./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/avg10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/avg10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:31:31,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:31:31,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:31:31,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:31:31,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:31:31,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:31:31,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:31:31,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:31:31,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:31:31,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:31:31,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:31:31,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:31:31,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:31:31,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:31:31,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:31:31,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:31:31,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:31:31,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:31:31,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:31:31,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:31:31,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:31:31,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:31:31,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:31:31,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:31:31,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:31:31,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:31:31,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:31:31,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:31:31,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:31:31,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:31:31,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:31:31,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:31:31,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:31:31,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:31:31,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:31:31,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:31:31,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:31:31,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:31:31,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:31:31,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:31:31,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:31:31,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:31:31,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:31:31,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:31:31,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:31:31,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:31:31,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:31:31,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:31:31,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:31:31,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:31:31,175 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:31:31,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:31:31,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:31:31,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:31:31,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:31:31,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:31:31,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:31:31,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:31:31,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:31:31,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:31:31,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:31:31,177 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:31:31,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:31:31,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:31:31,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:31:31,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:31:31,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:31:31,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:31:31,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:31:31,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:31:31,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:31:31,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:31:31,178 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:31:31,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:31:31,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:31:31,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:31:31,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 [2021-12-15 21:31:31,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:31:31,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:31:31,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:31:31,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:31:31,389 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:31:31,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg10-2.i [2021-12-15 21:31:31,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eb8c6b8/c2069eb06ef04864b39350bc8b1a95a0/FLAG3199ae75e [2021-12-15 21:31:31,786 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:31:31,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg10-2.i [2021-12-15 21:31:31,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eb8c6b8/c2069eb06ef04864b39350bc8b1a95a0/FLAG3199ae75e [2021-12-15 21:31:32,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eb8c6b8/c2069eb06ef04864b39350bc8b1a95a0 [2021-12-15 21:31:32,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:31:32,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:31:32,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:31:32,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:31:32,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:31:32,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6bad8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32, skipping insertion in model container [2021-12-15 21:31:32,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:31:32,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:31:32,378 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/reducercommutativity/avg10-2.i[1282,1295] [2021-12-15 21:31:32,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:31:32,386 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:31:32,400 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/reducercommutativity/avg10-2.i[1282,1295] [2021-12-15 21:31:32,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:31:32,413 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:31:32,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32 WrapperNode [2021-12-15 21:31:32,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:31:32,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:31:32,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:31:32,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:31:32,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,445 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-15 21:31:32,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:31:32,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:31:32,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:31:32,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:31:32,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:31:32,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:31:32,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:31:32,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:31:32,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (1/1) ... [2021-12-15 21:31:32,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:31:32,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:32,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:31:32,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:31:32,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:31:32,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:31:32,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:31:32,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:31:32,527 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2021-12-15 21:31:32,527 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2021-12-15 21:31:32,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:31:32,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:31:32,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:31:32,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:31:32,577 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:31:32,579 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:31:32,729 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:31:32,733 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:31:32,733 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 21:31:32,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:31:32 BoogieIcfgContainer [2021-12-15 21:31:32,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:31:32,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:31:32,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:31:32,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:31:32,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:31:32" (1/3) ... [2021-12-15 21:31:32,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c7c4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:31:32, skipping insertion in model container [2021-12-15 21:31:32,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:31:32" (2/3) ... [2021-12-15 21:31:32,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c7c4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:31:32, skipping insertion in model container [2021-12-15 21:31:32,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:31:32" (3/3) ... [2021-12-15 21:31:32,760 INFO L111 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2021-12-15 21:31:32,764 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:31:32,764 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:31:32,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:31:32,797 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:31:32,798 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:31:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:31:32,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:32,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:32,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2021-12-15 21:31:32,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:32,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570134474] [2021-12-15 21:31:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:32,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:31:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:32,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 21:31:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:31:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:31:33,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:33,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570134474] [2021-12-15 21:31:33,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570134474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:33,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97419250] [2021-12-15 21:31:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:33,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:33,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:33,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:33,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:31:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:31:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:31:33,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:31:33,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97419250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:31:33,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:31:33,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:31:33,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875570301] [2021-12-15 21:31:33,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:31:33,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:31:33,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:31:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:33,228 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:31:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:33,256 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-15 21:31:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:31:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-15 21:31:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:33,271 INFO L225 Difference]: With dead ends: 50 [2021-12-15 21:31:33,272 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 21:31:33,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:33,280 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:33,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 21:31:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-15 21:31:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-15 21:31:33,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-15 21:31:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:33,323 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-15 21:31:33,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:31:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-15 21:31:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 21:31:33,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:33,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:33,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 21:31:33,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-15 21:31:33,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2021-12-15 21:31:33,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:33,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394868636] [2021-12-15 21:31:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:33,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 