dead ends: 332 [2022-07-12 09:53:37,880 INFO L226 Difference]: Without dead ends: 266 [2022-07-12 09:53:37,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:37,881 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:37,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 328 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:53:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-12 09:53:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2022-07-12 09:53:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 210 states have (on average 1.3428571428571427) internal successors, (282), 209 states have internal predecessors, (282), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-07-12 09:53:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 328 transitions. [2022-07-12 09:53:37,897 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 328 transitions. Word has length 44 [2022-07-12 09:53:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:37,897 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 328 transitions. [2022-07-12 09:53:37,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 328 transitions. [2022-07-12 09:53:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 09:53:37,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:37,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:37,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:38,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:38,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:38,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1309251479, now seen corresponding path program 1 times [2022-07-12 09:53:38,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:38,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930146850] [2022-07-12 09:53:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:38,104 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) [2022-07-12 09:53:38,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 09:53:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 09:53:38,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:53:38,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:38,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930146850] [2022-07-12 09:53:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930146850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:38,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:38,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:53:38,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502425208] [2022-07-12 09:53:38,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:38,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:53:38,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:53:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:53:38,317 INFO L87 Difference]: Start difference. First operand 234 states and 328 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:38,652 INFO L93 Difference]: Finished difference Result 409 states and 570 transitions. [2022-07-12 09:53:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 09:53:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-07-12 09:53:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:38,654 INFO L225 Difference]: With dead ends: 409 [2022-07-12 09:53:38,654 INFO L226 Difference]: Without dead ends: 179 [2022-07-12 09:53:38,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:38,655 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:38,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 09:53:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-12 09:53:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2022-07-12 09:53:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 151 states have internal predecessors, (194), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-12 09:53:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2022-07-12 09:53:38,663 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 44 [2022-07-12 09:53:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:38,663 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2022-07-12 09:53:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2022-07-12 09:53:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 09:53:38,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:38,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:38,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:38,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:38,873 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:38,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1643290396, now seen corresponding path program 1 times [2022-07-12 09:53:38,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:38,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559233306] [2022-07-12 09:53:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:38,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:38,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:38,875 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) [2022-07-12 09:53:38,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 09:53:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 09:53:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:39,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:53:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:40,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:40,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559233306] [2022-07-12 09:53:40,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559233306] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 09:53:40,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 09:53:40,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-12 09:53:40,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664427164] [2022-07-12 09:53:40,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:40,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:53:40,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:53:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-12 09:53:40,686 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:42,766 INFO L93 Difference]: Finished difference Result 317 states and 456 transitions. [2022-07-12 09:53:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:53:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-12 09:53:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:42,768 INFO L225 Difference]: With dead ends: 317 [2022-07-12 09:53:42,768 INFO L226 Difference]: Without dead ends: 281 [2022-07-12 09:53:42,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-12 09:53:42,769 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 188 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:42,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 511 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 09:53:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-07-12 09:53:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 205. [2022-07-12 09:53:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.2950819672131149) internal successors, (237), 186 states have internal predecessors, (237), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-12 09:53:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 276 transitions. [2022-07-12 09:53:42,778 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 276 transitions. Word has length 45 [2022-07-12 09:53:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:42,779 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 276 transitions. [2022-07-12 09:53:42,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 276 transitions. [2022-07-12 09:53:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 09:53:42,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:42,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:42,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:42,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:42,988 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash -876669538, now seen corresponding path program 1 times [2022-07-12 09:53:42,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:42,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459802716] [2022-07-12 09:53:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:42,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:42,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:42,991 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) [2022-07-12 09:53:42,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 09:53:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:43,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 09:53:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:43,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:43,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:43,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459802716] [2022-07-12 09:53:43,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459802716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:43,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:43,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:53:43,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222085224] [2022-07-12 09:53:43,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:53:43,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:53:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:43,205 INFO L87 Difference]: Start difference. First operand 205 states and 276 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:43,385 INFO L93 Difference]: Finished difference Result 212 states and 282 transitions. [2022-07-12 09:53:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 09:53:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-12 09:53:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:43,387 INFO L225 Difference]: With dead ends: 212 [2022-07-12 09:53:43,387 INFO L226 Difference]: Without dead ends: 205 [2022-07-12 09:53:43,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:53:43,388 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:43,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 381 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:53:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-12 09:53:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-07-12 09:53:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-12 09:53:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2022-07-12 09:53:43,397 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 45 [2022-07-12 09:53:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:43,397 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2022-07-12 09:53:43,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2022-07-12 09:53:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 09:53:43,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:43,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:43,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-12 09:53:43,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:43,606 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:43,606 INFO L85 PathProgramCache]: Analyzing trace with hash 457064955, now seen corresponding path program 1 times [2022-07-12 09:53:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:43,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639274621] [2022-07-12 09:53:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:43,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:43,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:43,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:43,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 09:53:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 09:53:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:53:44,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:44,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639274621] [2022-07-12 09:53:44,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639274621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:44,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:44,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:53:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432521533] [2022-07-12 09:53:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:44,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:53:44,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:53:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:53:44,123 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:44,526 INFO L93 Difference]: Finished difference Result 248 states and 334 transitions. [2022-07-12 09:53:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:53:44,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-12 09:53:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:44,528 INFO L225 Difference]: With dead ends: 248 [2022-07-12 09:53:44,528 INFO L226 Difference]: Without dead ends: 246 [2022-07-12 