./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/rangesum10.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c00c1225dae238bedea18c737f72ae44fea020a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 21:49:29,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 21:49:29,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 21:49:29,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 21:49:29,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 21:49:29,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 21:49:29,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 21:49:29,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 21:49:29,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 21:49:29,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 21:49:29,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 21:49:29,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 21:49:29,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 21:49:29,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 21:49:29,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 21:49:29,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 21:49:29,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 21:49:29,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 21:49:29,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 21:49:29,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 21:49:29,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 21:49:29,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 21:49:29,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 21:49:29,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 21:49:29,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 21:49:29,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 21:49:29,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 21:49:29,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 21:49:29,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 21:49:29,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 21:49:29,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 21:49:29,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 21:49:29,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 21:49:29,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 21:49:29,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 21:49:29,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 21:49:29,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 21:49:29,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 21:49:29,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 21:49:29,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 21:49:29,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 21:49:29,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 21:49:29,286 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 21:49:29,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 21:49:29,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 21:49:29,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 21:49:29,288 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 21:49:29,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 21:49:29,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 21:49:29,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 21:49:29,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 21:49:29,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 21:49:29,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 21:49:29,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 21:49:29,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 21:49:29,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 21:49:29,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 21:49:29,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 21:49:29,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 21:49:29,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 21:49:29,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 21:49:29,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 21:49:29,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 21:49:29,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:49:29,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 21:49:29,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 21:49:29,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 21:49:29,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 21:49:29,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 21:49:29,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 21:49:29,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 21:49:29,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 6c00c1225dae238bedea18c737f72ae44fea020a [2020-10-19 21:49:29,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 21:49:29,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 21:49:29,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 21:49:29,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 21:49:29,550 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 21:49:29,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-10-19 21:49:29,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7123848/7678ce5f78af4ecca57ff6cbba7d3f12/FLAGc37d8e40f [2020-10-19 21:49:30,112 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 21:49:30,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-10-19 21:49:30,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7123848/7678ce5f78af4ecca57ff6cbba7d3f12/FLAGc37d8e40f [2020-10-19 21:49:30,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc7123848/7678ce5f78af4ecca57ff6cbba7d3f12 [2020-10-19 21:49:30,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 21:49:30,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 21:49:30,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 21:49:30,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 21:49:30,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 21:49:30,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b085457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30, skipping insertion in model container [2020-10-19 21:49:30,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 21:49:30,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 21:49:30,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:49:30,762 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 21:49:30,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:49:30,807 INFO L208 MainTranslator]: Completed translation [2020-10-19 21:49:30,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30 WrapperNode [2020-10-19 21:49:30,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 21:49:30,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 21:49:30,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 21:49:30,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 21:49:30,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 21:49:30,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 21:49:30,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 21:49:30,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 21:49:30,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (1/1) ... [2020-10-19 21:49:30,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 21:49:30,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 21:49:30,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 21:49:30,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 21:49:30,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (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 [2020-10-19 21:49:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 21:49:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 21:49:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 21:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 21:49:30,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 21:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 21:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 21:49:31,385 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 21:49:31,386 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-10-19 21:49:31,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:49:31 BoogieIcfgContainer [2020-10-19 21:49:31,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 21:49:31,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 21:49:31,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 21:49:31,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 21:49:31,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 09:49:30" (1/3) ... [2020-10-19 21:49:31,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e423a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:49:31, skipping insertion in model container [2020-10-19 21:49:31,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:30" (2/3) ... [2020-10-19 21:49:31,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e423a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:49:31, skipping insertion in model container [2020-10-19 21:49:31,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:49:31" (3/3) ... [2020-10-19 21:49:31,396 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2020-10-19 21:49:31,408 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 21:49:31,415 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 21:49:31,427 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 21:49:31,450 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 21:49:31,451 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 21:49:31,451 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 21:49:31,451 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 21:49:31,451 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 21:49:31,452 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 21:49:31,452 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 21:49:31,452 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 21:49:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-19 21:49:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 21:49:31,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:31,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:31,482 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1570593938, now seen corresponding path program 1 times [2020-10-19 21:49:31,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:31,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184887342] [2020-10-19 21:49:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:49:31,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184887342] [2020-10-19 21:49:31,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:31,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 21:49:31,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662108924] [2020-10-19 21:49:31,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 21:49:31,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 21:49:31,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:49:31,666 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-19 21:49:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:31,683 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-10-19 21:49:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 21:49:31,685 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-10-19 21:49:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:31,695 INFO L225 Difference]: With dead ends: 58 [2020-10-19 21:49:31,696 INFO L226 Difference]: Without dead ends: 27 [2020-10-19 21:49:31,699 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 [2020-10-19 21:49:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-19 21:49:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-19 21:49:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 21:49:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-19 21:49:31,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-10-19 21:49:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:31,737 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-19 21:49:31,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 21:49:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-19 21:49:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 21:49:31,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:31,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:31,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 21:49:31,739 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash 813479325, now seen corresponding path program 1 times [2020-10-19 21:49:31,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:31,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903214200] [2020-10-19 21:49:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:31,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:31,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895069502] [2020-10-19 