./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 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 0.2.0-5485861 [2020-10-25 19:03:46,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:03:46,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:03:46,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:03:46,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:03:46,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:03:46,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:03:46,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:03:46,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:03:46,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:03:46,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:03:46,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:03:46,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:03:46,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:03:46,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:03:46,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:03:46,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:03:46,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:03:46,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:03:46,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:03:46,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:03:46,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:03:46,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:03:46,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:03:46,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:03:46,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:03:46,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:03:46,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:03:46,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:03:46,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:03:46,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:03:46,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:03:46,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:03:46,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:03:46,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:03:46,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:03:46,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:03:46,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:03:46,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:03:46,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:03:46,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:03:46,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:03:46,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:03:46,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:03:46,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:03:46,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:03:46,709 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:03:46,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:03:46,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:03:46,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:03:46,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:03:46,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:03:46,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:03:46,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:03:46,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:03:46,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:03:46,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:03:46,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:03:46,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:03:46,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:03:46,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:03:46,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:03:46,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:03:46,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:03:46,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:03:46,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:03:46,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:03:46,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:03:46,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:03:46,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:03:46,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:03:46,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2020-10-25 19:03:47,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:03:47,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:03:47,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:03:47,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:03:47,234 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:03:47,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-10-25 19:03:47,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b10911b87/16e8926c2a5b445e884c3eadbafaf9a5/FLAGaab142db4 [2020-10-25 19:03:47,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:03:47,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-10-25 19:03:47,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b10911b87/16e8926c2a5b445e884c3eadbafaf9a5/FLAGaab142db4 [2020-10-25 19:03:48,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b10911b87/16e8926c2a5b445e884c3eadbafaf9a5 [2020-10-25 19:03:48,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:03:48,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:03:48,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:03:48,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:03:48,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:03:48,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ce8649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48, skipping insertion in model container [2020-10-25 19:03:48,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:03:48,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:03:48,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:03:48,508 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:03:48,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:03:48,554 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:03:48,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48 WrapperNode [2020-10-25 19:03:48,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:03:48,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:03:48,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:03:48,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:03:48,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:03:48,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:03:48,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:03:48,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:03:48,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... [2020-10-25 19:03:48,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:03:48,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:03:48,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:03:48,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:03:48,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:03:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:03:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:03:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:03:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:03:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:03:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:03:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 19:03:49,368 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:03:49,369 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-10-25 19:03:49,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:03:49 BoogieIcfgContainer [2020-10-25 19:03:49,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:03:49,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:03:49,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:03:49,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:03:49,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:03:48" (1/3) ... [2020-10-25 19:03:49,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40868b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:03:49, skipping insertion in model container [2020-10-25 19:03:49,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:03:48" (2/3) ... [2020-10-25 19:03:49,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40868b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:03:49, skipping insertion in model container [2020-10-25 19:03:49,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:03:49" (3/3) ... [2020-10-25 19:03:49,381 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2020-10-25 19:03:49,391 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:03:49,396 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:03:49,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:03:49,437 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:03:49,438 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:03:49,438 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:03:49,438 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:03:49,438 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:03:49,438 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:03:49,438 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:03:49,439 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:03:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-25 19:03:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:03:49,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:49,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:49,466 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1570593938, now seen corresponding path program 1 times [2020-10-25 19:03:49,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734584808] [2020-10-25 19:03:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:03:49,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734584808] [2020-10-25 19:03:49,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:49,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:03:49,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492758647] [2020-10-25 19:03:49,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:03:49,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:03:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:03:49,677 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-25 19:03:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:49,700 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-10-25 19:03:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:03:49,701 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-10-25 19:03:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:49,711 INFO L225 Difference]: With dead ends: 58 [2020-10-25 19:03:49,712 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 19:03:49,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:03:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 19:03:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-25 19:03:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-25 19:03:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-25 19:03:49,763 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-10-25 19:03:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:49,764 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-25 19:03:49,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:03:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-25 19:03:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:03:49,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:49,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:03:49,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:03:49,766 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 813479325, now seen corresponding path program 1 times [2020-10-25 19:03:49,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:49,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113581007] [2020-10-25 19:03:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:49,787 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:49,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786703941] [2020-10-25 19:03:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 19:03:49,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:03:49,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113581007] [2020-10-25 19:03:49,960 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:49,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786703941] [2020-10-25 19:03:49,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:49,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:03:49,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957233250] [2020-10-25 19:03:49,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:49,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:03:49,964 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-10-25 19:03:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:49,983 