21:31:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 21:31:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-15 21:31:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:31:33,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:33,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394868636] [2021-12-15 21:31:33,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394868636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:33,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168908730] [2021-12-15 21:31:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:33,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:33,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:33,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:33,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:31:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:31:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:31:33,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:31:33,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168908730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:31:33,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:31:33,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 21:31:33,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067802139] [2021-12-15 21:31:33,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:31:33,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:31:33,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:31:33,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:33,704 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:33,711 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-15 21:31:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:31:33,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-15 21:31:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:33,712 INFO L225 Difference]: With dead ends: 42 [2021-12-15 21:31:33,712 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 21:31:33,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:31:33,714 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:33,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 21:31:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-15 21:31:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-15 21:31:33,718 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-12-15 21:31:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:33,718 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-15 21:31:33,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-15 21:31:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 21:31:33,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:33,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:33,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 21:31:33,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-15 21:31:33,936 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2021-12-15 21:31:33,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:33,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921245182] [2021-12-15 21:31:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:33,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 21:31:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:31:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-15 21:31:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 21:31:33,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:33,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921245182] [2021-12-15 21:31:33,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921245182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:33,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149873970] [2021-12-15 21:31:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:33,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:33,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:33,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:33,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:31:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 21:31:34,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 21:31:34,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:31:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149873970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:31:34,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:31:34,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 21:31:34,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532984390] [2021-12-15 21:31:34,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:31:34,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:31:34,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:31:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:34,106 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:34,123 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-15 21:31:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:31:34,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-15 21:31:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:34,125 INFO L225 Difference]: With dead ends: 39 [2021-12-15 21:31:34,125 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 21:31:34,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:31:34,128 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:34,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 21:31:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-15 21:31:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-15 21:31:34,137 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-12-15 21:31:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:34,138 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-15 21:31:34,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:31:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-15 21:31:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 21:31:34,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:34,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:34,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 21:31:34,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:34,345 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2021-12-15 21:31:34,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:34,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239870484] [2021-12-15 21:31:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:34,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-15 21:31:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:31:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-15 21:31:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 21:31:34,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:34,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239870484] [2021-12-15 21:31:34,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239870484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:34,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742763449] [2021-12-15 21:31:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:34,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:34,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:34,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:31:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 21:31:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-15 21:31:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-15 21:31:34,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742763449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:34,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:34,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-15 21:31:34,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386901601] [2021-12-15 21:31:34,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:34,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:31:34,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:31:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:34,609 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-15 21:31:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:34,641 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-15 21:31:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:31:34,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-12-15 21:31:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:34,642 INFO L225 Difference]: With dead ends: 54 [2021-12-15 21:31:34,642 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 21:31:34,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:34,643 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:34,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 21:31:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-15 21:31:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-15 21:31:34,647 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-12-15 21:31:34,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:34,647 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-15 21:31:34,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-15 21:31:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-15 21:31:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 21:31:34,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:34,648 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:34,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:34,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:34,869 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2021-12-15 21:31:34,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:34,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757063564] [2021-12-15 21:31:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:34,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:31:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-15 21:31:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-15 21:31:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-15 21:31:34,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:34,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757063564] [2021-12-15 21:31:34,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757063564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:34,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222258073] [2021-12-15 21:31:34,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:31:34,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:34,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:34,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:31:34,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:31:34,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:31:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 21:31:35,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 21:31:35,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222258073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:35,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:35,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-15 21:31:35,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102357983] [2021-12-15 21:31:35,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:35,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:31:35,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:31:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:31:35,175 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-15 21:31:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:35,218 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-12-15 21:31:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 21:31:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-12-15 21:31:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:35,220 INFO L225 Difference]: With dead ends: 70 [2021-12-15 21:31:35,220 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 21:31:35,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:31:35,221 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:35,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 21:31:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-15 21:31:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-15 21:31:35,226 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2021-12-15 21:31:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:35,226 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-15 21:31:35,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-15 21:31:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-15 21:31:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 21:31:35,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:35,228 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:35,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:35,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:35,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2021-12-15 21:31:35,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244330990] [2021-12-15 21:31:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:35,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:35,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:31:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:35,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-15 21:31:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:35,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:31:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-15 21:31:35,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:35,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244330990] [2021-12-15 21:31:35,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244330990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:35,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298795970] [2021-12-15 21:31:35,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:31:35,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:35,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:35,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:35,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:31:35,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:31:35,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:35,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:31:35,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-15 