21:49:31,760 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 [2020-10-19 21:49:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:31,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 21:49:31,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:49:31,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903214200] [2020-10-19 21:49:31,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:31,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895069502] [2020-10-19 21:49:31,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:31,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 21:49:31,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347620709] [2020-10-19 21:49:31,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:31,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:31,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:49:31,923 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-10-19 21:49:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:31,948 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-10-19 21:49:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:31,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-19 21:49:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:31,950 INFO L225 Difference]: With dead ends: 52 [2020-10-19 21:49:31,950 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 21:49:31,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:49:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 21:49:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-19 21:49:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 21:49:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-19 21:49:31,958 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-10-19 21:49:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:31,958 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-19 21:49:31,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-19 21:49:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 21:49:31,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:31,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:32,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-19 21:49:32,176 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash -552235489, now seen corresponding path program 1 times [2020-10-19 21:49:32,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:32,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267067639] [2020-10-19 21:49:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:49:32,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267067639] [2020-10-19 21:49:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963218042] [2020-10-19 21:49:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:49:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 21:49:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 21:49:32,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:32,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-19 21:49:32,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534419855] [2020-10-19 21:49:32,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:32,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:32,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:32,359 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-10-19 21:49:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:32,419 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-10-19 21:49:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:32,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-19 21:49:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:32,421 INFO L225 Difference]: With dead ends: 59 [2020-10-19 21:49:32,421 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 21:49:32,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 21:49:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-19 21:49:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 21:49:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-19 21:49:32,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-10-19 21:49:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:32,428 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-19 21:49:32,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-19 21:49:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 21:49:32,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:32,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:32,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:32,643 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash -745215302, now seen corresponding path program 1 times [2020-10-19 21:49:32,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:32,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774491938] [2020-10-19 21:49:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-19 21:49:32,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774491938] [2020-10-19 21:49:32,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960902479] [2020-10-19 21:49:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:49:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 21:49:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:32,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:32,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-19 21:49:32,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734246418] [2020-10-19 21:49:32,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:32,800 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-10-19 21:49:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:32,816 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-19 21:49:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:32,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 21:49:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:32,818 INFO L225 Difference]: With dead ends: 48 [2020-10-19 21:49:32,818 INFO L226 Difference]: Without dead ends: 36 [2020-10-19 21:49:32,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-19 21:49:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-19 21:49:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-19 21:49:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-19 21:49:32,825 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2020-10-19 21:49:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:32,826 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-19 21:49:32,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:32,826 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-19 21:49:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 21:49:32,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:32,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:33,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:33,043 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1253041416, now seen corresponding path program 1 times [2020-10-19 21:49:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:33,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012559670] [2020-10-19 21:49:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:33,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012559670] [2020-10-19 21:49:33,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109331078] [2020-10-19 21:49:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:49:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 21:49:33,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:33,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-19 21:49:33,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285458692] [2020-10-19 21:49:33,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:33,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:33,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:33,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:33,193 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 3 states. [2020-10-19 21:49:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:33,374 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2020-10-19 21:49:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:33,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-19 21:49:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:33,378 INFO L225 Difference]: With dead ends: 81 [2020-10-19 21:49:33,378 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 21:49:33,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 21:49:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-19 21:49:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-19 21:49:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-10-19 21:49:33,390 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2020-10-19 21:49:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:33,391 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-10-19 21:49:33,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-10-19 21:49:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 21:49:33,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:33,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:33,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:33,598 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:33,599 INFO L82 PathProgramCache]: Analyzing trace with hash -828492548, now seen corresponding path program 1 times [2020-10-19 21:49:33,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:33,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565651854] [2020-10-19 21:49:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:33,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565651854] [2020-10-19 21:49:33,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509802672] [2020-10-19 21:49:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:49:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:33,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:33,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:33,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:49:33,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-19 21:49:33,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186294583] [2020-10-19 21:49:33,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:49:33,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:49:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:33,745 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 5 states. [2020-10-19 21:49:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:33,769 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-10-19 21:49:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:33,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-19 21:49:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:33,771 INFO L225 Difference]: With dead ends: 92 [2020-10-19 21:49:33,771 INFO L226 Difference]: Without dead ends: 50 [2020-10-19 21:49:33,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-19 21:49:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-19 21:49:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-19 21:49:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-10-19 21:49:33,779 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 31 [2020-10-19 21:49:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:33,779 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-10-19 21:49:33,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:49:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-10-19 21:49:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 21:49:33,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:33,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:33,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-19 21:49:33,996 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1808056250, now seen corresponding path program 2 times [2020-10-19 21:49:33,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:33,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588423569] [2020-10-19 21:49:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 21:49:34,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588423569] [2020-10-19 21:49:34,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093774061] [2020-10-19 21:49:34,058 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 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 [2020-10-19 21:49:34,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 21:49:34,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:34,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 21:49:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 21:49:34,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:34,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-10-19 21:49:34,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252860365] [2020-10-19 