./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-simple/nested_4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f0612232c1c27f632e5ebc1ac9944571433fe3b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:31:15,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:31:15,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:31:15,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:31:15,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:31:15,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:31:15,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:31:15,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:31:15,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:31:15,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:31:15,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:31:15,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:31:15,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:31:15,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:31:15,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:31:15,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:31:15,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:31:15,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:31:15,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:31:15,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:31:15,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:31:15,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:31:15,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:31:15,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:31:15,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:31:15,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:31:15,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:31:15,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:31:15,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:31:15,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:31:15,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:31:15,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:31:15,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:31:15,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:31:15,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:31:15,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:31:15,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:31:15,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:31:15,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:31:15,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:31:15,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:31:15,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:31:15,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:31:15,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:31:15,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:31:15,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:31:15,235 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:31:15,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:31:15,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:31:15,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:31:15,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:31:15,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:31:15,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:31:15,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:31:15,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:31:15,239 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:31:15,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:31:15,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:31:15,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:31:15,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:31:15,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:31:15,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:31:15,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:31:15,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:31:15,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:31:15,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:31:15,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:31:15,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:31:15,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:31:15,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:31:15,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:31:15,243 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f0612232c1c27f632e5ebc1ac9944571433fe3b [2020-10-25 22:31:15,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:31:15,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:31:15,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:31:15,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:31:15,735 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:31:15,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_4.c [2020-10-25 22:31:15,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702db8f2e/0056c4915919420bb79cab6b4e6f1948/FLAG9d0b8704f [2020-10-25 22:31:16,526 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:31:16,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c [2020-10-25 22:31:16,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702db8f2e/0056c4915919420bb79cab6b4e6f1948/FLAG9d0b8704f [2020-10-25 22:31:16,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702db8f2e/0056c4915919420bb79cab6b4e6f1948 [2020-10-25 22:31:16,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:31:16,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:31:16,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:31:16,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:31:16,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:31:16,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:31:16" (1/1) ... [2020-10-25 22:31:16,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b4314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:16, skipping insertion in model container [2020-10-25 22:31:16,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:31:16" (1/1) ... [2020-10-25 22:31:16,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:31:16,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:31:17,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:31:17,154 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:31:17,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:31:17,185 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:31:17,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17 WrapperNode [2020-10-25 22:31:17,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:31:17,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:31:17,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:31:17,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:31:17,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:31:17,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:31:17,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:31:17,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:31:17,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... [2020-10-25 22:31:17,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:31:17,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:31:17,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:31:17,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:31:17,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:31:17,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:31:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:31:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:31:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:31:17,733 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:31:17,734 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 22:31:17,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:31:17 BoogieIcfgContainer [2020-10-25 22:31:17,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:31:17,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:31:17,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:31:17,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:31:17,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:31:16" (1/3) ... [2020-10-25 22:31:17,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe0d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:31:17, skipping insertion in model container [2020-10-25 22:31:17,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:31:17" (2/3) ... [2020-10-25 22:31:17,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe0d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:31:17, skipping