09:53:44,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:53:44,529 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 38 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:44,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 596 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-07-12 09:53:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-12 09:53:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2022-07-12 09:53:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 186 states have (on average 1.2741935483870968) internal successors, (237), 189 states have internal predecessors, (237), 17 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-12 09:53:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 276 transitions. [2022-07-12 09:53:44,539 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 276 transitions. Word has length 45 [2022-07-12 09:53:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:44,540 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 276 transitions. [2022-07-12 09:53:44,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 276 transitions. [2022-07-12 09:53:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 09:53:44,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:44,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:44,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:44,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:44,753 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:44,753 INFO L85 PathProgramCache]: Analyzing trace with hash 514323257, now seen corresponding path program 1 times [2022-07-12 09:53:44,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:44,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350997552] [2022-07-12 09:53:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:44,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:44,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:44,756 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:44,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 09:53:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 09:53:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:53:45,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:45,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350997552] [2022-07-12 09:53:45,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350997552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:45,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:45,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:53:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347004259] [2022-07-12 09:53:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:45,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:53:45,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:45,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:53:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:53:45,208 INFO L87 Difference]: Start difference. First operand 209 states and 276 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:45,543 INFO L93 Difference]: Finished difference Result 262 states and 350 transitions. [2022-07-12 09:53:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:53:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-12 09:53:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:45,544 INFO L225 Difference]: With dead ends: 262 [2022-07-12 09:53:45,544 INFO L226 Difference]: Without dead ends: 260 [2022-07-12 09:53:45,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:53:45,545 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:45,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 469 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-07-12 09:53:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-12 09:53:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 213. [2022-07-12 09:53:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 189 states have (on average 1.2698412698412698) internal successors, (240), 192 states have internal predecessors, (240), 17 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (22), 19 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-12 09:53:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2022-07-12 09:53:45,554 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 45 [2022-07-12 09:53:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:45,554 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2022-07-12 09:53:45,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2022-07-12 09:53:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 09:53:45,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:45,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:45,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-12 09:53:45,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:45,763 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1895517033, now seen corresponding path program 1 times [2022-07-12 09:53:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:45,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277907055] [2022-07-12 09:53:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:45,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:45,765 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:45,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 09:53:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 09:53:45,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:45,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:45,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277907055] [2022-07-12 09:53:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277907055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:45,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:45,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:53:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022978687] [2022-07-12 09:53:45,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:53:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:53:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:53:45,976 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:46,128 INFO L93 Difference]: Finished difference Result 352 states and 474 transitions. [2022-07-12 09:53:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 09:53:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-07-12 09:53:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:46,130 INFO L225 Difference]: With dead ends: 352 [2022-07-12 09:53:46,130 INFO L226 Difference]: Without dead ends: 300 [2022-07-12 09:53:46,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:46,130 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 77 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:46,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 315 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:53:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-12 09:53:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2022-07-12 09:53:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 207 states have (on average 1.2753623188405796) internal successors, (264), 209 states have internal predecessors, (264), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-12 09:53:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 305 transitions. [2022-07-12 09:53:46,140 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 305 transitions. Word has length 46 [2022-07-12 09:53:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:46,140 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 305 transitions. [2022-07-12 09:53:46,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 305 transitions. [2022-07-12 09:53:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 09:53:46,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:46,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:46,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-12 09:53:46,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:46,349 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1657751029, now seen corresponding path program 1 times [2022-07-12 09:53:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:46,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188174744] [2022-07-12 09:53:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:46,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:46,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:46,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:46,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 09:53:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 09:53:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:46,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:46,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:46,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188174744] [2022-07-12 09:53:46,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188174744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:46,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:46,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:53:46,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408905908] [2022-07-12 09:53:46,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:46,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:53:46,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:53:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:53:46,525 INFO L87 Difference]: Start difference. First operand 232 states and 305 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:46,632 INFO L93 Difference]: Finished difference Result 247 states and 321 transitions. [2022-07-12 09:53:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 09:53:46,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-12 09:53:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:46,638 INFO L225 Difference]: With dead ends: 247 [2022-07-12 09:53:46,638 INFO L226 Difference]: Without dead ends: 208 [2022-07-12 09:53:46,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:46,640 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:46,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:53:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-12 09:53:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-07-12 09:53:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.289617486338798) internal successors, (236), 186 states have internal predecessors, (236), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-12 09:53:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2022-07-12 09:53:46,650 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 49 [2022-07-12 09:53:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:46,651 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2022-07-12 09:53:46,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2022-07-12 09:53:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 09:53:46,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:46,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:46,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-12 09:53:46,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:46,860 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1176937396, now seen corresponding path program 1 times [2022-07-12 09:53:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952192587] [2022-07-12 09:53:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:46,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:46,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:46,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 09:53:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 09:53:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:53:47,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:47,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:47,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952192587] [2022-07-12 09:53:47,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952192587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:47,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:47,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:53:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764287321] [2022-07-12 09:53:47,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:53:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:53:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:47,113 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:47,694 INFO L93 Difference]: Finished difference Result 335 states and 446 transitions. [2022-07-12 09:53:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:53:47,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-12 09:53:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:47,696 INFO L225 Difference]: With dead ends: 335 [2022-07-12 09:53:47,696 INFO L226 Difference]: Without dead ends: 293 [2022-07-12 09:53:47,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:53:47,697 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 