21:49:34,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 21:49:34,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 21:49:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:49:34,235 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-10-19 21:49:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:34,362 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-19 21:49:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 21:49:34,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-19 21:49:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:34,365 INFO L225 Difference]: With dead ends: 120 [2020-10-19 21:49:34,365 INFO L226 Difference]: Without dead ends: 114 [2020-10-19 21:49:34,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-19 21:49:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2020-10-19 21:49:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-19 21:49:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-10-19 21:49:34,378 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 33 [2020-10-19 21:49:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:34,379 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-10-19 21:49:34,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 21:49:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-10-19 21:49:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 21:49:34,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:34,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:34,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:34,594 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash -883385759, now seen corresponding path program 1 times [2020-10-19 21:49:34,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:34,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013879947] [2020-10-19 21:49:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-19 21:49:34,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013879947] [2020-10-19 21:49:34,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244606269] [2020-10-19 21:49:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-19 21:49:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:49:34,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 21:49:34,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:49:34,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-19 21:49:34,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656615608] [2020-10-19 21:49:34,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 21:49:34,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 21:49:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:34,767 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2020-10-19 21:49:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:34,867 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-10-19 21:49:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 21:49:34,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-19 21:49:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:34,871 INFO L225 Difference]: With dead ends: 164 [2020-10-19 21:49:34,871 INFO L226 Difference]: Without dead ends: 97 [2020-10-19 21:49:34,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-19 21:49:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-10-19 21:49:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-19 21:49:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-10-19 21:49:34,884 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 36 [2020-10-19 21:49:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:34,884 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-10-19 21:49:34,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 21:49:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-10-19 21:49:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-19 21:49:34,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:34,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:35,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:35,101 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash 984846308, now seen corresponding path program 2 times [2020-10-19 21:49:35,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:35,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332218851] [2020-10-19 21:49:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:35,120 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:35,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811296994] [2020-10-19 21:49:35,121 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 [2020-10-19 21:49:35,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 21:49:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-19 21:49:35,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332218851] [2020-10-19 21:49:35,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:35,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811296994] [2020-10-19 21:49:35,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:35,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-19 21:49:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144916525] [2020-10-19 21:49:35,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:49:35,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:35,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:49:35,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:35,253 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 6 states. [2020-10-19 21:49:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:35,278 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-10-19 21:49:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 21:49:35,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-19 21:49:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:35,280 INFO L225 Difference]: With dead ends: 176 [2020-10-19 21:49:35,280 INFO L226 Difference]: Without dead ends: 94 [2020-10-19 21:49:35,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-19 21:49:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-19 21:49:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-19 21:49:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-10-19 21:49:35,290 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 47 [2020-10-19 21:49:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:35,290 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-10-19 21:49:35,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:49:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-10-19 21:49:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-19 21:49:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:35,293 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:35,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-19 21:49:35,509 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash 999874210, now seen corresponding path program 3 times [2020-10-19 21:49:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:35,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21902110] [2020-10-19 21:49:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-19 21:49:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21902110] [2020-10-19 21:49:35,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:35,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 21:49:35,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508490476] [2020-10-19 21:49:35,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:49:35,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:49:35,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:35,560 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2020-10-19 21:49:35,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:35,637 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-19 21:49:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:35,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-19 21:49:35,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:35,639 INFO L225 Difference]: With dead ends: 179 [2020-10-19 21:49:35,639 INFO L226 Difference]: Without dead ends: 109 [2020-10-19 21:49:35,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-19 21:49:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-10-19 21:49:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-19 21:49:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-19 21:49:35,649 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 49 [2020-10-19 21:49:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:35,650 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-19 21:49:35,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:49:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-19 21:49:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-19 21:49:35,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:35,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:35,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 21:49:35,652 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1208175976, now seen corresponding path program 1 times [2020-10-19 21:49:35,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:35,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504003242] [2020-10-19 21:49:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:35,664 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:35,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142807231] [2020-10-19 21:49:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:49:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 21:49:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-19 21:49:35,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504003242] [2020-10-19 21:49:35,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:35,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142807231] [2020-10-19 21:49:35,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:35,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 21:49:35,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986248577] [2020-10-19 21:49:35,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 21:49:35,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 21:49:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:35,815 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 7 states. [2020-10-19 21:49:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:35,845 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-10-19 21:49:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 21:49:35,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-19 21:49:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:35,847 INFO L225 Difference]: With dead ends: 160 [2020-10-19 21:49:35,847 INFO L226 Difference]: Without dead ends: 87 [2020-10-19 21:49:35,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-19 21:49:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-19 21:49:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-19 21:49:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-10-19 21:49:35,859 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2020-10-19 21:49:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:35,859 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-10-19 21:49:35,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 21:49:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-10-19 21:49:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-19 21:49:35,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:35,864 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:36,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:36,078 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash -394370218, now seen corresponding path program 2 times [2020-10-19 21:49:36,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:36,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379643455] [2020-10-19 21:49:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:36,092 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:36,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137050721] [2020-10-19 21:49:36,093 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 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 [2020-10-19 21:49:36,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:36,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:36,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 21:49:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-19 21:49:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379643455] [2020-10-19 21:49:36,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:36,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137050721] [2020-10-19 21:49:36,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:36,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-19 21:49:36,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794056414] [2020-10-19 