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-10-25 19:03:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:49,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:03:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:49,985 INFO L225 Difference]: With dead ends: 52 [2020-10-25 19:03:49,985 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 19:03:49,986 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 [2020-10-25 19:03:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 19:03:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-25 19:03:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 19:03:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-25 19:03:49,992 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-10-25 19:03:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:49,993 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-25 19:03:49,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-25 19:03:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:03:49,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:49,994 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] [2020-10-25 19:03:50,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 19:03:50,208 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash -552235489, now seen corresponding path program 1 times [2020-10-25 19:03:50,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:50,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560625293] [2020-10-25 19:03:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:03:50,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560625293] [2020-10-25 19:03:50,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140715846] [2020-10-25 19:03:50,304 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 [2020-10-25 19:03:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 19:03:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-25 19:03:50,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:50,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-25 19:03:50,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419697220] [2020-10-25 19:03:50,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:50,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:50,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:50,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:50,389 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-10-25 19:03:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:50,458 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-10-25 19:03:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:50,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-25 19:03:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:50,460 INFO L225 Difference]: With dead ends: 59 [2020-10-25 19:03:50,460 INFO L226 Difference]: Without dead ends: 37 [2020-10-25 19:03:50,461 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 [2020-10-25 19:03:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-25 19:03:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-25 19:03:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-25 19:03:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-25 19:03:50,468 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-10-25 19:03:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:50,469 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-25 19:03:50,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-25 19:03:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-25 19:03:50,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:50,471 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] [2020-10-25 19:03:50,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:50,688 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:50,690 INFO L82 PathProgramCache]: Analyzing trace with hash -745215302, now seen corresponding path program 1 times [2020-10-25 19:03:50,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:50,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307834092] [2020-10-25 19:03:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-25 19:03:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307834092] [2020-10-25 19:03:50,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181883165] [2020-10-25 19:03:50,753 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 [2020-10-25 19:03:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:50,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 19:03:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:50,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:50,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-25 19:03:50,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430253316] [2020-10-25 19:03:50,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:50,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:50,839 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-10-25 19:03:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:50,866 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-25 19:03:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:50,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-25 19:03:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:50,868 INFO L225 Difference]: With dead ends: 48 [2020-10-25 19:03:50,868 INFO L226 Difference]: Without dead ends: 36 [2020-10-25 19:03:50,869 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 [2020-10-25 19:03:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-25 19:03:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-25 19:03:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-25 19:03:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-25 19:03:50,875 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2020-10-25 19:03:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:50,875 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-25 19:03:50,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-25 19:03:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 19:03:50,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:50,877 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] [2020-10-25 19:03:51,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:51,092 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1253041416, now seen corresponding path program 1 times [2020-10-25 19:03:51,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:51,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111473259] [2020-10-25 19:03:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:51,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111473259] [2020-10-25 19:03:51,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056449253] [2020-10-25 19:03:51,144 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 [2020-10-25 19:03:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:51,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-25 19:03:51,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:51,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-25 19:03:51,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085278314] [2020-10-25 19:03:51,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:03:51,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:51,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:03:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:51,223 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 3 states. [2020-10-25 19:03:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:51,424 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2020-10-25 19:03:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:03:51,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-25 19:03:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:51,425 INFO L225 Difference]: With dead ends: 81 [2020-10-25 19:03:51,426 INFO L226 Difference]: Without dead ends: 58 [2020-10-25 19:03:51,426 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 [2020-10-25 19:03:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-25 19:03:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-25 19:03:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-25 19:03:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-10-25 19:03:51,434 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2020-10-25 19:03:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:51,434 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-10-25 19:03:51,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:03:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-10-25 19:03:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 19:03:51,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:51,435 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] [2020-10-25 19:03:51,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:51,650 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash -828492548, now seen corresponding path program 1 times [2020-10-25 19:03:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:51,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471469061] [2020-10-25 19:03:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:51,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471469061] [2020-10-25 19:03:51,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774985304] [2020-10-25 19:03:51,691 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 [2020-10-25 19:03:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:51,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 19:03:51,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 19:03:51,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-25 19:03:51,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250453017] [2020-10-25 19:03:51,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 19:03:51,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:51,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 19:03:51,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:51,779 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 5 states. [2020-10-25 19:03:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:51,802 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-10-25 19:03:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:51,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-25 19:03:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:51,813 INFO L225 Difference]: With dead ends: 92 [2020-10-25 19:03:51,813 INFO L226 Difference]: Without dead ends: 50 [2020-10-25 19:03:51,816 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 [2020-10-25 19:03:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-25 19:03:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-25 19:03:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-25 19:03:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-10-25 19:03:51,822 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 31 [2020-10-25 19:03:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:51,823 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-10-25 19:03:51,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 19:03:51,823 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-10-25 19:03:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-25 19:03:51,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:51,824 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] [2020-10-25 19:03:52,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 19:03:52,038 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1808056250, now seen corresponding path program 2 times [2020-10-25 19:03:52,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:52,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872779728] [2020-10-25 19:03:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 19:03:52,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872779728] [2020-10-25 19:03:52,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336232547] [2020-10-25 19:03:52,132 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 [2020-10-25 19:03:52,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-25 19:03:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 19:03:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-25 19:03:52,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:52,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-10-25 19:03:52,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275019833] [2020-10-25 19:03:52,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 19:03:52,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:52,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 19:03:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-25 19:03:52,284 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-10-25 19:03:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:52,389 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-25 19:03:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 19:03:52,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-25 