216 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:47,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 405 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 09:53:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-12 09:53:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 208. [2022-07-12 09:53:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.278688524590164) internal successors, (234), 186 states have internal predecessors, (234), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-12 09:53:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 273 transitions. [2022-07-12 09:53:47,706 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 273 transitions. Word has length 50 [2022-07-12 09:53:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:47,707 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 273 transitions. [2022-07-12 09:53:47,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 273 transitions. [2022-07-12 09:53:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 09:53:47,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:47,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:47,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-12 09:53:47,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:47,916 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash -475872818, now seen corresponding path program 1 times [2022-07-12 09:53:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544024898] [2022-07-12 09:53:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:47,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:47,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:47,933 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:47,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 09:53:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:47,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 09:53:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:53:48,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:48,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:48,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544024898] [2022-07-12 09:53:48,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544024898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:48,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:48,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:53:48,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225843470] [2022-07-12 09:53:48,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:48,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:53:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:53:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:53:48,111 INFO L87 Difference]: Start difference. First operand 208 states and 273 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:48,428 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2022-07-12 09:53:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 09:53:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-12 09:53:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:48,430 INFO L225 Difference]: With dead ends: 326 [2022-07-12 09:53:48,430 INFO L226 Difference]: Without dead ends: 295 [2022-07-12 09:53:48,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:48,430 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 113 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:48,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 261 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 09:53:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-12 09:53:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 212. [2022-07-12 09:53:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 187 states have (on average 1.2727272727272727) internal successors, (238), 190 states have internal predecessors, (238), 18 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2022-07-12 09:53:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 277 transitions. [2022-07-12 09:53:48,439 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 277 transitions. Word has length 50 [2022-07-12 09:53:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:48,439 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 277 transitions. [2022-07-12 09:53:48,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 277 transitions. [2022-07-12 09:53:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 09:53:48,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:48,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:48,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-12 09:53:48,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:48,647 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:48,647 INFO L85 PathProgramCache]: Analyzing trace with hash 33068664, now seen corresponding path program 1 times [2022-07-12 09:53:48,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632260692] [2022-07-12 09:53:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:48,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:48,649 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:48,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 09:53:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:48,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 09:53:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:49,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:49,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:49,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632260692] [2022-07-12 09:53:49,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632260692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:49,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:49,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 09:53:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106759201] [2022-07-12 09:53:49,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:53:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:53:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:53:49,106 INFO L87 Difference]: Start difference. First operand 212 states and 277 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:50,868 INFO L93 Difference]: Finished difference Result 328 states and 444 transitions. [2022-07-12 09:53:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 09:53:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-12 09:53:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:50,870 INFO L225 Difference]: With dead ends: 328 [2022-07-12 09:53:50,870 INFO L226 Difference]: Without dead ends: 304 [2022-07-12 09:53:50,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:53:50,871 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 180 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:50,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 578 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-12 09:53:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-12 09:53:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2022-07-12 09:53:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.268181818181818) internal successors, (279), 224 states have internal predecessors, (279), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-12 09:53:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 326 transitions. [2022-07-12 09:53:50,881 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 326 transitions. Word has length 51 [2022-07-12 09:53:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:50,881 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 326 transitions. [2022-07-12 09:53:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 326 transitions. [2022-07-12 09:53:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 09:53:50,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:50,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:50,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:51,083 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2004133062, now seen corresponding path program 1 times [2022-07-12 09:53:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:51,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206012270] [2022-07-12 09:53:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:51,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:51,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:51,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 09:53:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 09:53:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:51,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:51,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206012270] [2022-07-12 09:53:51,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206012270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:51,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:51,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:53:51,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463196480] [2022-07-12 09:53:51,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:51,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:53:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:53:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:53:51,359 INFO L87 Difference]: Start difference. First operand 249 states and 326 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:51,492 INFO L93 Difference]: Finished difference Result 302 states and 390 transitions. [2022-07-12 09:53:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 09:53:51,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-12 09:53:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:51,494 INFO L225 Difference]: With dead ends: 302 [2022-07-12 09:53:51,494 INFO L226 Difference]: Without dead ends: 268 [2022-07-12 09:53:51,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:51,495 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 87 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:51,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 273 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:53:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-12 09:53:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 249. [2022-07-12 09:53:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 220 states have (on average 1.2136363636363636) internal successors, (267), 224 states have internal predecessors, (267), 22 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (25), 23 states have call predecessors, (25), 21 states have call successors, (25) [2022-07-12 09:53:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2022-07-12 09:53:51,506 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 51 [2022-07-12 09:53:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:51,506 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2022-07-12 09:53:51,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2022-07-12 09:53:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 09:53:51,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:51,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:51,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:51,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:51,715 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2071979516, now seen corresponding path program 1 times [2022-07-12 09:53:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:51,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880638744] [2022-07-12 09:53:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:51,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:51,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:51,717 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:51,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 09:53:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 09:53:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:51,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:51,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:51,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880638744] [2022-07-12 09:53:51,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880638744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:51,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:51,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:53:51,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130444194] [2022-07-12 09:53:51,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:53:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:53:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:53:51,853 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:51,968 INFO L93 Difference]: Finished difference Result 258 states and 322 transitions. [2022-07-12 09:53:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 09:53:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-12 09:53:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:51,969 INFO L225 