21:49:36,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 21:49:36,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:36,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 21:49:36,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 21:49:36,252 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 8 states. [2020-10-19 21:49:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:36,283 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-10-19 21:49:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 21:49:36,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-19 21:49:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:36,284 INFO L225 Difference]: With dead ends: 162 [2020-10-19 21:49:36,284 INFO L226 Difference]: Without dead ends: 89 [2020-10-19 21:49:36,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 21:49:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-19 21:49:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-19 21:49:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-19 21:49:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-19 21:49:36,291 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 57 [2020-10-19 21:49:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:36,291 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-19 21:49:36,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 21:49:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-19 21:49:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-19 21:49:36,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:36,292 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:36,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:36,500 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -11084652, now seen corresponding path program 3 times [2020-10-19 21:49:36,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:36,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203787780] [2020-10-19 21:49:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:36,534 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:36,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223215094] [2020-10-19 21:49:36,535 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 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 [2020-10-19 21:49:36,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 21:49:36,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:36,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:36,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-19 21:49:36,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203787780] [2020-10-19 21:49:36,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:36,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223215094] [2020-10-19 21:49:36,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:36,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 21:49:36,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024991554] [2020-10-19 21:49:36,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:49:36,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:36,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:49:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:36,742 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 4 states. [2020-10-19 21:49:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:36,784 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-19 21:49:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:36,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-19 21:49:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:36,786 INFO L225 Difference]: With dead ends: 118 [2020-10-19 21:49:36,786 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 21:49:36,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 21:49:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-10-19 21:49:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 21:49:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-19 21:49:36,791 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 59 [2020-10-19 21:49:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:36,791 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-19 21:49:36,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:49:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-19 21:49:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-19 21:49:36,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:36,794 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:36,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-19 21:49:36,995 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -433786478, now seen corresponding path program 1 times [2020-10-19 21:49:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:36,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554183598] [2020-10-19 21:49:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:37,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:37,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841796527] [2020-10-19 21:49:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:49:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:37,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 21:49:37,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-19 21:49:37,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554183598] [2020-10-19 21:49:37,159 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:37,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841796527] [2020-10-19 21:49:37,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:37,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-19 21:49:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306703911] [2020-10-19 21:49:37,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 21:49:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:37,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 21:49:37,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-19 21:49:37,163 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 9 states. [2020-10-19 21:49:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:37,200 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-19 21:49:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 21:49:37,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-19 21:49:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:37,201 INFO L225 Difference]: With dead ends: 108 [2020-10-19 21:49:37,202 INFO L226 Difference]: Without dead ends: 63 [2020-10-19 21:49:37,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-19 21:49:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-19 21:49:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-19 21:49:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 21:49:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-19 21:49:37,206 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 59 [2020-10-19 21:49:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:37,206 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-19 21:49:37,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 21:49:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-19 21:49:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-19 21:49:37,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:37,207 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:37,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 21:49:37,413 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1463545008, now seen corresponding path program 2 times [2020-10-19 21:49:37,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:37,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765716207] [2020-10-19 21:49:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:37,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:37,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243661199] [2020-10-19 21:49:37,435 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 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 [2020-10-19 21:49:37,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:37,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 21:49:37,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-19 21:49:37,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765716207] [2020-10-19 21:49:37,759 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:37,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243661199] [2020-10-19 21:49:37,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:37,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-19 21:49:37,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965461973] [2020-10-19 21:49:37,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 21:49:37,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:37,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 21:49:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:49:37,762 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 10 states. [2020-10-19 21:49:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:37,810 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-19 21:49:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 21:49:37,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-19 21:49:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:37,811 INFO L225 Difference]: With dead ends: 110 [2020-10-19 21:49:37,811 INFO L226 Difference]: Without dead ends: 65 [2020-10-19 21:49:37,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:49:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-19 21:49:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-19 21:49:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-19 21:49:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-19 21:49:37,822 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2020-10-19 21:49:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:37,822 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-19 21:49:37,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 21:49:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-19 21:49:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-19 21:49:37,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:37,823 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:38,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 21:49:38,037 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1075953038, now seen corresponding path program 3 times [2020-10-19 21:49:38,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:38,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499131125] [2020-10-19 21:49:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:38,051 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:38,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583328989] [2020-10-19 21:49:38,052 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 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 [2020-10-19 21:49:38,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 21:49:38,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:38,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:38,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-19 21:49:38,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499131125] [2020-10-19 21:49:38,134 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:38,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583328989] [2020-10-19 21:49:38,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:38,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-19 21:49:38,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201668869] [2020-10-19 21:49:38,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:49:38,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:38,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:49:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:38,136 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 4 states. [2020-10-19 21:49:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:38,153 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-19 21:49:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:38,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-19 21:49:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:38,155 INFO L225 Difference]: With dead ends: 84 [2020-10-19 21:49:38,155 INFO L226 Difference]: Without dead ends: 67 [2020-10-19 21:49:38,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-19 21:49:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-19 21:49:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-19 21:49:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-19 21:49:38,160 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2020-10-19 21:49:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:38,160 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-19 