19:03:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:52,391 INFO L225 Difference]: With dead ends: 120 [2020-10-25 19:03:52,392 INFO L226 Difference]: Without dead ends: 114 [2020-10-25 19:03:52,392 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 [2020-10-25 19:03:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-25 19:03:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2020-10-25 19:03:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-25 19:03:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-10-25 19:03:52,404 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 33 [2020-10-25 19:03:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:52,405 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-10-25 19:03:52,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 19:03:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-10-25 19:03:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-25 19:03:52,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:52,407 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] [2020-10-25 19:03:52,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:52,616 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:52,617 INFO L82 PathProgramCache]: Analyzing trace with hash -883385759, now seen corresponding path program 1 times [2020-10-25 19:03:52,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:52,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91951979] [2020-10-25 19:03:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-25 19:03:52,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91951979] [2020-10-25 19:03:52,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709551849] [2020-10-25 19:03:52,679 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 [2020-10-25 19:03:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 19:03:52,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-25 19:03:52,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 19:03:52,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-25 19:03:52,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838388890] [2020-10-25 19:03:52,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 19:03:52,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:52,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 19:03:52,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:52,785 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2020-10-25 19:03:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:52,933 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-10-25 19:03:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 19:03:52,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-25 19:03:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:52,936 INFO L225 Difference]: With dead ends: 164 [2020-10-25 19:03:52,937 INFO L226 Difference]: Without dead ends: 97 [2020-10-25 19:03:52,937 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 [2020-10-25 19:03:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-25 19:03:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-10-25 19:03:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-25 19:03:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-10-25 19:03:52,948 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 36 [2020-10-25 19:03:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:52,949 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-10-25 19:03:52,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 19:03:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-10-25 19:03:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-25 19:03:52,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:52,951 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] [2020-10-25 19:03:53,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:53,166 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash 984846308, now seen corresponding path program 2 times [2020-10-25 19:03:53,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:53,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877332872] [2020-10-25 19:03:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:53,191 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:53,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087146389] [2020-10-25 19:03:53,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:53,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:03:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 19:03:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-25 19:03:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877332872] [2020-10-25 19:03:53,369 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087146389] [2020-10-25 19:03:53,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:53,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-25 19:03:53,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18857418] [2020-10-25 19:03:53,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 19:03:53,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:53,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 19:03:53,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 19:03:53,371 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 6 states. [2020-10-25 19:03:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:53,404 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-10-25 19:03:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 19:03:53,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-25 19:03:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:53,406 INFO L225 Difference]: With dead ends: 176 [2020-10-25 19:03:53,406 INFO L226 Difference]: Without dead ends: 94 [2020-10-25 19:03:53,407 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 [2020-10-25 19:03:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-25 19:03:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-25 19:03:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-25 19:03:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-10-25 19:03:53,416 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 47 [2020-10-25 19:03:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:53,416 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-10-25 19:03:53,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 19:03:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-10-25 19:03:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-25 19:03:53,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:53,418 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] [2020-10-25 19:03:53,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-25 19:03:53,633 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash 999874210, now seen corresponding path program 3 times [2020-10-25 19:03:53,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:53,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989958946] [2020-10-25 19:03:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-25 19:03:53,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989958946] [2020-10-25 19:03:53,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:53,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:03:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986252270] [2020-10-25 19:03:53,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:03:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:03:53,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:53,739 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2020-10-25 19:03:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:53,853 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-25 19:03:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:53,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-25 19:03:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:53,854 INFO L225 Difference]: With dead ends: 179 [2020-10-25 19:03:53,855 INFO L226 Difference]: Without dead ends: 109 [2020-10-25 19:03:53,856 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 [2020-10-25 19:03:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-25 19:03:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-10-25 19:03:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-25 19:03:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-25 19:03:53,866 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 49 [2020-10-25 19:03:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:53,867 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-25 19:03:53,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:03:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-25 19:03:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-25 19:03:53,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:53,869 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] [2020-10-25 19:03:53,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-25 19:03:53,869 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1208175976, now seen corresponding path program 1 times [2020-10-25 19:03:53,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:53,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013341869] [2020-10-25 19:03:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:53,884 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:53,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463847302] [2020-10-25 19:03:53,885 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 [2020-10-25 19:03:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:53,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 19:03:53,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-25 19:03:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013341869] [2020-10-25 19:03:54,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463847302] [2020-10-25 19:03:54,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:54,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-25 19:03:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513693666] [2020-10-25 19:03:54,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 19:03:54,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 19:03:54,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:03:54,039 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 7 states. [2020-10-25 19:03:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:54,076 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-10-25 19:03:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 19:03:54,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-25 19:03:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:54,079 INFO L225 Difference]: With dead ends: 160 [2020-10-25 19:03:54,079 INFO L226 Difference]: Without dead ends: 87 [2020-10-25 19:03:54,080 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 [2020-10-25 19:03:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-25 19:03:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-25 19:03:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-25 19:03:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-10-25 19:03:54,087 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2020-10-25 19:03:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:54,088 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-10-25 19:03:54,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 19:03:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-10-25 19:03:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-25 19:03:54,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:54,090 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] [2020-10-25 19:03:54,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:54,304 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash -394370218, now seen corresponding path program 2 times [2020-10-25 19:03:54,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:54,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646047281] [2020-10-25 19:03:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:54,330 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:54,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407845693] [2020-10-25 19:03:54,331 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 [2020-10-25 19:03:54,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:03:54,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 19:03:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-25 19:03:54,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646047281] [2020-10-25 19:03:54,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:54,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407845693] [2020-10-25 19:03:54,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:54,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-25 19:03:54,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211023630] [2020-10-25 19:03:54,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 19:03:54,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 19:03:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 19:03:54,519 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 