insertion in model container [2020-10-25 22:31:17,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:31:17" (3/3) ... [2020-10-25 22:31:17,757 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2020-10-25 22:31:17,782 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:31:17,789 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:31:17,808 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:31:17,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:31:17,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:31:17,865 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:31:17,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:31:17,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:31:17,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:31:17,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:31:17,866 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:31:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 22:31:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-25 22:31:17,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:17,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-25 22:31:17,914 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:17,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:17,924 INFO L82 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2020-10-25 22:31:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:17,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850952323] [2020-10-25 22:31:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:18,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850952323] [2020-10-25 22:31:18,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:31:18,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:31:18,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071745408] [2020-10-25 22:31:18,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:31:18,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:18,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:31:18,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:31:18,191 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-25 22:31:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:18,215 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2020-10-25 22:31:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:31:18,217 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-10-25 22:31:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:18,227 INFO L225 Difference]: With dead ends: 32 [2020-10-25 22:31:18,228 INFO L226 Difference]: Without dead ends: 13 [2020-10-25 22:31:18,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:31:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-25 22:31:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-25 22:31:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-25 22:31:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-10-25 22:31:18,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2020-10-25 22:31:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:18,273 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-10-25 22:31:18,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:31:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-10-25 22:31:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-25 22:31:18,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:18,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-25 22:31:18,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:31:18,274 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:18,275 INFO L82 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2020-10-25 22:31:18,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:18,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907421666] [2020-10-25 22:31:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907421666] [2020-10-25 22:31:18,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:31:18,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:31:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629536764] [2020-10-25 22:31:18,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:31:18,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:31:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,343 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-10-25 22:31:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:18,371 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-10-25 22:31:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:31:18,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-10-25 22:31:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:18,373 INFO L225 Difference]: With dead ends: 24 [2020-10-25 22:31:18,374 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 22:31:18,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 22:31:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2020-10-25 22:31:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-25 22:31:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-10-25 22:31:18,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2020-10-25 22:31:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:18,380 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-10-25 22:31:18,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:31:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-10-25 22:31:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-25 22:31:18,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:18,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:31:18,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:31:18,382 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2020-10-25 22:31:18,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:18,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948433570] [2020-10-25 22:31:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:18,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948433570] [2020-10-25 22:31:18,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:31:18,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:31:18,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767706443] [2020-10-25 22:31:18,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:31:18,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:31:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,428 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-10-25 22:31:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:18,455 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-10-25 22:31:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:31:18,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-25 22:31:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:18,456 INFO L225 Difference]: With dead ends: 31 [2020-10-25 22:31:18,457 INFO L226 Difference]: Without dead ends: 20 [2020-10-25 22:31:18,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-25 22:31:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2020-10-25 22:31:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-25 22:31:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-25 22:31:18,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-10-25 22:31:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:18,462 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-25 22:31:18,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:31:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-10-25 22:31:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:31:18,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:18,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:31:18,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 22:31:18,463 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:18,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2020-10-25 22:31:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:18,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104831855] [2020-10-25 22:31:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:18,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104831855] [2020-10-25 22:31:18,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:31:18,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:31:18,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694588541] [2020-10-25 22:31:18,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:31:18,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:31:18,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,502 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-10-25 22:31:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:18,529 