21:49:38,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:49:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-19 21:49:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-19 21:49:38,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:38,161 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:38,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:38,363 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1189377332, now seen corresponding path program 4 times [2020-10-19 21:49:38,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:38,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144289962] [2020-10-19 21:49:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:38,374 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:38,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455347708] [2020-10-19 21:49:38,375 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 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 [2020-10-19 21:49:38,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 21:49:38,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:49:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-19 21:49:38,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144289962] [2020-10-19 21:49:38,462 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:38,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455347708] [2020-10-19 21:49:38,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:38,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-19 21:49:38,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442881662] [2020-10-19 21:49:38,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:49:38,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:38,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:49:38,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:38,465 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2020-10-19 21:49:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:38,546 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-10-19 21:49:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:49:38,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-19 21:49:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:38,548 INFO L225 Difference]: With dead ends: 119 [2020-10-19 21:49:38,548 INFO L226 Difference]: Without dead ends: 78 [2020-10-19 21:49:38,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-19 21:49:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-19 21:49:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-19 21:49:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-10-19 21:49:38,555 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 65 [2020-10-19 21:49:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:38,555 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-10-19 21:49:38,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:49:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-10-19 21:49:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-19 21:49:38,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:38,557 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:38,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 21:49:38,772 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1276239541, now seen corresponding path program 5 times [2020-10-19 21:49:38,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:38,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555749628] [2020-10-19 21:49:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:38,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:38,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735413788] [2020-10-19 21:49:38,792 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:38,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-19 21:49:38,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 21:49:38,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-19 21:49:38,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555749628] [2020-10-19 21:49:38,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:38,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735413788] [2020-10-19 21:49:38,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:38,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-19 21:49:38,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471726013] [2020-10-19 21:49:38,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:49:38,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:49:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:38,921 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 6 states. [2020-10-19 21:49:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:39,019 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2020-10-19 21:49:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 21:49:39,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-19 21:49:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:39,020 INFO L225 Difference]: With dead ends: 134 [2020-10-19 21:49:39,020 INFO L226 Difference]: Without dead ends: 87 [2020-10-19 21:49:39,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-19 21:49:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-10-19 21:49:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-19 21:49:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-19 21:49:39,026 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 74 [2020-10-19 21:49:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:39,026 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-19 21:49:39,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:49:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-19 21:49:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-19 21:49:39,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:39,028 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:39,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 21:49:39,239 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash 330377580, now seen corresponding path program 6 times [2020-10-19 21:49:39,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:39,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641561583] [2020-10-19 21:49:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:39,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:39,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508939601] [2020-10-19 21:49:39,253 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:39,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-19 21:49:39,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:39,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:49:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-19 21:49:39,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641561583] [2020-10-19 21:49:39,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:39,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508939601] [2020-10-19 21:49:39,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:39,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-19 21:49:39,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456913392] [2020-10-19 21:49:39,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:49:39,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:39,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:49:39,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:39,536 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 5 states. [2020-10-19 21:49:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:39,561 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-10-19 21:49:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:49:39,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-19 21:49:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:39,563 INFO L225 Difference]: With dead ends: 110 [2020-10-19 21:49:39,563 INFO L226 Difference]: Without dead ends: 87 [2020-10-19 21:49:39,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-19 21:49:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-19 21:49:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-19 21:49:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-19 21:49:39,569 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 83 [2020-10-19 21:49:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:39,570 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-19 21:49:39,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:49:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-19 21:49:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-19 21:49:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:39,571 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:39,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:39,781 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:39,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1018548394, now seen corresponding path program 7 times [2020-10-19 21:49:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:39,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229624000] [2020-10-19 21:49:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:39,793 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:39,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445032681] [2020-10-19 21:49:39,794 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:39,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 21:49:39,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-19 21:49:39,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229624000] [2020-10-19 21:49:39,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:39,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445032681] [2020-10-19 21:49:39,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:39,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-19 21:49:39,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964569936] [2020-10-19 21:49:39,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 21:49:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 21:49:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:39,979 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 11 states. [2020-10-19 21:49:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:40,017 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-10-19 21:49:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 21:49:40,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-19 21:49:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:40,020 INFO L225 Difference]: With dead ends: 156 [2020-10-19 21:49:40,020 INFO L226 Difference]: Without dead ends: 89 [2020-10-19 21:49:40,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-19 21:49:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-19 21:49:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-19 21:49:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-19 21:49:40,026 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 85 [2020-10-19 21:49:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:40,027 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-19 21:49:40,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 21:49:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-19 21:49:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-19 21:49:40,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:40,028 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:40,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:40,242 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash -471326488, now seen corresponding path program 8 times [2020-10-19 21:49:40,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:40,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750150411] [2020-10-19 21:49:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:40,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:40,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032346071] [2020-10-19 21:49:40,261 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:40,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:40,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 21:49:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-19 21:49:40,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750150411] [2020-10-19 21:49:40,433 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:40,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032346071] [2020-10-19 21:49:40,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:40,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-19 21:49:40,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512164996] [2020-10-19 21:49:40,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 21:49:40,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:40,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 21:49:40,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-19 