8 states. [2020-10-25 19:03:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:54,551 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2020-10-25 19:03:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 19:03:54,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-25 19:03:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:54,553 INFO L225 Difference]: With dead ends: 162 [2020-10-25 19:03:54,553 INFO L226 Difference]: Without dead ends: 89 [2020-10-25 19:03:54,554 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 [2020-10-25 19:03:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-25 19:03:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-25 19:03:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-25 19:03:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-25 19:03:54,561 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 57 [2020-10-25 19:03:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:54,562 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-25 19:03:54,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 19:03:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-25 19:03:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-25 19:03:54,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:54,564 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] [2020-10-25 19:03:54,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:54,776 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:54,777 INFO L82 PathProgramCache]: Analyzing trace with hash -11084652, now seen corresponding path program 3 times [2020-10-25 19:03:54,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:54,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117637331] [2020-10-25 19:03:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:54,803 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:54,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795022345] [2020-10-25 19:03:54,803 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 [2020-10-25 19:03:55,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-25 19:03:55,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:55,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:55,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-25 19:03:55,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117637331] [2020-10-25 19:03:55,050 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:55,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795022345] [2020-10-25 19:03:55,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:03:55,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:03:55,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240457211] [2020-10-25 19:03:55,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:03:55,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:55,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:03:55,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:55,053 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 4 states. [2020-10-25 19:03:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:55,110 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-25 19:03:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:55,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-25 19:03:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:55,115 INFO L225 Difference]: With dead ends: 118 [2020-10-25 19:03:55,115 INFO L226 Difference]: Without dead ends: 69 [2020-10-25 19:03:55,116 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 [2020-10-25 19:03:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-25 19:03:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-10-25 19:03:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-25 19:03:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-25 19:03:55,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 59 [2020-10-25 19:03:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:55,129 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-25 19:03:55,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:03:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-25 19:03:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-25 19:03:55,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:55,134 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] [2020-10-25 19:03:55,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-25 19:03:55,335 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -433786478, now seen corresponding path program 1 times [2020-10-25 19:03:55,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:55,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513143596] [2020-10-25 19:03:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:55,351 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:55,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211784243] [2020-10-25 19:03:55,352 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 [2020-10-25 19:03:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:55,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 19:03:55,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-25 19:03:55,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513143596] [2020-10-25 19:03:55,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:55,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211784243] [2020-10-25 19:03:55,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:55,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-25 19:03:55,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963456075] [2020-10-25 19:03:55,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 19:03:55,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 19:03:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 19:03:55,550 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 9 states. [2020-10-25 19:03:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:55,602 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-25 19:03:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 19:03:55,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-25 19:03:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:55,604 INFO L225 Difference]: With dead ends: 108 [2020-10-25 19:03:55,604 INFO L226 Difference]: Without dead ends: 63 [2020-10-25 19:03:55,606 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 [2020-10-25 19:03:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-25 19:03:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-25 19:03:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-25 19:03:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-25 19:03:55,617 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 59 [2020-10-25 19:03:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:55,617 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-25 19:03:55,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 19:03:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-25 19:03:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-25 19:03:55,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:55,620 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] [2020-10-25 19:03:55,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-25 19:03:55,835 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:55,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1463545008, now seen corresponding path program 2 times [2020-10-25 19:03:55,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:55,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396325560] [2020-10-25 19:03:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:55,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:55,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315495752] [2020-10-25 19:03:55,850 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 [2020-10-25 19:03:56,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:03:56,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 19:03:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-25 19:03:56,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396325560] [2020-10-25 19:03:56,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:56,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315495752] [2020-10-25 19:03:56,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:56,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-25 19:03:56,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668295546] [2020-10-25 19:03:56,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 19:03:56,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 19:03:56,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-25 19:03:56,197 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 10 states. [2020-10-25 19:03:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:56,246 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-25 19:03:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 19:03:56,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-25 19:03:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:56,247 INFO L225 Difference]: With dead ends: 110 [2020-10-25 19:03:56,248 INFO L226 Difference]: Without dead ends: 65 [2020-10-25 19:03:56,248 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 [2020-10-25 19:03:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-25 19:03:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-25 19:03:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-25 19:03:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-25 19:03:56,253 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2020-10-25 19:03:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:56,254 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-25 19:03:56,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 19:03:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-25 19:03:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-25 19:03:56,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:56,255 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] [2020-10-25 19:03:56,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-25 19:03:56,469 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1075953038, now seen corresponding path program 3 times [2020-10-25 19:03:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:56,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111027709] [2020-10-25 19:03:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:56,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:56,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777743122] [2020-10-25 19:03:56,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:56,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-25 19:03:56,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:56,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 19:03:56,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 19:03:56,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111027709] [2020-10-25 19:03:56,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:56,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777743122] [2020-10-25 19:03:56,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:56,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-25 19:03:56,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628844605] [2020-10-25 19:03:56,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:03:56,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:56,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:03:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:03:56,602 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 4 states. [2020-10-25 19:03:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:56,620 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-25 19:03:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:03:56,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-25 19:03:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:56,633 INFO L225 Difference]: With dead ends: 84 [2020-10-25 19:03:56,633 INFO L226 Difference]: Without dead ends: 67 [2020-10-25 19:03:56,634 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 [2020-10-25 19:03:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-25 19:03:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-25 19:03:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-25 19:03:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-25 19:03:56,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2020-10-25 19:03:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:56,639 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-25 19:03:56,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:03:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-25 19:03:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-25 19:03:56,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:56,640 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] [2020-10-25 19:03:56,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:56,851 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1189377332, now seen corresponding path program 4 times [2020-10-25 19:03:56,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:56,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89917683] [2020-10-25 19:03:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:56,867 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:56,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253407448] [2020-10-25 19:03:56,868 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 [2020-10-25 19:03:56,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 19:03:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:56,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 19:03:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-25 19:03:56,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89917683] [2020-10-25 19:03:56,963 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:56,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253407448] [2020-10-25 19:03:56,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:56,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-25 19:03:56,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024222540] [2020-10-25 19:03:56,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 19:03:56,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 19:03:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:56,965 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2020-10-25 19:03:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:57,044 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-10-25 19:03:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 19:03:57,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-25 19:03:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:57,045 INFO L225 Difference]: With dead ends: 119 [2020-10-25 19:03:57,045 INFO L226 Difference]: Without dead ends: 78 [2020-10-25 19:03:57,046 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 [2020-10-25 19:03:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-25 19:03:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-25 19:03:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-25 19:03:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-10-25 19:03:57,050 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 65 [2020-10-25 19:03:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:57,051 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-10-25 19:03:57,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 19:03:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-10-25 19:03:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-25 19:03:57,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:57,052 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] [2020-10-25 19:03:57,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-25 19:03:57,264 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:57,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1276239541, now seen corresponding path program 5 times [2020-10-25 19:03:57,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:57,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093900072] [2020-10-25 19:03:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:57,281 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:57,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102445152] [2020-10-25 19:03:57,281 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 [2020-10-25 19:03:57,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-25 19:03:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 19:03:57,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-25 19:03:57,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093900072] [2020-10-25 19:03:57,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:57,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102445152] [2020-10-25 19:03:57,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:57,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-25 19:03:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614757737] [2020-10-25 19:03:57,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 19:03:57,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:57,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 19:03:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 19:03:57,453 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 6 states. [2020-10-25 19:03:57,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:57,561 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2020-10-25 19:03:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 19:03:57,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-25 19:03:57,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:57,562 INFO L225 Difference]: With dead ends: 134 [2020-10-25 19:03:57,562 INFO L226 Difference]: Without dead ends: 87 [2020-10-25 19:03:57,565 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 [2020-10-25 19:03:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-25 19:03:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-10-25 19:03:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-25 19:03:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-25 19:03:57,573 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 74 [2020-10-25 19:03:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:57,573 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-25 19:03:57,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 19:03:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-25 19:03:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-25 19:03:57,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:57,575 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] [2020-10-25 19:03:57,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-25 19:03:57,775 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:57,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:57,776 INFO L82 PathProgramCache]: Analyzing trace with hash 330377580, now seen corresponding path program 6 times [2020-10-25 19:03:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:57,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639461996] [2020-10-25 19:03:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:57,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:57,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094577099] [2020-10-25 19:03:57,800 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 [2020-10-25 19:03:58,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-25 19:03:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 19:03:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-25 19:03:58,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639461996] [2020-10-25 19:03:58,073 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:58,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094577099] [2020-10-25 19:03:58,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:58,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-25 19:03:58,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836649851] [2020-10-25 19:03:58,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 19:03:58,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 19:03:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:58,075 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 5 states. [2020-10-25 19:03:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:58,110 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-10-25 19:03:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 19:03:58,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-25 19:03:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:58,111 INFO L225 Difference]: With dead ends: 110 [2020-10-25 19:03:58,112 INFO L226 Difference]: Without dead ends: 87 [2020-10-25 19:03:58,112 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 [2020-10-25 19:03:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-25 19:03:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-25 19:03:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-25 19:03:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-25 19:03:58,120 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 83 [2020-10-25 19:03:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:58,121 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-25 19:03:58,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 19:03:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-25 19:03:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-25 19:03:58,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:58,122 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] [2020-10-25 19:03:58,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:58,323 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1018548394, now seen corresponding path program 7 times [2020-10-25 19:03:58,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:58,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609061970] [2020-10-25 19:03:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:58,346 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:58,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611186786] [2020-10-25 19:03:58,347 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 [2020-10-25 19:03:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:03:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-25 19:03:58,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-25 19:03:58,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609061970] [2020-10-25 19:03:58,573 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:58,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611186786] [2020-10-25 19:03:58,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:58,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-25 19:03:58,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975682789] [2020-10-25 19:03:58,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 19:03:58,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 19:03:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-25 19:03:58,578 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 11 states. [2020-10-25 19:03:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:58,630 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-10-25 19:03:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 19:03:58,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-25 19:03:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:58,632 INFO L225 Difference]: With dead ends: 156 [2020-10-25 19:03:58,633 INFO L226 Difference]: Without dead ends: 89 [2020-10-25 19:03:58,633 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 [2020-10-25 19:03:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-25 19:03:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-25 19:03:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-25 19:03:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-25 19:03:58,640 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 85 [2020-10-25 19:03:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:58,640 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-25 19:03:58,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 19:03:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-25 19:03:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-25 19:03:58,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:58,642 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] [2020-10-25 19:03:58,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:58,855 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -471326488, now seen corresponding path program 8 times [2020-10-25 19:03:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:58,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373555013] [2020-10-25 19:03:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:58,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:58,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930778410] [2020-10-25 19:03:58,889 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 [2020-10-25 19:03:59,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:03:59,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:59,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 19:03:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-25 19:03:59,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373555013] [2020-10-25 19:03:59,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:59,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930778410] [2020-10-25 19:03:59,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:59,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-25 19:03:59,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289788529] [2020-10-25 19:03:59,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 19:03:59,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 19:03:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-25 19:03:59,150 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-10-25 19:03:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:59,201 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2020-10-25 19:03:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 19:03:59,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-25 19:03:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:59,202 INFO L225 Difference]: With dead ends: 157 [2020-10-25 19:03:59,202 INFO L226 Difference]: Without dead ends: 90 [2020-10-25 19:03:59,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-25 19:03:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-25 19:03:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-25 19:03:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-25 19:03:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-25 19:03:59,208 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 87 [2020-10-25 19:03:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:59,208 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-25 19:03:59,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 19:03:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-25 19:03:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-25 19:03:59,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:03:59,210 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] [2020-10-25 19:03:59,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:03:59,424 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:03:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:03:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2016978522, now seen corresponding path program 9 times [2020-10-25 19:03:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:03:59,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425104468] [2020-10-25 19:03:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:03:59,439 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:03:59,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386472866] [2020-10-25 19:03:59,440 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 [2020-10-25 19:03:59,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-25 19:03:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:03:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 19:03:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:03:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-25 19:03:59,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425104468] [2020-10-25 19:03:59,871 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:03:59,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386472866] [2020-10-25 19:03:59,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:03:59,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-25 19:03:59,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134095427] [2020-10-25 19:03:59,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 19:03:59,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:03:59,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 19:03:59,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:03:59,872 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 5 states. [2020-10-25 19:03:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:03:59,988 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-25 19:03:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 19:03:59,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-25 19:03:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:03:59,990 INFO L225 Difference]: With dead ends: 155 [2020-10-25 19:03:59,990 INFO L226 Difference]: Without dead ends: 105 [2020-10-25 19:03:59,991 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 [2020-10-25 19:03:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-25 19:03:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-10-25 19:03:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-25 19:03:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-25 19:03:59,998 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 89 [2020-10-25 19:03:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:03:59,999 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-25 19:03:59,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 19:03:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-25 19:04:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-25 19:04:00,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:00,000 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] [2020-10-25 19:04:00,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-25 19:04:00,202 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash -751149159, now seen corresponding path program 10 times [2020-10-25 19:04:00,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:00,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035299319] [2020-10-25 19:04:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:00,223 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:00,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546308943] [2020-10-25 19:04:00,228 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 [2020-10-25 19:04:00,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 19:04:00,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 19:04:00,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-10-25 19:04:00,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035299319] [2020-10-25 19:04:00,350 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:00,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546308943] [2020-10-25 19:04:00,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:00,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-25 19:04:00,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316005255] [2020-10-25 19:04:00,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 19:04:00,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:00,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 19:04:00,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:04:00,352 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 7 states. [2020-10-25 19:04:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:00,484 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2020-10-25 19:04:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 19:04:00,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-10-25 19:04:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:00,485 INFO L225 Difference]: With dead ends: 175 [2020-10-25 19:04:00,485 INFO L226 Difference]: Without dead ends: 111 [2020-10-25 19:04:00,486 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 [2020-10-25 19:04:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-25 19:04:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-10-25 19:04:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-25 19:04:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-10-25 19:04:00,493 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 98 [2020-10-25 19:04:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:00,493 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-10-25 19:04:00,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 19:04:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-10-25 19:04:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-25 19:04:00,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:00,495 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] [2020-10-25 19:04:00,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-25 19:04:00,695 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:00,696 INFO L82 PathProgramCache]: Analyzing trace with hash -415195072, now seen corresponding path program 11 times [2020-10-25 19:04:00,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:00,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397538156] [2020-10-25 19:04:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:00,727 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:00,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149071580] [2020-10-25 19:04:00,727 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 [2020-10-25 19:04:00,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-25 19:04:00,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:00,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 19:04:00,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-10-25 19:04:00,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397538156] [2020-10-25 19:04:00,985 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:00,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149071580] [2020-10-25 19:04:00,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:00,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-25 19:04:00,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308484593] [2020-10-25 19:04:00,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 19:04:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 19:04:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 19:04:00,989 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 8 states. [2020-10-25 19:04:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:01,152 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2020-10-25 19:04:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 19:04:01,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2020-10-25 19:04:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:01,153 INFO L225 Difference]: With dead ends: 187 [2020-10-25 19:04:01,153 INFO L226 Difference]: Without dead ends: 117 [2020-10-25 19:04:01,154 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 [2020-10-25 19:04:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-25 19:04:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-25 19:04:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-25 19:04:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-10-25 19:04:01,160 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 107 [2020-10-25 19:04:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:01,161 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-10-25 19:04:01,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 19:04:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-10-25 19:04:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-25 19:04:01,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:01,162 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] [2020-10-25 19:04:01,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:04:01,363 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash -240955271, now seen corresponding path program 12 times [2020-10-25 19:04:01,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:01,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012581312] [2020-10-25 19:04:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:01,379 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:01,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033116069] [2020-10-25 19:04:01,379 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 [2020-10-25 19:04:01,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-25 19:04:01,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:01,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 19:04:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-25 19:04:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012581312] [2020-10-25 19:04:02,048 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033116069] [2020-10-25 19:04:02,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:02,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-25 19:04:02,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786566552] [2020-10-25 19:04:02,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 19:04:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 19:04:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 19:04:02,050 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 6 states. [2020-10-25 19:04:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:02,078 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-10-25 19:04:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 19:04:02,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-10-25 19:04:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:02,080 INFO L225 Difference]: With dead ends: 152 [2020-10-25 19:04:02,080 INFO L226 Difference]: Without dead ends: 120 [2020-10-25 19:04:02,081 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 [2020-10-25 19:04:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-25 19:04:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-25 19:04:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-25 19:04:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-10-25 19:04:02,087 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 116 [2020-10-25 19:04:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:02,087 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-10-25 19:04:02,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 19:04:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-10-25 