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-25 22:31:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:31:18,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-25 22:31:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:18,531 INFO L225 Difference]: With dead ends: 31 [2020-10-25 22:31:18,531 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 22:31:18,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 22:31:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-10-25 22:31:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 22:31:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-25 22:31:18,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-10-25 22:31:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:18,537 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-25 22:31:18,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:31:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-10-25 22:31:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:31:18,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:18,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:31:18,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 22:31:18,538 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2020-10-25 22:31:18,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:18,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291084865] [2020-10-25 22:31:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:18,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291084865] [2020-10-25 22:31:18,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:31:18,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:31:18,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523455901] [2020-10-25 22:31:18,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:31:18,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:31:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,599 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-10-25 22:31:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:18,642 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-25 22:31:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:31:18,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-25 22:31:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:18,643 INFO L225 Difference]: With dead ends: 31 [2020-10-25 22:31:18,644 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 22:31:18,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:31:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 22:31:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-25 22:31:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-25 22:31:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-25 22:31:18,652 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-25 22:31:18,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:18,653 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-25 22:31:18,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:31:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-25 22:31:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 22:31:18,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:18,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:31:18,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 22:31:18,655 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:18,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2020-10-25 22:31:18,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:18,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520181959] [2020-10-25 22:31:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:18,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520181959] [2020-10-25 22:31:18,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136838907] [2020-10-25 22:31:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:31:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:18,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:18,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-25 22:31:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237737650] [2020-10-25 22:31:18,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:31:18,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:31:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:31:18,881 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-10-25 22:31:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:18,912 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-10-25 22:31:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:31:18,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-25 22:31:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:18,913 INFO L225 Difference]: With dead ends: 34 [2020-10-25 22:31:18,914 INFO L226 Difference]: Without dead ends: 20 [2020-10-25 22:31:18,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:31:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-25 22:31:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-25 22:31:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-25 22:31:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-25 22:31:18,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-25 22:31:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:18,921 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-25 22:31:18,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:31:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-25 22:31:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:31:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:18,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:31:19,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 22:31:19,136 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1763285690, now seen corresponding path program 2 times [2020-10-25 22:31:19,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:19,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206933932] [2020-10-25 22:31:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 22:31:19,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206933932] [2020-10-25 22:31:19,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129544387] [2020-10-25 22:31:19,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:19,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:31:19,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:19,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:31:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:31:19,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:19,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-25 22:31:19,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823811345] [2020-10-25 22:31:19,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:31:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:31:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:31:19,289 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-10-25 22:31:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:19,461 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-25 22:31:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-25 22:31:19,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-25 22:31:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:19,463 INFO L225 Difference]: With dead ends: 57 [2020-10-25 22:31:19,463 INFO L226 Difference]: Without dead ends: 41 [2020-10-25 22:31:19,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:31:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-25 22:31:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-10-25 22:31:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:31:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-25 22:31:19,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-25 22:31:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:19,472 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-25 22:31:19,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:31:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-25 22:31:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-25 22:31:19,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:19,474 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:31:19,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:19,690 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1745752790, now seen corresponding path program 3 times [2020-10-25 22:31:19,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:19,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299954055] [2020-10-25 22:31:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-25 