21:31:35,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-15 21:31:35,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298795970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:35,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:35,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-15 21:31:35,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257521479] [2021-12-15 21:31:35,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:35,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:31:35,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:31:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:31:35,758 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-15 21:31:35,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:35,782 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-12-15 21:31:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:31:35,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2021-12-15 21:31:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:35,785 INFO L225 Difference]: With dead ends: 78 [2021-12-15 21:31:35,785 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 21:31:35,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:31:35,787 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:35,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 21:31:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-15 21:31:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-12-15 21:31:35,793 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2021-12-15 21:31:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:35,794 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-12-15 21:31:35,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-15 21:31:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-12-15 21:31:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 21:31:35,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:35,795 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:35,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:36,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:36,002 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash 571451455, now seen corresponding path program 4 times [2021-12-15 21:31:36,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:36,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752882727] [2021-12-15 21:31:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:36,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:31:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-15 21:31:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-15 21:31:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-12-15 21:31:36,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752882727] [2021-12-15 21:31:36,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752882727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714896688] [2021-12-15 21:31:36,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:31:36,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:36,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:36,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:31:36,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:31:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:36,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:31:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-12-15 21:31:36,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-12-15 21:31:36,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714896688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:36,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:36,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-12-15 21:31:36,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128584361] [2021-12-15 21:31:36,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:36,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:31:36,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:36,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:31:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:31:36,365 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-15 21:31:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:36,394 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2021-12-15 21:31:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 21:31:36,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 88 [2021-12-15 21:31:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:36,395 INFO L225 Difference]: With dead ends: 94 [2021-12-15 21:31:36,395 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 21:31:36,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:31:36,396 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:36,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 90 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 21:31:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-15 21:31:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-12-15 21:31:36,400 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2021-12-15 21:31:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:36,400 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-12-15 21:31:36,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-15 21:31:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-12-15 21:31:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 21:31:36,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:36,402 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:36,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 21:31:36,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:36,611 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2026866377, now seen corresponding path program 5 times [2021-12-15 21:31:36,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:36,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813502238] [2021-12-15 21:31:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:36,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:31:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-15 21:31:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-15 21:31:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-15 21:31:36,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:36,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813502238] [2021-12-15 21:31:36,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813502238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:36,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160862474] [2021-12-15 21:31:36,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:31:36,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:36,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:36,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:36,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:31:36,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-15 21:31:36,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:31:36,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 450 proven. 4 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-12-15 21:31:37,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-15 21:31:37,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160862474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:37,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:37,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-15 21:31:37,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410011298] [2021-12-15 21:31:37,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:37,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:31:37,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:31:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:37,212 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 21:31:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:37,236 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2021-12-15 21:31:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:31:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 112 [2021-12-15 21:31:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:37,237 INFO L225 Difference]: With dead ends: 102 [2021-12-15 21:31:37,237 INFO L226 Difference]: Without dead ends: 71 [2021-12-15 21:31:37,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:31:37,238 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:37,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-15 21:31:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-15 21:31:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-12-15 21:31:37,242 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 112 [2021-12-15 21:31:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:37,243 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-12-15 21:31:37,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 21:31:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-12-15 21:31:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-15 21:31:37,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:37,244 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:37,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:37,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-15 21:31:37,465 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:37,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2045037743, now seen corresponding path program 6 times [2021-12-15 21:31:37,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:37,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311261946] [2021-12-15 21:31:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:37,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:37,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:31:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:37,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-15 21:31:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:37,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-15 21:31:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:31:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-15 21:31:37,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:31:37,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311261946] [2021-12-15 21:31:37,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311261946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:31:37,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080026960] [2021-12-15 21:31:37,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:31:37,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:37,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:31:37,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:31:37,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:31:37,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-15 21:31:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:31:37,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:31:37,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:31:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 450 proven. 36 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-12-15 21:31:38,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:31:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-15 21:31:38,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080026960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:31:38,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:31:38,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-12-15 21:31:38,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487929607] [2021-12-15 21:31:38,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:31:38,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:31:38,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:31:38,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:31:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:31:38,135 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 21:31:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:31:38,155 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-12-15 21:31:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:31:38,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-12-15 21:31:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:31:38,156 INFO L225 Difference]: With dead ends: 108 [2021-12-15 21:31:38,157 INFO L226 Difference]: Without dead ends: 77 [2021-12-15 21:31:38,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:31:38,157 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:31:38,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:31:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-15 21:31:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-15 21:31:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 21:31:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-12-15 21:31:38,162 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 120 [2021-12-15 21:31:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:31:38,162 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-12-15 21:31:38,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-15 21:31:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-12-15 21:31:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 21:31:38,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:31:38,163 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:31:38,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:31:38,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:31:38,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:31:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:31:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1529370487, now seen corresponding path program 7 times [2021-12-15 21:31:38,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:31:38,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126008730] [2021-12-15 21:31:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:31:38,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:31:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat