./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f 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 ../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34d9ef61eabdd9c5759553acd1add875b11b0827 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Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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 ../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34d9ef61eabdd9c5759553acd1add875b11b0827 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 14:12:45,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 14:12:45,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 14:12:45,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 14:12:45,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 14:12:45,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 14:12:45,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 14:12:45,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 14:12:45,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 14:12:45,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 14:12:45,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 14:12:45,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 14:12:45,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:12:45,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:12:45,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:12:45,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:12:45,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:12:45,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:12:45,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:12:45,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:12:45,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:12:45,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:12:45,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:12:45,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:12:45,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:12:45,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:12:45,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:12:45,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:12:45,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:12:45,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:12:45,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:12:45,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:12:45,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:12:45,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:12:45,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:12:45,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:12:45,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:12:45,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:12:45,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:12:45,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:12:45,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:12:45,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 14:12:45,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:12:45,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:12:45,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:12:45,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:12:45,407 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:12:45,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:12:45,408 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:12:45,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 14:12:45,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:12:45,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:12:45,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:12:45,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:12:45,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:12:45,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:12:45,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:12:45,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:12:45,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:12:45,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:12:45,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:12:45,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:12:45,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:12:45,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:12:45,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:12:45,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:12:45,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:12:45,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 14:12:45,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 14:12:45,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:12:45,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:12:45,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34d9ef61eabdd9c5759553acd1add875b11b0827 [2020-12-02 14:12:45,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:12:45,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:12:45,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:12:45,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:12:45,952 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:12:45,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-12-02 14:12:46,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25cf3f97d/3172a5d223e84823a22ed810541842ee/FLAG3daf4e8a1 [2020-12-02 14:12:46,759 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:12:46,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-12-02 14:12:46,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25cf3f97d/3172a5d223e84823a22ed810541842ee/FLAG3daf4e8a1 [2020-12-02 14:12:47,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25cf3f97d/3172a5d223e84823a22ed810541842ee [2020-12-02 14:12:47,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:12:47,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:12:47,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:12:47,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:12:47,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:12:47,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7da801d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47, skipping insertion in model container [2020-12-02 14:12:47,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,118 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:12:47,133 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:12:47,328 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c[631,644] [2020-12-02 14:12:47,352 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:12:47,365 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:12:47,381 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c[631,644] [2020-12-02 14:12:47,387 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:12:47,405 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:12:47,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47 WrapperNode [2020-12-02 14:12:47,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:12:47,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:12:47,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:12:47,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:12:47,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:12:47,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:12:47,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:12:47,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:12:47,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (1/1) ... [2020-12-02 14:12:47,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:12:47,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:12:47,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:12:47,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:12:47,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (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 [2020-12-02 14:12:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:12:47,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:12:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 14:12:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:12:47,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:12:47,963 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-02 14:12:47,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:12:47 BoogieIcfgContainer [2020-12-02 14:12:47,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:12:47,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:12:47,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:12:47,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:12:47,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:12:47" (1/3) ... [2020-12-02 14:12:47,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53268c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:12:47, skipping insertion in model container [2020-12-02 14:12:47,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:12:47" (2/3) ... [2020-12-02 14:12:47,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53268c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:12:47, skipping insertion in model container [2020-12-02 14:12:47,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:12:47" (3/3) ... [2020-12-02 14:12:47,980 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-12-02 14:12:48,001 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:12:48,005 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:12:48,019 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:12:48,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:12:48,067 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:12:48,067 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:12:48,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:12:48,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:12:48,069 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:12:48,070 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:12:48,070 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:12:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-02 14:12:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 