Difference]: With dead ends: 258 [2022-07-12 09:53:51,969 INFO L226 Difference]: Without dead ends: 213 [2022-07-12 09:53:51,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:53:51,970 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:51,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:53:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-12 09:53:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2022-07-12 09:53:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 181 states have (on average 1.2209944751381216) internal successors, (221), 186 states have internal predecessors, (221), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-12 09:53:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 259 transitions. [2022-07-12 09:53:51,980 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 259 transitions. Word has length 51 [2022-07-12 09:53:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:51,980 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 259 transitions. [2022-07-12 09:53:51,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 259 transitions. [2022-07-12 09:53:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 09:53:51,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:51,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:51,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:52,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:52,182 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 447980418, now seen corresponding path program 1 times [2022-07-12 09:53:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049120560] [2022-07-12 09:53:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:52,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:52,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:52,184 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:52,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 09:53:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 09:53:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:52,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:53:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 09:53:53,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:53,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049120560] [2022-07-12 09:53:53,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049120560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:53:53,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 09:53:53,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-12 09:53:53,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713119334] [2022-07-12 09:53:53,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 09:53:53,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 09:53:53,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:53,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 09:53:53,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:53:53,414 INFO L87 Difference]: Start difference. First operand 207 states and 259 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:54,191 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2022-07-12 09:53:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 09:53:54,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-07-12 09:53:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:54,192 INFO L225 Difference]: With dead ends: 232 [2022-07-12 09:53:54,192 INFO L226 Difference]: Without dead ends: 201 [2022-07-12 09:53:54,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:53:54,193 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 78 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:54,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 566 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 09:53:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-12 09:53:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 185. [2022-07-12 09:53:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 159 states have (on average 1.2264150943396226) internal successors, (195), 165 states have internal predecessors, (195), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-12 09:53:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2022-07-12 09:53:54,201 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 51 [2022-07-12 09:53:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:54,202 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2022-07-12 09:53:54,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 09:53:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2022-07-12 09:53:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 09:53:54,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:54,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:54,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:54,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:54,411 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:54,411 INFO L85 PathProgramCache]: Analyzing trace with hash -826993692, now seen corresponding path program 1 times [2022-07-12 09:53:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:54,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423214627] [2022-07-12 09:53:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:54,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:54,413 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:54,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 09:53:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:54,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 09:53:54,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:53:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:53:54,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:53:54,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:53:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423214627] [2022-07-12 09:53:54,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423214627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:53:54,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:53:54,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:53:54,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008516407] [2022-07-12 09:53:54,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:53:54,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:53:54,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:53:54,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:53:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:53:54,772 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:53:56,022 INFO L93 Difference]: Finished difference Result 271 states and 349 transitions. [2022-07-12 09:53:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:53:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-07-12 09:53:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:53:56,023 INFO L225 Difference]: With dead ends: 271 [2022-07-12 09:53:56,023 INFO L226 Difference]: Without dead ends: 222 [2022-07-12 09:53:56,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:53:56,024 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 89 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:53:56,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 532 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 09:53:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-12 09:53:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 159. [2022-07-12 09:53:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 139 states have internal predecessors, (166), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 09:53:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2022-07-12 09:53:56,032 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 53 [2022-07-12 09:53:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:53:56,032 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2022-07-12 09:53:56,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 09:53:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2022-07-12 09:53:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:53:56,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:53:56,033 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:53:56,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-12 09:53:56,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:53:56,241 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:53:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:53:56,242 INFO L85 PathProgramCache]: Analyzing trace with hash 841846950, now seen corresponding path program 1 times [2022-07-12 09:53:56,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:53:56,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394296422] [2022-07-12 09:53:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:53:56,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:53:56,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:53:56,248 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:53:56,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 09:53:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:53:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 09:53:56,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:54:02,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:02,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:02,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394296422] [2022-07-12 09:54:02,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394296422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:02,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:02,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 09:54:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550330356] [2022-07-12 09:54:02,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:54:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:54:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-07-12 09:54:02,668 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:02,827 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2022-07-12 09:54:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:54:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-07-12 09:54:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:02,828 INFO L225 Difference]: With dead ends: 168 [2022-07-12 09:54:02,828 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 09:54:02,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2022-07-12 09:54:02,829 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 9 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:02,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 422 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-12 09:54:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 09:54:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-07-12 09:54:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 145 states have internal predecessors, (169), 23 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-12 09:54:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 213 transitions. [2022-07-12 09:54:02,837 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 213 transitions. Word has length 55 [2022-07-12 09:54:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:02,837 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 213 transitions. [2022-07-12 09:54:02,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 213 transitions. [2022-07-12 09:54:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 09:54:02,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:02,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:02,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:03,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:03,039 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 12170841, now seen corresponding path program 1 times [2022-07-12 09:54:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:03,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103185688] [2022-07-12 09:54:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:03,041 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:03,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 09:54:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 09:54:03,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:54:08,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:08,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:08,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103185688] [2022-07-12 09:54:08,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103185688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:08,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:08,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 09:54:08,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157868301] [2022-07-12 09:54:08,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:08,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:54:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:54:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-07-12 09:54:08,871 INFO L87 Difference]: Start difference. First operand 166 states and 213 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:09,022 INFO L93 Difference]: Finished difference Result 213 states and 272 transitions. [2022-07-12 09:54:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:54:09,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-07-12 09:54:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:09,023 INFO L225 Difference]: With dead ends: 213 [2022-07-12 09:54:09,023 INFO L226 Difference]: Without dead ends: 211 [2022-07-12 09:54:09,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2022-07-12 09:54:09,024 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 37 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:09,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 578 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-07-12 09:54:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-12 09:54:09,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2022-07-12 09:54:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2426470588235294) internal successors, (169), 142 states have internal predecessors, (169), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 09:54:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 207 transitions. [2022-07-12 09:54:09,033 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 207 transitions. Word has length 56 [2022-07-12 09:54:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:09,034 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 207 transitions. [2022-07-12 09:54:09,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:09,034 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 207 transitions. [2022-07-12 09:54:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 09:54:09,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:09,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:09,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:09,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:09,242 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash 590846065, now seen corresponding path program 1 times [2022-07-12 09:54:09,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:09,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453952667] [2022-07-12 09:54:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:09,244 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:09,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 09:54:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 09:54:09,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:54:11,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:11,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453952667] [2022-07-12 09:54:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453952667] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:11,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:11,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 09:54:11,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845802868] [2022-07-12 09:54:11,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:11,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 09:54:11,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 09:54:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-12 09:54:11,334 INFO L87 Difference]: Start difference. First operand 163 states and 207 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:16,566 INFO L93 Difference]: Finished difference Result 238 states and 304 transitions. [2022-07-12 09:54:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 09:54:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2022-07-12 09:54:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:16,568 INFO L225 Difference]: With dead ends: 238 [2022-07-12 09:54:16,568 INFO L226 Difference]: Without dead ends: 226 [2022-07-12 09:54:16,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-12 09:54:16,569 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 164 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1081 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-12 09:54:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-12 09:54:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 163. [2022-07-12 09:54:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 142 states have internal predecessors, (167), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 09:54:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2022-07-12 09:54:16,591 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 59 [2022-07-12 09:54:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:16,591 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2022-07-12 09:54:16,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2022-07-12 09:54:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 09:54:16,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:16,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:16,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:16,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:16,800 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:16,801 INFO L85 PathProgramCache]: Analyzing trace with hash -407457257, now seen corresponding path program 1 times [2022-07-12 09:54:16,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:16,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636702360] [2022-07-12 09:54:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:16,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:16,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:16,802 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:16,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 09:54:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:16,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 09:54:16,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:54:17,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:17,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:17,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636702360] [2022-07-12 09:54:17,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636702360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:17,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:17,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:54:17,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292011469] [2022-07-12 09:54:17,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:17,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:54:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:54:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:54:17,077 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 09:54:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:17,426 INFO L93 Difference]: Finished difference Result 182 states and 225 transitions. [2022-07-12 09:54:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:54:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2022-07-12 09:54:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:17,427 INFO L225 Difference]: With dead ends: 182 [2022-07-12 09:54:17,427 INFO L226 Difference]: Without dead ends: 180 [2022-07-12 09:54:17,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:54:17,428 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 40 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:17,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 504 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 09:54:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-12 09:54:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2022-07-12 09:54:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 139 states have (on average 1.223021582733813) internal successors, (170), 145 states have internal predecessors, (170), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 09:54:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 208 transitions. [2022-07-12 09:54:17,439 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 208 transitions. Word has length 61 [2022-07-12 09:54:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:17,439 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 208 transitions. [2022-07-12 09:54:17,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 09:54:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 208 transitions. [2022-07-12 09:54:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 09:54:17,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:17,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:17,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:17,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:17,648 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1933907116, now seen corresponding path program 1 times [2022-07-12 09:54:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:17,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98981090] [2022-07-12 09:54:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:17,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:17,665 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:17,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 09:54:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 09:54:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:54:19,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:19,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98981090] [2022-07-12 09:54:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98981090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:19,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:19,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 09:54:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700942524] [2022-07-12 09:54:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 09:54:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 09:54:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-12 09:54:19,211 INFO L87 Difference]: Start difference. First operand 167 states and 208 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:25,870 INFO L93 Difference]: Finished difference Result 432 states and 559 transitions. [2022-07-12 09:54:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 09:54:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-07-12 09:54:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:25,873 INFO L225 Difference]: With dead ends: 432 [2022-07-12 09:54:25,873 INFO L226 Difference]: Without dead ends: 400 [2022-07-12 09:54:25,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-12 09:54:25,873 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 460 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:25,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1007 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-12 09:54:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-07-12 09:54:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 197. [2022-07-12 09:54:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 173 states have internal predecessors, (200), 23 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-12 09:54:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2022-07-12 09:54:25,889 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 61 [2022-07-12 09:54:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:25,890 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2022-07-12 09:54:25,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:54:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2022-07-12 09:54:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 09:54:25,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:25,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:25,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:26,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:26,100 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash -131344237, now seen corresponding path program 1 times [2022-07-12 09:54:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:26,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576873973] [2022-07-12 09:54:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:26,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:26,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:26,103 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:26,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 09:54:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:26,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 09:54:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:54:26,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:26,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576873973] [2022-07-12 09:54:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576873973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:26,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:26,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:54:26,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206827284] [2022-07-12 