21:49:40,435 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-10-19 21:49:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:40,481 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2020-10-19 21:49:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 21:49:40,482 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-19 21:49:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:40,483 INFO L225 Difference]: With dead ends: 157 [2020-10-19 21:49:40,483 INFO L226 Difference]: Without dead ends: 90 [2020-10-19 21:49:40,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-19 21:49:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-19 21:49:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-19 21:49:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-19 21:49:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-19 21:49:40,488 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 87 [2020-10-19 21:49:40,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:40,489 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-19 21:49:40,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 21:49:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-19 21:49:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-19 21:49:40,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:40,490 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:40,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:40,707 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2016978522, now seen corresponding path program 9 times [2020-10-19 21:49:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:40,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495455241] [2020-10-19 21:49:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:40,718 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:40,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148465418] [2020-10-19 21:49:40,719 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:40,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-19 21:49:40,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:40,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 21:49:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-19 21:49:40,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495455241] [2020-10-19 21:49:40,998 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:40,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148465418] [2020-10-19 21:49:40,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:40,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-19 21:49:40,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282883930] [2020-10-19 21:49:41,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:49:41,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:41,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:49:41,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:41,002 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 5 states. [2020-10-19 21:49:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:41,081 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-19 21:49:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:49:41,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-19 21:49:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:41,083 INFO L225 Difference]: With dead ends: 155 [2020-10-19 21:49:41,083 INFO L226 Difference]: Without dead ends: 105 [2020-10-19 21:49:41,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-19 21:49:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-10-19 21:49:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-19 21:49:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-19 21:49:41,089 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 89 [2020-10-19 21:49:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:41,089 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-19 21:49:41,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:49:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-19 21:49:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-19 21:49:41,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:41,091 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:41,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-19 21:49:41,303 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:41,304 INFO L82 PathProgramCache]: Analyzing trace with hash -751149159, now seen corresponding path program 10 times [2020-10-19 21:49:41,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:41,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706475314] [2020-10-19 21:49:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:41,316 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:41,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651909749] [2020-10-19 21:49:41,317 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:41,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 21:49:41,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:41,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 21:49:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-10-19 21:49:41,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706475314] [2020-10-19 21:49:41,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:41,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651909749] [2020-10-19 21:49:41,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:41,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 21:49:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276391263] [2020-10-19 21:49:41,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 21:49:41,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:41,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 21:49:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:41,420 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 7 states. [2020-10-19 21:49:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:41,539 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-10-19 21:49:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 21:49:41,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-19 21:49:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:41,541 INFO L225 Difference]: With dead ends: 175 [2020-10-19 21:49:41,541 INFO L226 Difference]: Without dead ends: 111 [2020-10-19 21:49:41,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-19 21:49:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-10-19 21:49:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-19 21:49:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-10-19 21:49:41,550 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 98 [2020-10-19 21:49:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:41,550 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-10-19 21:49:41,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 21:49:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-10-19 21:49:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-19 21:49:41,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:41,552 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:41,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-19 21:49:41,753 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:41,753 INFO L82 PathProgramCache]: Analyzing trace with hash -415195072, now seen corresponding path program 11 times [2020-10-19 21:49:41,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:41,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240282447] [2020-10-19 21:49:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:41,766 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:41,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099950546] [2020-10-19 21:49:41,766 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:41,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-19 21:49:41,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:41,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 21:49:41,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-10-19 21:49:42,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240282447] [2020-10-19 21:49:42,024 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099950546] [2020-10-19 21:49:42,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:42,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-19 21:49:42,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782623971] [2020-10-19 21:49:42,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 21:49:42,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 21:49:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 21:49:42,026 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 8 states. [2020-10-19 21:49:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:42,151 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2020-10-19 21:49:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 21:49:42,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2020-10-19 21:49:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:42,152 INFO L225 Difference]: With dead ends: 187 [2020-10-19 21:49:42,152 INFO L226 Difference]: Without dead ends: 117 [2020-10-19 21:49:42,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 21:49:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-19 21:49:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-19 21:49:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-19 21:49:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-10-19 21:49:42,158 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 107 [2020-10-19 21:49:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:42,158 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-10-19 21:49:42,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 21:49:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-10-19 21:49:42,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-19 21:49:42,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:42,160 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:42,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:42,361 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash -240955271, now seen corresponding path program 12 times [2020-10-19 21:49:42,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:42,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407406213] [2020-10-19 21:49:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:42,372 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:42,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012542506] [2020-10-19 21:49:42,373 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:42,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-19 21:49:42,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 21:49:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-19 21:49:42,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407406213] [2020-10-19 21:49:42,941 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:42,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012542506] [2020-10-19 21:49:42,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-19 21:49:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71805268] [2020-10-19 21:49:42,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:49:42,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:49:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:42,943 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 6 states. [2020-10-19 21:49:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:42,979 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-10-19 21:49:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 21:49:42,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-10-19 21:49:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:42,981 INFO L225 Difference]: With dead ends: 152 [2020-10-19 21:49:42,981 INFO L226 Difference]: Without dead ends: 120 [2020-10-19 21:49:42,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-19 21:49:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-19 21:49:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-19 21:49:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-10-19 21:49:42,987 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 116 [2020-10-19 21:49:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:42,987 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-10-19 21:49:42,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:49:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-10-19 21:49:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-19 21:49:42,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:42,989 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:43,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-19 21:49:43,194 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash 828658235, now seen corresponding