14:12:48,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:48,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 14:12:48,103 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:48,114 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-02 14:12:48,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:48,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803600659] [2020-12-02 14:12:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803600659] [2020-12-02 14:12:48,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:12:48,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 14:12:48,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961874664] [2020-12-02 14:12:48,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-02 14:12:48,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-02 14:12:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 14:12:48,487 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-02 14:12:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:48,567 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-02 14:12:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-02 14:12:48,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-02 14:12:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:48,581 INFO L225 Difference]: With dead ends: 22 [2020-12-02 14:12:48,581 INFO L226 Difference]: Without dead ends: 10 [2020-12-02 14:12:48,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 14:12:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-02 14:12:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-02 14:12:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-02 14:12:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-02 14:12:48,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-02 14:12:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:48,626 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-02 14:12:48,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-02 14:12:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-02 14:12:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-02 14:12:48,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:48,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:48,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 14:12:48,628 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-02 14:12:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:48,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129690492] [2020-12-02 14:12:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:48,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129690492] [2020-12-02 14:12:48,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138838695] [2020-12-02 14:12:48,693 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 [2020-12-02 14:12:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-02 14:12:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:48,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:48,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-02 14:12:48,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506295200] [2020-12-02 14:12:48,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 14:12:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 14:12:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-02 14:12:48,850 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-02 14:12:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:48,893 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-02 14:12:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 14:12:48,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-02 14:12:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:48,895 INFO L225 Difference]: With dead ends: 16 [2020-12-02 14:12:48,896 INFO L226 Difference]: Without dead ends: 12 [2020-12-02 14:12:48,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-02 14:12:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-02 14:12:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-02 14:12:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-02 14:12:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-02 14:12:48,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-02 14:12:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:48,902 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-02 14:12:48,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 14:12:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-02 14:12:48,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 14:12:48,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:48,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:49,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-02 14:12:49,104 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-02 14:12:49,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:49,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090098785] [2020-12-02 14:12:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:49,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090098785] [2020-12-02 14:12:49,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185683455] [2020-12-02 14:12:49,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:49,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:12:49,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:49,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-02 14:12:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:49,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:49,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-02 14:12:49,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327612376] [2020-12-02 14:12:49,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 14:12:49,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 14:12:49,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-02 14:12:49,280 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-02 14:12:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:49,307 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-02 14:12:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 14:12:49,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-02 14:12:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:49,308 INFO L225 Difference]: With dead ends: 18 [2020-12-02 14:12:49,308 INFO L226 Difference]: Without dead ends: 14 [2020-12-02 14:12:49,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-02 14:12:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-02 14:12:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-02 14:12:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-02 14:12:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-02 14:12:49,312 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-02 14:12:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:49,313 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-02 14:12:49,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 14:12:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-02 14:12:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 14:12:49,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:49,314 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:49,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:49,528 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-02 14:12:49,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:49,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6506712] [2020-12-02 14:12:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:49,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6506712] [2020-12-02 14:12:49,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23587446] [2020-12-02 14:12:49,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:49,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-02 14:12:49,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:49,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-02 14:12:49,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:49,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:49,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-02 14:12:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324925147] [2020-12-02 14:12:49,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-02 14:12:49,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-02 14:12:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-02 14:12:49,755 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-02 14:12:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:49,805 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-02 14:12:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 14:12:49,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-02 14:12:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:49,808 INFO L225 Difference]: With dead ends: 20 [2020-12-02 14:12:49,808 INFO L226 Difference]: Without dead ends: 16 [2020-12-02 14:12:49,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-02 14:12:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-02 14:12:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-02 14:12:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-02 14:12:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-02 14:12:49,819 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-02 14:12:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:49,820 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-02 14:12:49,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-02 14:12:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-02 14:12:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 14:12:49,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:49,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:50,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:50,023 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-12-02 14:12:50,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:50,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362127522] [2020-12-02 14:12:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362127522] [2020-12-02 14:12:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097695512] [2020-12-02 14:12:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:50,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:12:50,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-02 14:12:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:50,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:50,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-02 14:12:50,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576416430] [2020-12-02 14:12:50,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 14:12:50,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 14:12:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-02 14:12:50,267 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-12-02 14:12:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:50,309 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-02 14:12:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 14:12:50,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-02 14:12:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:50,311 INFO L225 Difference]: With dead ends: 22 [2020-12-02 14:12:50,312 INFO L226 Difference]: Without dead ends: 18 [2020-12-02 14:12:50,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-02 14:12:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-02 14:12:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-02 14:12:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-02 14:12:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-02 14:12:50,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-02 14:12:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:50,318 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-02 14:12:50,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 14:12:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-02 14:12:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-02 14:12:50,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:50,319 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:50,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:50,533 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:50,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-12-02 14:12:50,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:50,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286325440] [2020-12-02 14:12:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:50,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286325440] [2020-12-02 14:12:50,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200480123] [2020-12-02 14:12:50,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:50,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-02 14:12:50,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-02 14:12:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:50,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:50,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-02 14:12:50,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398372651] [2020-12-02 14:12:50,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 14:12:50,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:50,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 14:12:50,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-02 14:12:50,804 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-02 14:12:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:50,843 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-02 14:12:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-02 14:12:50,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-02 14:12:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:50,845 INFO L225 Difference]: With dead ends: 24 [2020-12-02 14:12:50,845 INFO L226 Difference]: Without dead ends: 20 [2020-12-02 14:12:50,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-02 14:12:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-02 14:12:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-02 14:12:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-02 14:12:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-02 14:12:50,851 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-02 14:12:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:50,852 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-02 14:12:50,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 14:12:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-02 14:12:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 14:12:50,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:50,853 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:51,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-02 14:12:51,069 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-12-02 14:12:51,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:51,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818432457] [2020-12-02 14:12:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:51,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818432457] [2020-12-02 14:12:51,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242956940] [2020-12-02 14:12:51,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:51,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-02 14:12:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-02 14:12:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:51,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:51,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-02 14:12:51,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138104286] [2020-12-02 14:12:51,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-02 14:12:51,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:51,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-02 14:12:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-02 14:12:51,282 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-02 14:12:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:51,316 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-02 14:12:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-02 14:12:51,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-02 14:12:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:51,318 INFO L225 Difference]: With dead ends: 26 [2020-12-02 14:12:51,318 INFO L226 Difference]: Without dead ends: 22 [2020-12-02 14:12:51,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-02 14:12:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-02 14:12:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-02 14:12:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-02 14:12:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-02 14:12:51,323 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-02 14:12:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:51,324 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-02 14:12:51,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-02 14:12:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-02 14:12:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-02 14:12:51,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:51,325 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:51,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:51,540 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-12-02 14:12:51,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:51,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724350080] [2020-12-02 14:12:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724350080] [2020-12-02 14:12:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049144653] [2020-12-02 14:12:51,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:51,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-02 14:12:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:51,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:51,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-02 14:12:51,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969125888] [2020-12-02 14:12:51,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-02 14:12:51,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:51,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-02 14:12:51,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-02 14:12:51,804 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-02 14:12:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:51,859 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-02 14:12:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-02 14:12:51,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-02 14:12:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:51,863 INFO L225 Difference]: With dead ends: 28 [2020-12-02 14:12:51,864 INFO L226 Difference]: Without dead ends: 24 [2020-12-02 14:12:51,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-02 14:12:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-02 14:12:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-02 14:12:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-02 14:12:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-02 14:12:51,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-02 14:12:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:51,877 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-02 14:12:51,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-02 14:12:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-02 14:12:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-02 14:12:51,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:51,880 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:52,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:52,096 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-12-02 14:12:52,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:52,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608016407] [2020-12-02 14:12:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608016407] [2020-12-02 14:12:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817327039] [2020-12-02 14:12:52,197 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 [2020-12-02 14:12:52,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:12:52,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-02 14:12:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:52,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:52,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-02 14:12:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075789923] [2020-12-02 14:12:52,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-02 14:12:52,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-02 14:12:52,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-02 14:12:52,309 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-02 14:12:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:52,346 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-02 14:12:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-02 14:12:52,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-02 14:12:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:52,347 INFO L225 Difference]: With dead ends: 30 [2020-12-02 14:12:52,347 INFO L226 Difference]: Without dead ends: 26 [2020-12-02 14:12:52,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-02 14:12:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-02 14:12:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-02 14:12:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-02 14:12:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-02 14:12:52,352 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-02 14:12:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:52,352 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-02 14:12:52,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-02 14:12:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-02 14:12:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-02 14:12:52,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:52,353 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:52,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-02 14:12:52,568 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-12-02 14:12:52,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:52,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562681285] [2020-12-02 14:12:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:52,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562681285] [2020-12-02 14:12:52,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827959716] [2020-12-02 14:12:52,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:52,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-02 14:12:52,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:52,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-02 14:12:52,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:52,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:52,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-02 14:12:52,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439632764] [2020-12-02 14:12:52,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-02 14:12:52,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-02 14:12:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-02 14:12:52,844 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-02 14:12:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:52,894 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-02 14:12:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-02 14:12:52,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-02 14:12:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:52,895 INFO L225 Difference]: With dead ends: 32 [2020-12-02 14:12:52,895 INFO L226 Difference]: Without dead ends: 28 [2020-12-02 14:12:52,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-02 14:12:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-02 14:12:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-02 14:12:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-02 14:12:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-02 14:12:52,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-02 14:12:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:52,900 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-02 14:12:52,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-02 14:12:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-02 14:12:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-02 14:12:52,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:52,901 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:53,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:53,114 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-12-02 14:12:53,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:53,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312344146] [2020-12-02 14:12:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:53,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312344146] [2020-12-02 14:12:53,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579881643] [2020-12-02 14:12:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:53,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:12:53,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:53,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-02 14:12:53,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:53,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:53,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-02 14:12:53,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11968072] [2020-12-02 14:12:53,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-02 14:12:53,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:53,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-02 14:12:53,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-02 14:12:53,433 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-12-02 14:12:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:53,481 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-02 14:12:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-02 14:12:53,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-02 14:12:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:53,483 INFO L225 Difference]: With dead ends: 34 [2020-12-02 14:12:53,483 INFO L226 Difference]: Without dead ends: 30 [2020-12-02 14:12:53,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-02 14:12:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-02 14:12:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-02 14:12:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-02 14:12:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-02 14:12:53,488 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-02 14:12:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:53,489 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-02 14:12:53,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-02 14:12:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-02 14:12:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-02 14:12:53,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:53,495 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:53,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:53,711 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-12-02 14:12:53,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:53,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372589392] [2020-12-02 14:12:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372589392] [2020-12-02 14:12:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655614653] [2020-12-02 14:12:53,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:53,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-02 14:12:53,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:53,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-02 14:12:53,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-02 14:12:54,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862537222] [2020-12-02 14:12:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-02 14:12:54,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-02 14:12:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-02 14:12:54,025 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-02 14:12:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:54,079 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-02 14:12:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-02 14:12:54,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-02 14:12:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:54,081 INFO L225 Difference]: With dead ends: 36 [2020-12-02 14:12:54,081 INFO L226 Difference]: Without dead ends: 32 [2020-12-02 14:12:54,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-02 14:12:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-02 14:12:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-02 14:12:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 14:12:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-02 14:12:54,086 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-02 14:12:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:54,087 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-02 14:12:54,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-02 14:12:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-02 14:12:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-02 14:12:54,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:54,088 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:54,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-02 14:12:54,302 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:54,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-12-02 14:12:54,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:54,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279607273] [2020-12-02 14:12:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:54,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279607273] [2020-12-02 14:12:54,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354704253] [2020-12-02 14:12:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:54,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-02 14:12:54,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-02 14:12:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:54,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:54,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-02 14:12:54,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862247933] [2020-12-02 14:12:54,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-02 14:12:54,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:54,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-02 14:12:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-02 14:12:54,603 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-02 14:12:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:54,654 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-02 14:12:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-02 14:12:54,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-02 14:12:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:54,657 INFO L225 Difference]: With dead ends: 38 [2020-12-02 14:12:54,657 INFO L226 Difference]: Without dead ends: 34 [2020-12-02 14:12:54,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-02 14:12:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-02 14:12:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-02 14:12:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-02 14:12:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-02 14:12:54,670 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-02 14:12:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:54,673 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-02 14:12:54,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-02 14:12:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-02 14:12:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-02 14:12:54,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:54,675 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:54,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-02 14:12:54,890 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:54,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-12-02 14:12:54,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:54,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235686625] [2020-12-02 14:12:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:55,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235686625] [2020-12-02 14:12:55,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870809606] [2020-12-02 14:12:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 14:12:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:55,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:55,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-02 14:12:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303814827] [2020-12-02 14:12:55,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-02 14:12:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-02 14:12:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-02 14:12:55,242 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-02 14:12:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:55,303 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-02 14:12:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-02 14:12:55,304 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-02 14:12:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:55,305 INFO L225 Difference]: With dead ends: 40 [2020-12-02 14:12:55,305 INFO L226 Difference]: Without dead ends: 36 [2020-12-02 14:12:55,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-02 14:12:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-02 14:12:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-02 14:12:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-02 14:12:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-02 14:12:55,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-02 14:12:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:55,314 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-02 14:12:55,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-02 14:12:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-02 14:12:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-02 14:12:55,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:55,315 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:55,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-02 14:12:55,531 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-12-02 14:12:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:55,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835366029] [2020-12-02 14:12:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:55,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835366029] [2020-12-02 14:12:55,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296688772] [2020-12-02 14:12:55,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:55,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:12:55,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-02 14:12:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:55,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:55,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-02 14:12:55,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527843997] [2020-12-02 14:12:55,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-02 14:12:55,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:55,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-02 14:12:55,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-02 14:12:55,893 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-02 14:12:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:55,956 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-02 14:12:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-02 14:12:55,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-02 14:12:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:55,958 INFO L225 Difference]: With dead ends: 42 [2020-12-02 14:12:55,958 INFO L226 Difference]: Without dead ends: 38 [2020-12-02 14:12:55,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-02 14:12:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-02 14:12:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-02 14:12:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-02 14:12:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-02 14:12:55,963 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-02 14:12:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:55,964 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-02 14:12:55,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-02 14:12:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-02 14:12:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-02 14:12:55,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:55,965 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:56,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:56,180 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-12-02 14:12:56,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:56,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259661229] [2020-12-02 14:12:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:56,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259661229] [2020-12-02 14:12:56,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467343834] [2020-12-02 14:12:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:56,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-02 14:12:56,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-02 14:12:56,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:56,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:56,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-02 14:12:56,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374525287] [2020-12-02 14:12:56,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-02 14:12:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-02 14:12:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-02 14:12:56,544 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-02 14:12:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:56,613 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-02 14:12:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-02 14:12:56,614 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-02 14:12:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:56,615 INFO L225 Difference]: With dead ends: 44 [2020-12-02 14:12:56,615 INFO L226 Difference]: Without dead ends: 40 [2020-12-02 14:12:56,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-02 14:12:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-02 14:12:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-02 14:12:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-02 14:12:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-02 14:12:56,620 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-02 14:12:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:56,621 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-02 14:12:56,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-02 14:12:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-02 14:12:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-02 14:12:56,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:56,622 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:56,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-02 14:12:56,835 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-12-02 14:12:56,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:56,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617141234] [2020-12-02 14:12:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:57,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617141234] [2020-12-02 14:12:57,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864030002] [2020-12-02 14:12:57,096 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 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 [2020-12-02 14:12:57,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:12:57,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-02 14:12:57,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:57,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:57,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-02 14:12:57,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428980669] [2020-12-02 14:12:57,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-02 14:12:57,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-02 14:12:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-02 14:12:57,237 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-12-02 14:12:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:57,299 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-02 14:12:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-02 14:12:57,299 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-02 14:12:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:57,300 INFO L225 Difference]: With dead ends: 46 [2020-12-02 14:12:57,300 INFO L226 Difference]: Without dead ends: 42 [2020-12-02 14:12:57,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-02 14:12:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-02 14:12:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-02 14:12:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-02 14:12:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-02 14:12:57,305 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-02 14:12:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:57,305 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-02 14:12:57,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-02 14:12:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-02 14:12:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-02 14:12:57,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:57,306 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:57,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-02 14:12:57,519 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-12-02 14:12:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:57,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916887416] [2020-12-02 14:12:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:57,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916887416] [2020-12-02 14:12:57,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704461889] [2020-12-02 14:12:57,763 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 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 [2020-12-02 14:12:57,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-02 14:12:57,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-02 14:12:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:57,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:57,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-02 14:12:57,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447002941] [2020-12-02 14:12:57,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-02 14:12:57,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:57,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-02 14:12:57,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-02 14:12:57,904 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-02 14:12:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:57,978 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-02 14:12:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-02 14:12:57,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-02 14:12:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:57,979 INFO L225 Difference]: With dead ends: 48 [2020-12-02 14:12:57,979 INFO L226 Difference]: Without dead ends: 44 [2020-12-02 14:12:57,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-02 14:12:57,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-02 14:12:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-02 14:12:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-02 14:12:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-02 14:12:57,984 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-02 14:12:57,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:57,985 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-02 14:12:57,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-02 14:12:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-02 14:12:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-02 14:12:57,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:57,986 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:58,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-02 14:12:58,200 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-12-02 14:12:58,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:58,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465865247] [2020-12-02 14:12:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:58,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465865247] [2020-12-02 14:12:58,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267778453] [2020-12-02 14:12:58,514 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 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 [2020-12-02 14:12:58,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-02 14:12:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:12:58,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-02 14:12:58,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:58,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:58,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-02 14:12:58,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385970967] [2020-12-02 14:12:58,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-02 14:12:58,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-02 14:12:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-02 14:12:58,719 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-02 14:12:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:58,782 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-02 14:12:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-02 14:12:58,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-02 14:12:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:58,785 INFO L225 Difference]: With dead ends: 50 [2020-12-02 14:12:58,785 INFO L226 Difference]: Without dead ends: 46 [2020-12-02 14:12:58,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-02 14:12:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-02 14:12:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-02 14:12:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-02 14:12:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-02 14:12:58,800 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-02 14:12:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:58,800 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-02 14:12:58,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-02 14:12:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-02 14:12:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-02 14:12:58,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:58,801 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:59,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:59,010 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-12-02 14:12:59,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:59,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644210062] [2020-12-02 14:12:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:59,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644210062] [2020-12-02 14:12:59,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192931074] [2020-12-02 14:12:59,341 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 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 [2020-12-02 14:12:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:12:59,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-02 14:12:59,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:12:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:12:59,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:12:59,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-02 14:12:59,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896527196] [2020-12-02 14:12:59,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-02 14:12:59,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:12:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-02 14:12:59,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-02 14:12:59,496 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-02 14:12:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:12:59,572 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-02 14:12:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-02 14:12:59,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-02 14:12:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:12:59,574 INFO L225 Difference]: With dead ends: 52 [2020-12-02 14:12:59,574 INFO L226 Difference]: Without dead ends: 48 [2020-12-02 14:12:59,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-02 14:12:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-02 14:12:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-02 14:12:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-02 14:12:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-02 14:12:59,579 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-02 14:12:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:12:59,580 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-02 14:12:59,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-02 14:12:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-02 14:12:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-02 14:12:59,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:12:59,581 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-02 14:12:59,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:12:59,796 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:12:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:12:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-12-02 14:12:59,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:12:59,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714220499] [2020-12-02 14:12:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:12:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:00,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714220499] [2020-12-02 