22:31:19,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299954055] [2020-10-25 22:31:19,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4660534] [2020-10-25 22:31:19,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:19,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-25 22:31:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:31:19,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-25 22:31:19,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:19,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-25 22:31:19,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452824985] [2020-10-25 22:31:19,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:31:19,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:19,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:31:19,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:31:19,875 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-25 22:31:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:19,984 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2020-10-25 22:31:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 22:31:19,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-25 22:31:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:19,987 INFO L225 Difference]: With dead ends: 227 [2020-10-25 22:31:19,987 INFO L226 Difference]: Without dead ends: 200 [2020-10-25 22:31:19,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:31:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-25 22:31:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 96. [2020-10-25 22:31:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-25 22:31:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-25 22:31:20,007 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2020-10-25 22:31:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:20,007 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-25 22:31:20,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:31:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-25 22:31:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-25 22:31:20,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:20,011 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:20,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:20,225 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash 305051558, now seen corresponding path program 4 times [2020-10-25 22:31:20,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:20,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139017560] [2020-10-25 22:31:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-10-25 22:31:20,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139017560] [2020-10-25 22:31:20,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116093601] [2020-10-25 22:31:20,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:20,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:31:20,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:31:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-10-25 22:31:20,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:20,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-25 22:31:20,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504046795] [2020-10-25 22:31:20,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:31:20,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:20,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:31:20,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:31:20,437 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-10-25 22:31:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:20,475 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2020-10-25 22:31:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:31:20,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-25 22:31:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:20,477 INFO L225 Difference]: With dead ends: 204 [2020-10-25 22:31:20,478 INFO L226 Difference]: Without dead ends: 120 [2020-10-25 22:31:20,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:31:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-25 22:31:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-10-25 22:31:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-25 22:31:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2020-10-25 22:31:20,494 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 95 [2020-10-25 22:31:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:20,494 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2020-10-25 22:31:20,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:31:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2020-10-25 22:31:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-25 22:31:20,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:20,499 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:20,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:20,714 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash -986598490, now seen corresponding path program 5 times [2020-10-25 22:31:20,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:20,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026445745] [2020-10-25 22:31:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2020-10-25 22:31:20,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026445745] [2020-10-25 22:31:20,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014195487] [2020-10-25 22:31:20,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:20,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-25 22:31:20,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:20,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 22:31:20,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-25 22:31:20,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:20,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 22:31:20,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213288136] [2020-10-25 22:31:20,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:31:20,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:31:20,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:31:20,984 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 8 states. [2020-10-25 22:31:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:21,022 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2020-10-25 22:31:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:31:21,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-10-25 22:31:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:21,024 INFO L225 Difference]: With dead ends: 234 [2020-10-25 22:31:21,024 INFO L226 Difference]: Without dead ends: 136 [2020-10-25 22:31:21,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:31:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-25 22:31:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-10-25 22:31:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-25 22:31:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2020-10-25 22:31:21,041 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 111 [2020-10-25 22:31:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:21,041 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2020-10-25 22:31:21,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:31:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2020-10-25 22:31:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-25 22:31:21,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:21,048 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:21,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-25 22:31:21,262 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:21,263 INFO L82 PathProgramCache]: Analyzing trace with hash -859525210, now seen corresponding path program 6 times [2020-10-25 22:31:21,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:21,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702719116] [2020-10-25 22:31:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2020-10-25 22:31:21,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702719116] [2020-10-25 22:31:21,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356197900] [2020-10-25 22:31:21,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:21,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-25 22:31:21,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:31:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-10-25 22:31:21,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:21,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-25 22:31:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426481842] [2020-10-25 