path program 13 times [2020-10-19 21:49:43,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:43,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224466261] [2020-10-19 21:49:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:43,206 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:43,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291469642] [2020-10-19 21:49:43,207 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 21:49:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-19 21:49:43,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224466261] [2020-10-19 21:49:43,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:43,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291469642] [2020-10-19 21:49:43,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:43,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-19 21:49:43,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88856601] [2020-10-19 21:49:43,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 21:49:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:43,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 21:49:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:43,405 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 11 states. [2020-10-19 21:49:43,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:43,600 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2020-10-19 21:49:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 21:49:43,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 118 [2020-10-19 21:49:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:43,601 INFO L225 Difference]: With dead ends: 204 [2020-10-19 21:49:43,601 INFO L226 Difference]: Without dead ends: 134 [2020-10-19 21:49:43,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-19 21:49:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-10-19 21:49:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-19 21:49:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2020-10-19 21:49:43,609 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 118 [2020-10-19 21:49:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:43,609 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2020-10-19 21:49:43,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 21:49:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2020-10-19 21:49:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-19 21:49:43,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:43,610 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:43,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:43,811 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash -399032988, now seen corresponding path program 14 times [2020-10-19 21:49:43,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:43,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616157580] [2020-10-19 21:49:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:43,821 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:43,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087520939] [2020-10-19 21:49:43,822 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:44,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:44,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 21:49:44,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-10-19 21:49:44,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616157580] [2020-10-19 21:49:44,102 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:44,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087520939] [2020-10-19 21:49:44,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:44,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-19 21:49:44,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383172716] [2020-10-19 21:49:44,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 21:49:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 21:49:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-19 21:49:44,104 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand 12 states. [2020-10-19 21:49:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:44,293 INFO L93 Difference]: Finished difference Result 213 states and 240 transitions. [2020-10-19 21:49:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 21:49:44,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 127 [2020-10-19 21:49:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:44,295 INFO L225 Difference]: With dead ends: 213 [2020-10-19 21:49:44,295 INFO L226 Difference]: Without dead ends: 137 [2020-10-19 21:49:44,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-19 21:49:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-19 21:49:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-19 21:49:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-19 21:49:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2020-10-19 21:49:44,302 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 127 [2020-10-19 21:49:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:44,302 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2020-10-19 21:49:44,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 21:49:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2020-10-19 21:49:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-19 21:49:44,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:44,304 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:44,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-19 21:49:44,514 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:44,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1063535195, now seen corresponding path program 15 times [2020-10-19 21:49:44,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:44,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317564286] [2020-10-19 21:49:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:44,527 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:44,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405424282] [2020-10-19 21:49:44,528 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:45,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-19 21:49:45,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 21:49:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-19 21:49:45,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317564286] [2020-10-19 21:49:45,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:45,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405424282] [2020-10-19 21:49:45,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:45,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 21:49:45,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064349599] [2020-10-19 21:49:45,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 21:49:45,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 21:49:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:45,135 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand 7 states. [2020-10-19 21:49:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:45,160 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2020-10-19 21:49:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 21:49:45,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-10-19 21:49:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:45,162 INFO L225 Difference]: With dead ends: 178 [2020-10-19 21:49:45,162 INFO L226 Difference]: Without dead ends: 140 [2020-10-19 21:49:45,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-19 21:49:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-19 21:49:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-19 21:49:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2020-10-19 21:49:45,169 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 136 [2020-10-19 21:49:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:45,170 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2020-10-19 21:49:45,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 21:49:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2020-10-19 21:49:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-19 21:49:45,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:45,172 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:45,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-19 21:49:45,377 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1110768157, now seen corresponding path program 16 times [2020-10-19 21:49:45,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:45,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739436392] [2020-10-19 21:49:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:45,390 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:45,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100785817] [2020-10-19 21:49:45,391 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:45,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 21:49:45,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:45,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 21:49:45,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-19 21:49:45,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739436392] [2020-10-19 21:49:45,552 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:45,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100785817] [2020-10-19 21:49:45,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:45,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-19 21:49:45,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94228724] [2020-10-19 21:49:45,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 21:49:45,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:45,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 21:49:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 21:49:45,554 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand 8 states. [2020-10-19 21:49:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:45,580 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2020-10-19 21:49:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 21:49:45,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2020-10-19 21:49:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:45,581 INFO L225 Difference]: With dead ends: 180 [2020-10-19 21:49:45,581 INFO L226 Difference]: Without dead ends: 142 [2020-10-19 21:49:45,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-19 21:49:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-19 21:49:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-19 21:49:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-19 21:49:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 157 transitions. [2020-10-19 21:49:45,591 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 157 transitions. Word has length 138 [2020-10-19 21:49:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:45,592 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 157 transitions. [2020-10-19 21:49:45,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 21:49:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 157 transitions. [2020-10-19 21:49:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-19 21:49:45,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:45,593 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:45,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-19 21:49:45,807 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash -742995617, now seen corresponding path program 17 times [2020-10-19 21:49:45,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:45,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180403758] [2020-10-19 21:49:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:45,823 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:45,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532371239] [2020-10-19 21:49:45,824 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:46,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-19 21:49:46,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:46,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 21:49:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-19 21:49:46,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180403758] [2020-10-19 21:49:46,834 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:46,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532371239] [2020-10-19 21:49:46,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:46,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-19 21:49:46,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998787658] [2020-10-19 21:49:46,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 21:49:46,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 21:49:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-19 21:49:46,837 INFO L87 Difference]: Start difference. First operand 141 states and 