19:04:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-25 19:04:02,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:02,089 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] [2020-10-25 19:04:02,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-25 19:04:02,295 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:02,296 INFO L82 PathProgramCache]: Analyzing trace with hash 828658235, now seen corresponding path program 13 times [2020-10-25 19:04:02,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:02,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109472593] [2020-10-25 19:04:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:02,310 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:02,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173584395] [2020-10-25 19:04:02,310 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 [2020-10-25 19:04:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:04:02,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-25 19:04:02,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-25 19:04:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109472593] [2020-10-25 19:04:02,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:02,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173584395] [2020-10-25 19:04:02,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:02,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-25 19:04:02,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128716945] [2020-10-25 19:04:02,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 19:04:02,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 19:04:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-25 19:04:02,542 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 11 states. [2020-10-25 19:04:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:02,795 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2020-10-25 19:04:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 19:04:02,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 118 [2020-10-25 19:04:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:02,797 INFO L225 Difference]: With dead ends: 204 [2020-10-25 19:04:02,797 INFO L226 Difference]: Without dead ends: 134 [2020-10-25 19:04:02,798 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 [2020-10-25 19:04:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-25 19:04:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-10-25 19:04:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-25 19:04:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2020-10-25 19:04:02,806 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 118 [2020-10-25 19:04:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:02,806 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2020-10-25 19:04:02,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 19:04:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2020-10-25 19:04:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-25 19:04:02,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:02,808 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] [2020-10-25 19:04:03,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:04:03,023 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash -399032988, now seen corresponding path program 14 times [2020-10-25 19:04:03,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:03,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197055989] [2020-10-25 19:04:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:03,039 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:03,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493627664] [2020-10-25 19:04:03,040 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 [2020-10-25 19:04:03,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:04:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 19:04:03,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-10-25 19:04:03,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197055989] [2020-10-25 19:04:03,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:03,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493627664] [2020-10-25 19:04:03,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:03,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-25 19:04:03,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649177886] [2020-10-25 19:04:03,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 19:04:03,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:03,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 19:04:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-25 19:04:03,392 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand 12 states. [2020-10-25 19:04:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:03,644 INFO L93 Difference]: Finished difference Result 213 states and 240 transitions. [2020-10-25 19:04:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 19:04:03,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 127 [2020-10-25 19:04:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:03,645 INFO L225 Difference]: With dead ends: 213 [2020-10-25 19:04:03,645 INFO L226 Difference]: Without dead ends: 137 [2020-10-25 19:04:03,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-25 19:04:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-25 19:04:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-25 19:04:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-25 19:04:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2020-10-25 19:04:03,652 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 127 [2020-10-25 19:04:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:03,652 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2020-10-25 19:04:03,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 19:04:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2020-10-25 19:04:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-25 19:04:03,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:03,654 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] [2020-10-25 19:04:03,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-25 19:04:03,867 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:03,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1063535195, now seen corresponding path program 15 times [2020-10-25 19:04:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:03,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770805957] [2020-10-25 19:04:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:03,882 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:03,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166685133] [2020-10-25 19:04:03,882 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 [2020-10-25 19:04:04,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-25 19:04:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 19:04:04,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-25 19:04:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770805957] [2020-10-25 19:04:04,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166685133] [2020-10-25 19:04:04,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:04,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-25 19:04:04,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194807383] [2020-10-25 19:04:04,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 19:04:04,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 19:04:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 19:04:04,549 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand 7 states. [2020-10-25 19:04:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:04,581 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2020-10-25 19:04:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 19:04:04,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-10-25 19:04:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:04,585 INFO L225 Difference]: With dead ends: 178 [2020-10-25 19:04:04,585 INFO L226 Difference]: Without dead ends: 140 [2020-10-25 19:04:04,585 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 [2020-10-25 19:04:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-25 19:04:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-25 19:04:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-25 19:04:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2020-10-25 19:04:04,592 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 136 [2020-10-25 19:04:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:04,592 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2020-10-25 19:04:04,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 19:04:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2020-10-25 19:04:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-25 19:04:04,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:04,594 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] [2020-10-25 19:04:04,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-25 19:04:04,800 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1110768157, now seen corresponding path program 16 times [2020-10-25 19:04:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:04,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769605812] [2020-10-25 19:04:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:04,815 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:04,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314339503] [2020-10-25 19:04:04,815 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 [2020-10-25 19:04:04,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 19:04:04,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 19:04:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-25 19:04:05,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769605812] [2020-10-25 19:04:05,021 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:05,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314339503] [2020-10-25 19:04:05,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:05,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-25 19:04:05,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496724996] [2020-10-25 19:04:05,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 19:04:05,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:05,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 19:04:05,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 19:04:05,023 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand 8 states. [2020-10-25 19:04:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:05,064 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2020-10-25 19:04:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 19:04:05,065 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2020-10-25 19:04:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:05,066 INFO L225 Difference]: With dead ends: 180 [2020-10-25 19:04:05,066 INFO L226 Difference]: Without dead ends: 142 [2020-10-25 19:04:05,067 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 [2020-10-25 19:04:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-25 19:04:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-25 19:04:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-25 19:04:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 157 transitions. [2020-10-25 19:04:05,073 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 157 transitions. Word has length 138 [2020-10-25 19:04:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:05,074 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 157 transitions. [2020-10-25 19:04:05,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 19:04:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 157 transitions. [2020-10-25 19:04:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-25 19:04:05,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:05,075 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] [2020-10-25 19:04:05,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-25 19:04:05,290 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash -742995617, now seen corresponding path program 17 times [2020-10-25 19:04:05,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:05,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699612612] [2020-10-25 19:04:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:05,305 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:05,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835274509] [2020-10-25 19:04:05,305 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 [2020-10-25 19:04:06,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-25 19:04:06,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:06,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 19:04:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-25 19:04:06,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699612612] [2020-10-25 19:04:06,346 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:06,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835274509] [2020-10-25 