09:54:26,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:26,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:54:26,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:54:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:54:26,376 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 09:54:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:26,757 INFO L93 Difference]: Finished difference Result 219 states and 270 transitions. [2022-07-12 09:54:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:54:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2022-07-12 09:54:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:26,759 INFO L225 Difference]: With dead ends: 219 [2022-07-12 09:54:26,759 INFO L226 Difference]: Without dead ends: 217 [2022-07-12 09:54:26,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:54:26,759 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 34 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:26,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 500 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 09:54:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-07-12 09:54:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 202. [2022-07-12 09:54:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 169 states have (on average 1.2011834319526626) internal successors, (203), 177 states have internal predecessors, (203), 24 states have call successors, (24), 7 states have call predecessors, (24), 8 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 09:54:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 249 transitions. [2022-07-12 09:54:26,775 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 249 transitions. Word has length 61 [2022-07-12 09:54:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:26,775 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 249 transitions. [2022-07-12 09:54:26,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 09:54:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 249 transitions. [2022-07-12 09:54:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 09:54:26,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:26,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:26,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:26,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:26,993 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash -943451417, now seen corresponding path program 1 times [2022-07-12 09:54:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355725119] [2022-07-12 09:54:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:26,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:26,995 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:26,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 09:54:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:27,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 09:54:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 09:54:32,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:32,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:32,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355725119] [2022-07-12 09:54:32,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355725119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:32,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:32,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 09:54:32,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872606456] [2022-07-12 09:54:32,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:32,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 09:54:32,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 09:54:32,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=131, Unknown=1, NotChecked=0, Total=156 [2022-07-12 09:54:32,048 INFO L87 Difference]: Start difference. First operand 202 states and 249 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:33,110 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2022-07-12 09:54:33,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 09:54:33,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-12 09:54:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:33,111 INFO L225 Difference]: With dead ends: 364 [2022-07-12 09:54:33,112 INFO L226 Difference]: Without dead ends: 344 [2022-07-12 09:54:33,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=32, Invalid=177, Unknown=1, NotChecked=0, Total=210 [2022-07-12 09:54:33,116 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 66 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:33,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1287 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 525 Unchecked, 0.4s Time] [2022-07-12 09:54:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-12 09:54:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2022-07-12 09:54:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 176 states have (on average 1.2045454545454546) internal successors, (212), 184 states have internal predecessors, (212), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 09:54:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 260 transitions. [2022-07-12 09:54:33,134 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 260 transitions. Word has length 66 [2022-07-12 09:54:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:33,135 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 260 transitions. [2022-07-12 09:54:33,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 260 transitions. [2022-07-12 09:54:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 09:54:33,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:33,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:33,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:33,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:33,345 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:33,345 INFO L85 PathProgramCache]: Analyzing trace with hash 979776617, now seen corresponding path program 1 times [2022-07-12 09:54:33,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:33,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682462084] [2022-07-12 09:54:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:33,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:33,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:33,347 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:33,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 09:54:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 09:54:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 09:54:37,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:37,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:37,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682462084] [2022-07-12 09:54:37,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682462084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:37,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:37,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 09:54:37,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056750071] [2022-07-12 09:54:37,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:37,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:54:37,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:54:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2022-07-12 09:54:37,883 INFO L87 Difference]: Start difference. First operand 210 states and 260 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:38,328 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-07-12 09:54:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 09:54:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-07-12 09:54:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:38,330 INFO L225 Difference]: With dead ends: 263 [2022-07-12 09:54:38,330 INFO L226 Difference]: Without dead ends: 243 [2022-07-12 09:54:38,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=29, Invalid=80, Unknown=1, NotChecked=0, Total=110 [2022-07-12 09:54:38,330 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 7 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:38,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 581 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2022-07-12 09:54:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-12 09:54:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2022-07-12 09:54:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 175 states have (on average 1.2) internal successors, (210), 183 states have internal predecessors, (210), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 09:54:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2022-07-12 09:54:38,349 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 66 [2022-07-12 09:54:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:38,349 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2022-07-12 09:54:38,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2022-07-12 09:54:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 09:54:38,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:38,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:38,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:38,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:38,558 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:38,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1210749100, now seen corresponding path program 1 times [2022-07-12 09:54:38,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:38,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756545516] [2022-07-12 09:54:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:38,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:38,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:38,560 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:38,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 09:54:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:38,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 09:54:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 09:54:42,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:54:44,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:44,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756545516] [2022-07-12 09:54:44,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756545516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:54:44,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1354158432] [2022-07-12 09:54:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:44,361 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 09:54:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 09:54:44,363 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 09:54:44,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-12 09:54:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:44,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 09:54:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 09:54:45,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:45,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1354158432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:45,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 09:54:45,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 13 [2022-07-12 09:54:45,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802522008] [2022-07-12 09:54:45,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:45,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 09:54:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:45,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 09:54:45,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-07-12 09:54:45,501 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:46,571 INFO L93 Difference]: Finished difference Result 346 states and 433 transitions. [2022-07-12 09:54:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 09:54:46,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-07-12 09:54:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:46,573 INFO L225 Difference]: With dead ends: 346 [2022-07-12 09:54:46,573 INFO L226 Difference]: Without dead ends: 326 [2022-07-12 09:54:46,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-07-12 09:54:46,575 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 62 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:46,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1028 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2022-07-12 09:54:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-12 09:54:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 211. [2022-07-12 09:54:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 177 states have (on average 1.2090395480225988) internal successors, (214), 185 states have internal predecessors, (214), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 09:54:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 