157 transitions. Second operand 9 states. [2020-10-19 21:49:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:46,867 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2020-10-19 21:49:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 21:49:46,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2020-10-19 21:49:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:46,869 INFO L225 Difference]: With dead ends: 182 [2020-10-19 21:49:46,869 INFO L226 Difference]: Without dead ends: 144 [2020-10-19 21:49:46,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-19 21:49:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-19 21:49:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-19 21:49:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-19 21:49:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-10-19 21:49:46,875 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 140 [2020-10-19 21:49:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:46,876 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-10-19 21:49:46,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 21:49:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-10-19 21:49:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-19 21:49:46,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:46,877 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:47,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:47,092 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash 201445409, now seen corresponding path program 18 times [2020-10-19 21:49:47,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:47,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123477971] [2020-10-19 21:49:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:47,103 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:47,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256673558] [2020-10-19 21:49:47,103 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:48,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-19 21:49:48,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 21:49:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-19 21:49:48,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123477971] [2020-10-19 21:49:48,411 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:48,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256673558] [2020-10-19 21:49:48,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:48,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-19 21:49:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412092687] [2020-10-19 21:49:48,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 21:49:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 21:49:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:49:48,413 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 10 states. [2020-10-19 21:49:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:48,453 INFO L93 Difference]: Finished difference Result 184 states and 205 transitions. [2020-10-19 21:49:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 21:49:48,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 142 [2020-10-19 21:49:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:48,455 INFO L225 Difference]: With dead ends: 184 [2020-10-19 21:49:48,455 INFO L226 Difference]: Without dead ends: 146 [2020-10-19 21:49:48,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:49:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-19 21:49:48,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-19 21:49:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-19 21:49:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-10-19 21:49:48,461 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 142 [2020-10-19 21:49:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:48,462 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-10-19 21:49:48,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 21:49:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-10-19 21:49:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-19 21:49:48,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:48,463 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:48,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-19 21:49:48,672 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1571171939, now seen corresponding path program 19 times [2020-10-19 21:49:48,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:48,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975087313] [2020-10-19 21:49:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:48,686 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:48,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378643911] [2020-10-19 21:49:48,686 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:48,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 21:49:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-19 21:49:48,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975087313] [2020-10-19 21:49:48,863 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:48,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378643911] [2020-10-19 21:49:48,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:48,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-19 21:49:48,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040303803] [2020-10-19 21:49:48,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 21:49:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 21:49:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:48,865 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 11 states. [2020-10-19 21:49:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:48,909 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-19 21:49:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 21:49:48,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-10-19 21:49:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:48,912 INFO L225 Difference]: With dead ends: 185 [2020-10-19 21:49:48,912 INFO L226 Difference]: Without dead ends: 147 [2020-10-19 21:49:48,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-19 21:49:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-19 21:49:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-19 21:49:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2020-10-19 21:49:48,921 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 144 [2020-10-19 21:49:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:48,921 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2020-10-19 21:49:48,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 21:49:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2020-10-19 21:49:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-19 21:49:48,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:48,923 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:49,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:49,135 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:49,135 INFO L82 PathProgramCache]: Analyzing trace with hash -676592603, now seen corresponding path program 20 times [2020-10-19 21:49:49,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:49,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685537547] [2020-10-19 21:49:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:49,148 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:49,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927515858] [2020-10-19 21:49:49,149 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:49,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:49,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-19 21:49:49,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 21:49:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 21:49:49,936 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 21:49:50,137 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 21:49:50,137 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 21:49:50,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-19 21:49:50,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 09:49:50 BoogieIcfgContainer [2020-10-19 21:49:50,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 21:49:50,483 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 21:49:50,483 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 21:49:50,483 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 21:49:50,484 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:49:31" (3/4) ... [2020-10-19 21:49:50,486 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 21:49:50,593 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 21:49:50,593 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 21:49:50,595 INFO L168 Benchmark]: Toolchain (without parser) took 20113.45 ms. Allocated memory was 36.7 MB in the beginning and 91.2 MB in the end (delta: 54.5 MB). Free memory was 19.7 MB in the beginning and 19.4 MB in the end (delta: 341.6 kB). Peak memory consumption was 54.9 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,596 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 34.1 MB. Free memory was 12.1 MB in the beginning and 12.1 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.65 ms. Allocated memory was 36.7 MB in the beginning and 44.0 MB in the end (delta: 7.3 MB). Free memory was 18.8 MB in the beginning and 25.7 MB in the end (delta: -6.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.45 ms. Allocated memory is still 44.0 MB. Free memory was 25.7 MB in the beginning and 23.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,597 INFO L168 Benchmark]: Boogie Preprocessor took 36.56 ms. Allocated memory is still 44.0 MB. Free memory was 23.4 MB in the beginning and 21.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,598 INFO L168 Benchmark]: RCFGBuilder took 491.19 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 21.6 MB in the beginning and 15.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,598 INFO L168 Benchmark]: TraceAbstraction took 19093.37 ms. Allocated memory was 46.1 MB in the beginning and 91.2 MB in the end (delta: 45.1 MB). Free memory was 14.8 MB in the beginning and 32.1 MB in the end (delta: -17.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,599 INFO L168 Benchmark]: Witness Printer took 110.40 ms. Allocated memory is still 91.2 MB. Free memory was 32.1 MB in the beginning and 19.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:50,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 34.1 MB. Free memory was 12.1 MB in the beginning and 12.1 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 320.65 ms. Allocated memory was 36.7 MB in the beginning and 44.0 MB in the end (delta: 7.3 MB). Free memory was 18.8 MB in the beginning and 25.7 MB in the end (delta: -6.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 50.45 ms. Allocated memory is still 44.0 MB. Free memory was 25.7 MB in the beginning and 23.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 36.56 ms. Allocated memory is still 44.0 MB. Free memory was 23.4 MB in the beginning and 21.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 491.19 ms. Allocated memory was 44.0 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Free memory was 21.6 MB in the beginning and 15.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 19093.37 ms. Allocated memory was 46.1 MB in the beginning and 91.2 MB in the end (delta: 45.1 MB). Free memory was 14.8 MB in the beginning and 32.1 MB in the end (delta: -17.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 14.3 GB. * Witness Printer took 110.40 ms. Allocated memory is still 91.2 MB. Free memory was 32.1 MB in the beginning and 19.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L42] int x[10]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 10) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<10 -1) [L57] x[10 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "rangesum10.c", 18, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.8s, OverallIterations: 33, TraceHistogramMax: 10, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 983 SDtfs, 679 SDslu, 1437 SDs, 0 SdLazy, 956 SolverSat, 356 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2349 GetRequests, 2185 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 32 MinimizatonAttempts, 131 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 2741 NumberOfCodeBlocks, 2453 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 2557 ConstructedInterpolants, 0 QuantifiedInterpolants, 296487 SizeOfPredicates, 36 NumberOfNonLiveVariables, 6635 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 38 InterpolantComputations, 8 PerfectInterpolantSequences, 5483/6277 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 incorrect! Received shutdown request...