22:31:21,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:31:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:31:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:31:21,567 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 9 states. [2020-10-25 22:31:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:21,614 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2020-10-25 22:31:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:31:21,615 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2020-10-25 22:31:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:21,616 INFO L225 Difference]: With dead ends: 256 [2020-10-25 22:31:21,616 INFO L226 Difference]: Without dead ends: 144 [2020-10-25 22:31:21,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:31:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-25 22:31:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-25 22:31:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-25 22:31:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2020-10-25 22:31:21,632 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 127 [2020-10-25 22:31:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:21,633 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2020-10-25 22:31:21,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:31:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2020-10-25 22:31:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-25 22:31:21,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:21,635 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:21,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:21,851 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1331145638, now seen corresponding path program 7 times [2020-10-25 22:31:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:21,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264529340] [2020-10-25 22:31:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-10-25 22:31:21,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264529340] [2020-10-25 22:31:21,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225983629] [2020-10-25 22:31:21,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:31:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-10-25 22:31:22,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:22,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-25 22:31:22,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409406978] [2020-10-25 22:31:22,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:31:22,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:22,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:31:22,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:31:22,108 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 6 states. [2020-10-25 22:31:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:22,150 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2020-10-25 22:31:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:31:22,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2020-10-25 22:31:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:22,152 INFO L225 Difference]: With dead ends: 369 [2020-10-25 22:31:22,152 INFO L226 Difference]: Without dead ends: 260 [2020-10-25 22:31:22,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:31:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-25 22:31:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2020-10-25 22:31:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-25 22:31:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2020-10-25 22:31:22,169 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 143 [2020-10-25 22:31:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:22,169 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2020-10-25 22:31:22,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:31:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2020-10-25 22:31:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-25 22:31:22,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:22,175 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:22,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:22,389 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:22,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1485965146, now seen corresponding path program 8 times [2020-10-25 22:31:22,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:22,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572441185] [2020-10-25 22:31:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-10-25 22:31:22,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572441185] [2020-10-25 22:31:22,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265922476] [2020-10-25 22:31:22,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:22,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:31:22,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:31:22,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-10-25 22:31:22,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:22,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-25 22:31:22,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456631456] [2020-10-25 22:31:22,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:31:22,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:22,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:31:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:31:22,766 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand 7 states. [2020-10-25 22:31:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:22,850 INFO L93 Difference]: Finished difference Result 474 states and 518 transitions. [2020-10-25 22:31:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:31:22,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-25 22:31:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:22,854 INFO L225 Difference]: With dead ends: 474 [2020-10-25 22:31:22,855 INFO L226 Difference]: Without dead ends: 320 [2020-10-25 22:31:22,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:31:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-25 22:31:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2020-10-25 22:31:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-25 22:31:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2020-10-25 22:31:22,885 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 203 [2020-10-25 22:31:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:22,886 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2020-10-25 22:31:22,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:31:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2020-10-25 22:31:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-25 22:31:22,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:22,894 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:23,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-25 22:31:23,107 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash 889851302, now seen corresponding path program 9 times [2020-10-25 22:31:23,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:23,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786899793] [2020-10-25 22:31:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2020-10-25 22:31:23,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786899793] [2020-10-25 22:31:23,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403294415] [2020-10-25 22:31:23,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:23,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-10-25 22:31:23,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:23,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 22:31:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2020-10-25 22:31:23,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:23,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 22:31:23,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557444550] [2020-10-25 22:31:23,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:31:23,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:23,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:31:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:31:23,602 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand 8 states. [2020-10-25 22:31:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:23,665 INFO L93 Difference]: Finished difference Result 579 states and 630 transitions. [2020-10-25 22:31:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:31:23,666 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 263 [2020-10-25 22:31:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:23,668 