262 transitions. [2022-07-12 09:54:46,597 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 262 transitions. Word has length 67 [2022-07-12 09:54:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:46,598 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 262 transitions. [2022-07-12 09:54:46,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 262 transitions. [2022-07-12 09:54:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 09:54:46,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:46,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:46,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:46,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:47,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 09:54:47,009 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1980026946, now seen corresponding path program 1 times [2022-07-12 09:54:47,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:47,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276603980] [2022-07-12 09:54:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:47,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:47,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:47,011 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:47,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 09:54:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:47,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 09:54:47,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 09:54:49,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:49,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:49,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276603980] [2022-07-12 09:54:49,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276603980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:49,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:49,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 09:54:49,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110694697] [2022-07-12 09:54:49,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:49,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 09:54:49,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:49,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 09:54:49,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-12 09:54:49,138 INFO L87 Difference]: Start difference. First operand 211 states and 262 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:54,946 INFO L93 Difference]: Finished difference Result 314 states and 391 transitions. [2022-07-12 09:54:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 09:54:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-07-12 09:54:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:54,948 INFO L225 Difference]: With dead ends: 314 [2022-07-12 09:54:54,948 INFO L226 Difference]: Without dead ends: 306 [2022-07-12 09:54:54,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-12 09:54:54,949 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 126 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:54,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 919 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-12 09:54:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-12 09:54:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 212. [2022-07-12 09:54:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 178 states have (on average 1.202247191011236) internal successors, (214), 186 states have internal predecessors, (214), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 09:54:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2022-07-12 09:54:54,972 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 67 [2022-07-12 09:54:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:54,972 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2022-07-12 09:54:54,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2022-07-12 09:54:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 09:54:54,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:54,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:54,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:55,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:55,181 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1720222190, now seen corresponding path program 1 times [2022-07-12 09:54:55,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:55,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913124469] [2022-07-12 09:54:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:55,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:55,183 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:55,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-12 09:54:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 09:54:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 09:54:56,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:56,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913124469] [2022-07-12 09:54:56,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913124469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:56,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:56,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 09:54:56,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731497633] [2022-07-12 09:54:56,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:56,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:54:56,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:54:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:54:56,351 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:58,167 INFO L93 Difference]: Finished difference Result 339 states and 421 transitions. [2022-07-12 09:54:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:54:58,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2022-07-12 09:54:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:58,169 INFO L225 Difference]: With dead ends: 339 [2022-07-12 09:54:58,169 INFO L226 Difference]: Without dead ends: 319 [2022-07-12 09:54:58,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 09:54:58,170 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 77 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:58,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 739 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 128 Unchecked, 0.6s Time] [2022-07-12 09:54:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-12 09:54:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 202. [2022-07-12 09:54:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 170 states have (on average 1.188235294117647) internal successors, (202), 177 states have internal predecessors, (202), 23 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-12 09:54:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 246 transitions. [2022-07-12 09:54:58,189 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 246 transitions. Word has length 67 [2022-07-12 09:54:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:58,190 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 246 transitions. [2022-07-12 09:54:58,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 09:54:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 246 transitions. [2022-07-12 09:54:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 09:54:58,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:58,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:58,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:58,399 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -7943642, now seen corresponding path program 1 times [2022-07-12 09:54:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:58,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940696523] [2022-07-12 09:54:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:58,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:58,402 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:58,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-12 09:54:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:58,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 09:54:58,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 09:54:58,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:58,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940696523] [2022-07-12 09:54:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940696523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:58,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:58,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:54:58,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393367500] [2022-07-12 09:54:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:58,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:54:58,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:54:58,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:54:58,674 INFO L87 Difference]: Start difference. First operand 202 states and 246 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 09:54:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:59,017 INFO L93 Difference]: Finished difference Result 237 states and 285 transitions. [2022-07-12 09:54:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:54:59,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-07-12 09:54:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:59,019 INFO L225 Difference]: With dead ends: 237 [2022-07-12 09:54:59,019 INFO L226 Difference]: Without dead ends: 223 [2022-07-12 09:54:59,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:54:59,019 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 30 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:59,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 486 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 09:54:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-12 09:54:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2022-07-12 09:54:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 164 states have (on average 1.1829268292682926) internal successors, (194), 174 states have internal predecessors, (194), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (22), 17 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 09:54:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 240 transitions. [2022-07-12 09:54:59,043 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 240 transitions. Word has length 69 [2022-07-12 09:54:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:59,044 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 240 transitions. [2022-07-12 09:54:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 09:54:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 240 transitions. [2022-07-12 09:54:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 09:54:59,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:59,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:59,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-12 09:54:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:54:59,256 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:54:59,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:54:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1053686940, now seen corresponding path program 1 times [2022-07-12 09:54:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:54:59,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796735120] [2022-07-12 09:54:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:54:59,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:54:59,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:54:59,258 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:54:59,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 09:54:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:54:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 09:54:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:54:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 09:54:59,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:54:59,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:54:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796735120] [2022-07-12 09:54:59,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796735120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:54:59,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:54:59,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:54:59,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711886692] [2022-07-12 09:54:59,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:54:59,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:54:59,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:54:59,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:54:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:54:59,513 INFO L87 Difference]: Start difference. First operand 198 states and 240 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 