19:04:06,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:06,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-25 19:04:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809280452] [2020-10-25 19:04:06,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 19:04:06,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 19:04:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 19:04:06,348 INFO L87 Difference]: Start difference. First operand 141 states and 157 transitions. Second operand 9 states. [2020-10-25 19:04:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:06,389 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2020-10-25 19:04:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 19:04:06,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2020-10-25 19:04:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:06,391 INFO L225 Difference]: With dead ends: 182 [2020-10-25 19:04:06,391 INFO L226 Difference]: Without dead ends: 144 [2020-10-25 19:04:06,392 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 [2020-10-25 19:04:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-25 19:04:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-25 19:04:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-25 19:04:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2020-10-25 19:04:06,398 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 140 [2020-10-25 19:04:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:06,399 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2020-10-25 19:04:06,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 19:04:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2020-10-25 19:04:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-25 19:04:06,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:06,400 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] [2020-10-25 19:04:06,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:04:06,615 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 201445409, now seen corresponding path program 18 times [2020-10-25 19:04:06,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:06,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411923176] [2020-10-25 19:04:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:06,629 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:06,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427038371] [2020-10-25 19:04:06,629 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 [2020-10-25 19:04:07,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-25 19:04:07,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 19:04:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 19:04:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-25 19:04:08,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411923176] [2020-10-25 19:04:08,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:08,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427038371] [2020-10-25 19:04:08,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:08,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-25 19:04:08,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633752982] [2020-10-25 19:04:08,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 19:04:08,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 19:04:08,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-25 19:04:08,088 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 10 states. [2020-10-25 19:04:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:08,138 INFO L93 Difference]: Finished difference Result 184 states and 205 transitions. [2020-10-25 19:04:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 19:04:08,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 142 [2020-10-25 19:04:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:08,140 INFO L225 Difference]: With dead ends: 184 [2020-10-25 19:04:08,140 INFO L226 Difference]: Without dead ends: 146 [2020-10-25 19:04:08,141 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 [2020-10-25 19:04:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-25 19:04:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-25 19:04:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-25 19:04:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-10-25 19:04:08,147 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 142 [2020-10-25 19:04:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:08,148 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-10-25 19:04:08,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 19:04:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-10-25 19:04:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-25 19:04:08,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:08,149 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] [2020-10-25 19:04:08,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-25 19:04:08,358 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:08,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1571171939, now seen corresponding path program 19 times [2020-10-25 19:04:08,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:08,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872580445] [2020-10-25 19:04:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:08,371 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:08,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558172013] [2020-10-25 19:04:08,371 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 [2020-10-25 19:04:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:04:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-25 19:04:08,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 19:04:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-25 19:04:08,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872580445] [2020-10-25 19:04:08,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-25 19:04:08,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558172013] [2020-10-25 19:04:08,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-25 19:04:08,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-25 19:04:08,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989808003] [2020-10-25 19:04:08,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 19:04:08,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:04:08,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 19:04:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-25 19:04:08,617 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 11 states. [2020-10-25 19:04:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:04:08,673 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-25 19:04:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 19:04:08,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-10-25 19:04:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:04:08,675 INFO L225 Difference]: With dead ends: 185 [2020-10-25 19:04:08,675 INFO L226 Difference]: Without dead ends: 147 [2020-10-25 19:04:08,675 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 [2020-10-25 19:04:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-25 19:04:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-25 19:04:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-25 19:04:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2020-10-25 19:04:08,682 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 144 [2020-10-25 19:04:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:04:08,682 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2020-10-25 19:04:08,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 19:04:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2020-10-25 19:04:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-25 19:04:08,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:04:08,683 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] [2020-10-25 19:04:08,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:04:08,898 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:04:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:04:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash -676592603, now seen corresponding path program 20 times [2020-10-25 19:04:08,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:04:08,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408714190] [2020-10-25 19:04:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:04:08,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:04:08,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580486992] [2020-10-25 19:04:08,914 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 [2020-10-25 19:04:09,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 19:04:09,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-25 19:04:09,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:04:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:04:09,847 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:04:10,099 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:04:10,099 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:04:10,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-25 19:04:10,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:04:10 BoogieIcfgContainer [2020-10-25 19:04:10,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:04:10,500 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:04:10,500 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:04:10,500 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:04:10,501 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:03:49" (3/4) ... [2020-10-25 19:04:10,505 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:04:10,644 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:04:10,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:04:10,646 INFO L168 Benchmark]: Toolchain (without parser) took 22407.25 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 24.7 MB in the beginning and 77.9 MB in the end (delta: -53.2 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:04:10,646 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 30.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:04:10,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.31 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 25.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:04:10,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.77 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 23.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:04:10,647 INFO L168 Benchmark]: Boogie Preprocessor took 34.86 ms. Allocated memory is still 48.2 MB. Free memory was 23.6 MB in the beginning and 22.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:04:10,648 INFO L168 Benchmark]: RCFGBuilder took 730.30 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 41.5 MB in the end (delta: -19.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:04:10,648 INFO L168 Benchmark]: TraceAbstraction took 21126.07 ms. Allocated memory was 58.7 MB in the beginning and 125.8 MB in the end (delta: 67.1 MB). Free memory was 41.0 MB in the beginning and 89.4 MB in the end (delta: -48.4 MB). Peak memory consumption was 77.7 MB. Max. memory is 16.1 GB. [2020-10-25 19:04:10,649 INFO L168 Benchmark]: Witness Printer took 143.80 ms. Allocated memory is still 125.8 MB. Free memory was 89.4 MB in the beginning and 77.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-10-25 19:04:10,651 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 30.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.31 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 25.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.77 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 23.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.86 ms. Allocated memory is still 48.2 MB. Free memory was 23.6 MB in the beginning and 22.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 730.30 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 41.5 MB in the end (delta: -19.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21126.07 ms. Allocated memory was 58.7 MB in the beginning and 125.8 MB in the end (delta: 67.1 MB). Free memory was 41.0 MB in the beginning and 89.4 MB in the end (delta: -48.4 MB). Peak memory consumption was 77.7 MB. Max. memory is 16.1 GB. * Witness Printer took 143.80 ms. Allocated memory is still 125.8 MB. Free memory was 89.4 MB in the beginning and 77.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 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: 20.8s, OverallIterations: 33, TraceHistogramMax: 10, AutomataDifference: 2.6s, 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, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2349 GetRequests, 2185 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s 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: 0.6s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 2.5s 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...