INFO L225 Difference]: With dead ends: 579 [2020-10-25 22:31:23,669 INFO L226 Difference]: Without dead ends: 380 [2020-10-25 22:31:23,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:31:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-25 22:31:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 324. [2020-10-25 22:31:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-25 22:31:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 350 transitions. [2020-10-25 22:31:23,693 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 350 transitions. Word has length 263 [2020-10-25 22:31:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:23,693 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 350 transitions. [2020-10-25 22:31:23,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:31:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 350 transitions. [2020-10-25 22:31:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-25 22:31:23,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:23,699 INFO L422 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:23,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:23,913 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:23,914 INFO L82 PathProgramCache]: Analyzing trace with hash -955282778, now seen corresponding path program 10 times [2020-10-25 22:31:23,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:23,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087220061] [2020-10-25 22:31:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-10-25 22:31:24,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087220061] [2020-10-25 22:31:24,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389106895] [2020-10-25 22:31:24,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:24,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:31:24,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:24,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:31:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-10-25 22:31:24,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:24,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-25 22:31:24,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257561946] [2020-10-25 22:31:24,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:31:24,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:24,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:31:24,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:31:24,555 INFO L87 Difference]: Start difference. First operand 324 states and 350 transitions. Second operand 9 states. [2020-10-25 22:31:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:24,624 INFO L93 Difference]: Finished difference Result 628 states and 682 transitions. [2020-10-25 22:31:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:31:24,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2020-10-25 22:31:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:24,628 INFO L225 Difference]: With dead ends: 628 [2020-10-25 22:31:24,628 INFO L226 Difference]: Without dead ends: 384 [2020-10-25 22:31:24,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:31:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-25 22:31:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2020-10-25 22:31:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-25 22:31:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 414 transitions. [2020-10-25 22:31:24,655 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 414 transitions. Word has length 323 [2020-10-25 22:31:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:24,656 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 414 transitions. [2020-10-25 22:31:24,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:31:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 414 transitions. [2020-10-25 22:31:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-10-25 22:31:24,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:24,663 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:24,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-25 22:31:24,878 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1217433690, now seen corresponding path program 11 times [2020-10-25 22:31:24,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:24,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220004483] [2020-10-25 22:31:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-10-25 22:31:25,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220004483] [2020-10-25 22:31:25,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819223169] [2020-10-25 22:31:25,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:25,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2020-10-25 22:31:25,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:31:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-10-25 22:31:25,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:25,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-25 22:31:25,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048346912] [2020-10-25 22:31:25,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:31:25,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:31:25,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:31:25,632 INFO L87 Difference]: Start difference. First operand 384 states and 414 transitions. Second operand 6 states. [2020-10-25 22:31:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:25,732 INFO L93 Difference]: Finished difference Result 948 states and 1023 transitions. [2020-10-25 22:31:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:31:25,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 383 [2020-10-25 22:31:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:25,737 INFO L225 Difference]: With dead ends: 948 [2020-10-25 22:31:25,738 INFO L226 Difference]: Without dead ends: 754 [2020-10-25 22:31:25,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:31:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-10-25 22:31:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 570. [2020-10-25 22:31:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-10-25 22:31:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 614 transitions. [2020-10-25 22:31:25,786 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 614 transitions. Word has length 383 [2020-10-25 22:31:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:25,786 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 614 transitions. [2020-10-25 22:31:25,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:31:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 614 transitions. [2020-10-25 22:31:25,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2020-10-25 22:31:25,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:25,800 INFO L422 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-25 22:31:26,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-25 22:31:26,015 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 267351982, now seen corresponding path program 12 times [2020-10-25 22:31:26,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:26,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544490534] [2020-10-25 22:31:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2020-10-25 22:31:26,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544490534] [2020-10-25 22:31:26,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585037557] [2020-10-25 22:31:26,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:27,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2020-10-25 22:31:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:31:27,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2020-10-25 22:31:27,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:27,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-25 22:31:27,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855670513] [2020-10-25 22:31:27,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:31:27,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:27,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:31:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:31:27,462 INFO L87 Difference]: Start difference. First operand 570 states and 614 transitions. Second operand 9 states. [2020-10-25 22:31:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:27,844 INFO L93 Difference]: Finished difference Result 2160 states and 2331 transitions. [2020-10-25 22:31:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-25 22:31:27,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 569 [2020-10-25 22:31:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:27,855 INFO L225 Difference]: With dead ends: 2160 [2020-10-25 22:31:27,855 INFO L226 Difference]: Without dead ends: 1873 [2020-10-25 22:31:27,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-10-25 22:31:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-10-25 22:31:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1131. [2020-10-25 22:31:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-10-25 22:31:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1218 transitions. [2020-10-25 22:31:27,954 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1218 transitions. Word has length 569 [2020-10-25 22:31:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:27,954 INFO L481 AbstractCegarLoop]: Abstraction has 1131 states and 1218 transitions. [2020-10-25 22:31:27,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:31:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1218 transitions. [2020-10-25 22:31:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2020-10-25 22:31:28,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:28,003 INFO L422 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-25 22:31:28,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-25 22:31:28,218 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:28,219 INFO L82 PathProgramCache]: Analyzing trace with hash 550676450, now seen corresponding path program 13 times [2020-10-25 22:31:28,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:28,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048166100] [2020-10-25 22:31:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-10-25 22:31:29,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048166100] [2020-10-25 22:31:29,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789567610] [2020-10-25 22:31:29,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:30,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 22:31:30,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-10-25 22:31:31,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:31,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 22:31:31,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76324541] [2020-10-25 22:31:31,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:31:31,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:31:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:31:31,014 INFO L87 Difference]: Start difference. First operand 1131 states and 1218 transitions. Second operand 8 states. [2020-10-25 22:31:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:31,202 INFO L93 Difference]: Finished difference Result 2441 states and 2631 transitions. [2020-10-25 22:31:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:31:31,203 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1130 [2020-10-25 22:31:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:31,212 INFO L225 Difference]: With dead ends: 2441 [2020-10-25 22:31:31,213 INFO L226 Difference]: Without dead ends: 1686 [2020-10-25 22:31:31,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:31:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-10-25 22:31:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1410. [2020-10-25 22:31:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1410 states. [2020-10-25 22:31:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1518 transitions. [2020-10-25 22:31:31,331 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1518 transitions. Word has length 1130 [2020-10-25 22:31:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:31,332 INFO L481 AbstractCegarLoop]: Abstraction has 1410 states and 1518 transitions. [2020-10-25 22:31:31,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:31:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1518 transitions. [2020-10-25 22:31:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1410 [2020-10-25 22:31:31,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:31,351 INFO L422 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-25 22:31:31,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-25 22:31:31,565 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1545912050, now seen corresponding path program 14 times [2020-10-25 22:31:31,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:31,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848925213] [2020-10-25 22:31:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-10-25 22:31:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848925213] [2020-10-25 22:31:33,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421284043] [2020-10-25 22:31:33,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:34,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:31:34,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:31:34,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-10-25 22:31:35,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:31:35,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-25 22:31:35,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870036220] [2020-10-25 22:31:35,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:31:35,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:35,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:31:35,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:31:35,578 INFO L87 Difference]: Start difference. First operand 1410 states and 1518 transitions. Second operand 9 states. [2020-10-25 22:31:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:35,740 INFO L93 Difference]: Finished difference Result 2630 states and 2834 transitions. [2020-10-25 22:31:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:31:35,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1409 [2020-10-25 22:31:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:35,750 INFO L225 Difference]: With dead ends: 2630 [2020-10-25 22:31:35,750 INFO L226 Difference]: Without dead ends: 1689 [2020-10-25 22:31:35,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:31:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2020-10-25 22:31:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2020-10-25 22:31:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2020-10-25 22:31:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 1818 transitions. [2020-10-25 22:31:35,869 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 1818 transitions. Word has length 1409 [2020-10-25 22:31:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:35,870 INFO L481 AbstractCegarLoop]: Abstraction has 1689 states and 1818 transitions. [2020-10-25 22:31:35,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:31:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 1818 transitions. [2020-10-25 22:31:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-10-25 22:31:35,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:31:35,896 INFO L422 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-25 22:31:36,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:36,112 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:31:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:31:36,113 INFO L82 PathProgramCache]: Analyzing trace with hash -477789726, now seen corresponding path program 15 times [2020-10-25 22:31:36,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:31:36,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402465435] [2020-10-25 22:31:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:31:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:31:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2020-10-25 22:31:40,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402465435] [2020-10-25 22:31:40,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459290042] [2020-10-25 22:31:40,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:41,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2020-10-25 22:31:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:31:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 22:31:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:31:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242798 proven. 0 refuted. 0 times theorem prover too weak. 266245 trivial. 0 not checked. [2020-10-25 22:31:43,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 22:31:43,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2020-10-25 22:31:43,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272737695] [2020-10-25 22:31:43,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 22:31:43,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:31:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 22:31:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-25 22:31:43,372 INFO L87 Difference]: Start difference. First operand 1689 states and 1818 transitions. Second operand 14 states. [2020-10-25 22:31:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:31:43,626 INFO L93 Difference]: Finished difference Result 1689 states and 1818 transitions. [2020-10-25 22:31:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 22:31:43,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1688 [2020-10-25 22:31:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:31:43,630 INFO L225 Difference]: With dead ends: 1689 [2020-10-25 22:31:43,630 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:31:43,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1693 GetRequests, 1677 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-25 22:31:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:31:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:31:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:31:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:31:43,636 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1688 [2020-10-25 22:31:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:31:43,637 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:31:43,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 22:31:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:31:43,637 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:31:43,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:31:43,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:31:44,328 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 43 [2020-10-25 22:31:56,158 WARN L193 SmtUtils]: Spent 11.82 s on a formula simplification. DAG size of input: 2361 DAG size of output: 436 [2020-10-25 22:32:00,329 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 416 DAG size of output: 11 [2020-10-25 22:32:00,428 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-10-25 22:32:00,428 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2020-10-25 22:32:00,428 INFO L270 CegarLoopResult]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~c~0)) [2020-10-25 22:32:00,428 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:32:00,428 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:32:00,428 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:32:00,429 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-10-25 22:32:00,429 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2020-10-25 22:32:00,429 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (<= 6 ULTIMATE.start_main_~d~0)) [2020-10-25 22:32:00,429 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:32:00,429 INFO L274 CegarLoopResult]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2020-10-25 22:32:00,429 INFO L270 CegarLoopResult]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (< ULTIMATE.start_main_~c~0 6)) [2020-10-25 22:32:00,430 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-25 22:32:00,430 INFO L277 CegarLoopResult]: At program point L34(lines 15 35) the Hoare annotation is: true [2020-10-25 22:32:00,430 INFO L274 CegarLoopResult]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2020-10-25 22:32:00,430 INFO L270 CegarLoopResult]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~b~0) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~a~0 7)) [2020-10-25 22:32:00,430 INFO L274 CegarLoopResult]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2020-10-25 22:32:00,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:32:00 BoogieIcfgContainer [2020-10-25 22:32:00,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:32:00,450 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:32:00,450 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:32:00,451 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:32:00,451 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:31:17" (3/4) ... [2020-10-25 22:32:00,455 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:32:00,466 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-25 22:32:00,466 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 22:32:00,466 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:32:00,466 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:32:00,505 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:32:00,506 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:32:00,507 INFO L168 Benchmark]: Toolchain (without parser) took 43611.09 ms. Allocated memory was 46.1 MB in the beginning and 3.2 GB in the end (delta: 3.1 GB). Free memory was 23.3 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 904.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:32:00,507 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 46.1 MB. Free memory is still 28.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:32:00,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.39 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 22.8 MB in the end (delta: -92.2 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:32:00,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.11 ms. Allocated memory is still 46.1 MB. Free memory was 22.8 MB in the beginning and 21.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:32:00,509 INFO L168 Benchmark]: Boogie Preprocessor took 25.48 ms. Allocated memory is still 46.1 MB. Free memory was 21.4 MB in the beginning and 20.4 MB in the end (delta: 970.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:32:00,509 INFO L168 Benchmark]: RCFGBuilder took 484.58 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.2 MB in the beginning and 30.9 MB in the end (delta: -10.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:32:00,510 INFO L168 Benchmark]: TraceAbstraction took 42704.54 ms. Allocated memory was 56.6 MB in the beginning and 3.2 GB in the end (delta: 3.1 GB). Free memory was 30.5 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2020-10-25 22:32:00,510 INFO L168 Benchmark]: Witness Printer took 55.46 ms. Allocated memory is still 3.2 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:32:00,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 46.1 MB. Free memory is still 28.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.39 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 22.8 MB in the end (delta: -92.2 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.11 ms. Allocated memory is still 46.1 MB. Free memory was 22.8 MB in the beginning and 21.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.48 ms. Allocated memory is still 46.1 MB. Free memory was 21.4 MB in the beginning and 20.4 MB in the end (delta: 970.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 484.58 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.2 MB in the beginning and 30.9 MB in the end (delta: -10.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 42704.54 ms. Allocated memory was 56.6 MB in the beginning and 3.2 GB in the end (delta: 3.1 GB). Free memory was 30.5 MB in the beginning and 2.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. * Witness Printer took 55.46 ms. Allocated memory is still 3.2 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((c < 7 && d < 7) && a < 6) && b < 6) && 6 <= d - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((d < 7 && a < 6) && b < 6) && c < 6 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((c < 7 && d < 7) && 6 <= d) && b < 7) && 6 <= b) && 6 <= c) && a < 7 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((c < 7 && d < 7) && a < 6) && 6 <= d) && b < 7) && 6 <= c - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.9s, OverallIterations: 20, TraceHistogramMax: 648, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 557 SDslu, 596 SDs, 0 SdLazy, 420 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6619 GetRequests, 6501 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1689occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 913 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 578085 FormulaSimplificationTreeSizeReduction, 12.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 21916 FormulaSimplificationTreeSizeReductionInter, 4.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 13057 NumberOfCodeBlocks, 11607 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13022 ConstructedInterpolants, 0 QuantifiedInterpolants, 27926649 SizeOfPredicates, 18 NumberOfNonLiveVariables, 8601 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 1935239/2423578 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...