09:54:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:54:59,853 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2022-07-12 09:54:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:54:59,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-07-12 09:54:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:54:59,855 INFO L225 Difference]: With dead ends: 227 [2022-07-12 09:54:59,855 INFO L226 Difference]: Without dead ends: 213 [2022-07-12 09:54:59,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:54:59,855 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 30 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 09:54:59,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 486 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 09:54:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-12 09:54:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 168. [2022-07-12 09:54:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 141 states have (on average 1.198581560283688) internal successors, (169), 147 states have internal predecessors, (169), 18 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-12 09:54:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions. [2022-07-12 09:54:59,890 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 69 [2022-07-12 09:54:59,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:54:59,890 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 204 transitions. [2022-07-12 09:54:59,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-12 09:54:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions. [2022-07-12 09:54:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 09:54:59,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:54:59,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:54:59,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-12 09:55:00,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:55:00,099 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:55:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:55:00,099 INFO L85 PathProgramCache]: Analyzing trace with hash -954827573, now seen corresponding path program 1 times [2022-07-12 09:55:00,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:55:00,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243673781] [2022-07-12 09:55:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:55:00,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:55:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:55:00,101 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:55:00,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-12 09:55:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:55:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 09:55:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:55:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 09:55:01,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:55:02,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:55:02,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243673781] [2022-07-12 09:55:02,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243673781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:55:02,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1658466538] [2022-07-12 09:55:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:55:02,909 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 09:55:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 09:55:02,910 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 09:55:02,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-12 09:55:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:55:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 09:55:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:55:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 09:55:03,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:55:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 09:55:03,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1658466538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:55:03,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:55:03,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 12 [2022-07-12 09:55:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238991839] [2022-07-12 09:55:03,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:55:03,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 09:55:03,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:55:03,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 09:55:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-07-12 09:55:03,699 INFO L87 Difference]: Start difference. First operand 168 states and 204 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 09:55:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:55:05,089 INFO L93 Difference]: Finished difference Result 196 states and 230 transitions. [2022-07-12 09:55:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 09:55:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 68 [2022-07-12 09:55:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:55:05,090 INFO L225 Difference]: With dead ends: 196 [2022-07-12 09:55:05,090 INFO L226 Difference]: Without dead ends: 143 [2022-07-12 09:55:05,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-07-12 09:55:05,091 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 52 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 09:55:05,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 826 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 62 Unchecked, 0.7s Time] [2022-07-12 09:55:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-12 09:55:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-12 09:55:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.194915254237288) internal successors, (141), 124 states have internal predecessors, (141), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-12 09:55:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2022-07-12 09:55:05,108 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 68 [2022-07-12 09:55:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:55:05,108 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2022-07-12 09:55:05,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 09:55:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2022-07-12 09:55:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 09:55:05,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:55:05,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:55:05,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-07-12 09:55:05,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-07-12 09:55:05,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 09:55:05,520 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:55:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:55:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1492423721, now seen corresponding path program 1 times [2022-07-12 09:55:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:55:05,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097181418] [2022-07-12 09:55:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:55:05,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:55:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:55:05,523 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:55:05,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-12 09:55:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:55:05,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 09:55:05,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:55:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 09:55:05,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:55:05,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:55:05,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097181418] [2022-07-12 09:55:05,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097181418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:55:05,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:55:05,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 09:55:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089976350] [2022-07-12 09:55:05,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:55:05,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:55:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:55:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:55:05,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:55:05,817 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:55:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:55:05,942 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2022-07-12 09:55:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 09:55:05,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2022-07-12 09:55:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:55:05,943 INFO L225 Difference]: With dead ends: 171 [2022-07-12 09:55:05,943 INFO L226 Difference]: Without dead ends: 116 [2022-07-12 09:55:05,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:55:05,944 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 43 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:55:05,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 236 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:55:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-12 09:55:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2022-07-12 09:55:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 94 states have internal predecessors, (106), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 09:55:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2022-07-12 09:55:05,954 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 70 [2022-07-12 09:55:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:55:05,954 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2022-07-12 09:55:05,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 09:55:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2022-07-12 09:55:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 09:55:05,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:55:05,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:55:05,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-12 09:55:06,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 09:55:06,163 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:55:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:55:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -751559577, now seen corresponding path program 1 times [2022-07-12 09:55:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 09:55:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373472562] [2022-07-12 09:55:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:55:06,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 09:55:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 09:55:06,165 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 09:55:06,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-12 09:55:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:55:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 09:55:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:55:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 09:55:07,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:55:08,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 09:55:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373472562] [2022-07-12 09:55:08,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373472562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:55:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [405879979] [2022-07-12 09:55:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:55:08,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 09:55:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 09:55:08,107 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 09:55:08,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-12 09:55:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:55:08,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 09:55:08,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:55:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 09:55:08,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 09:55:08,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [405879979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:55:08,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 09:55:08,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-07-12 09:55:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762338977] [2022-07-12 09:55:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:55:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:55:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 09:55:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:55:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-07-12 09:55:08,768 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)