14:13:00,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620841718] [2020-12-02 14:13:00,188 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 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 [2020-12-02 14:13:00,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:13:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:00,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-02 14:13:00,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:00,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:00,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-02 14:13:00,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786733627] [2020-12-02 14:13:00,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-02 14:13:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:00,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-02 14:13:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-02 14:13:00,374 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-02 14:13:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:00,467 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-02 14:13:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-02 14:13:00,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-02 14:13:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:00,469 INFO L225 Difference]: With dead ends: 54 [2020-12-02 14:13:00,469 INFO L226 Difference]: Without dead ends: 50 [2020-12-02 14:13:00,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-02 14:13:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-02 14:13:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-02 14:13:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-02 14:13:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-02 14:13:00,474 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-02 14:13:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:00,474 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-02 14:13:00,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-02 14:13:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-02 14:13:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-02 14:13:00,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:00,475 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:00,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-02 14:13:00,689 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-12-02 14:13:00,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:00,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739786321] [2020-12-02 14:13:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739786321] [2020-12-02 14:13:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998621858] [2020-12-02 14:13:01,106 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 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 [2020-12-02 14:13:01,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-02 14:13:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:01,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-02 14:13:01,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:01,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:01,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-02 14:13:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837478813] [2020-12-02 14:13:01,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-02 14:13:01,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:01,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-02 14:13:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-02 14:13:01,267 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-02 14:13:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:01,343 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-02 14:13:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-02 14:13:01,346 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-02 14:13:01,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:01,346 INFO L225 Difference]: With dead ends: 56 [2020-12-02 14:13:01,346 INFO L226 Difference]: Without dead ends: 52 [2020-12-02 14:13:01,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-02 14:13:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-02 14:13:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-02 14:13:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-02 14:13:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-02 14:13:01,350 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-02 14:13:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:01,350 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-02 14:13:01,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-02 14:13:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-02 14:13:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-02 14:13:01,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:01,351 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:01,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-02 14:13:01,566 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-12-02 14:13:01,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:01,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411788744] [2020-12-02 14:13:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411788744] [2020-12-02 14:13:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493811587] [2020-12-02 14:13:02,002 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 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 [2020-12-02 14:13:02,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:13:02,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:02,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-02 14:13:02,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:02,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:02,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-02 14:13:02,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768607124] [2020-12-02 14:13:02,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-02 14:13:02,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:02,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-02 14:13:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-02 14:13:02,171 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-12-02 14:13:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:02,267 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-02 14:13:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-02 14:13:02,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-02 14:13:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:02,269 INFO L225 Difference]: With dead ends: 58 [2020-12-02 14:13:02,269 INFO L226 Difference]: Without dead ends: 54 [2020-12-02 14:13:02,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-02 14:13:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-02 14:13:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-02 14:13:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-02 14:13:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-02 14:13:02,273 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-02 14:13:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:02,274 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-02 14:13:02,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-02 14:13:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-02 14:13:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-02 14:13:02,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:02,275 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:02,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:02,489 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-12-02 14:13:02,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:02,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124561303] [2020-12-02 14:13:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:02,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124561303] [2020-12-02 14:13:02,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301606632] [2020-12-02 14:13:02,876 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 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 [2020-12-02 14:13:02,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-02 14:13:02,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:02,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-02 14:13:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:03,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:03,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-02 14:13:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029689665] [2020-12-02 14:13:03,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-02 14:13:03,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-02 14:13:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-02 14:13:03,059 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-02 14:13:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:03,146 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-02 14:13:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-02 14:13:03,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-02 14:13:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:03,147 INFO L225 Difference]: With dead ends: 60 [2020-12-02 14:13:03,147 INFO L226 Difference]: Without dead ends: 56 [2020-12-02 14:13:03,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-02 14:13:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-02 14:13:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-02 14:13:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-02 14:13:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-02 14:13:03,151 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-02 14:13:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:03,151 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-02 14:13:03,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-02 14:13:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-02 14:13:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-02 14:13:03,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:03,153 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:03,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-02 14:13:03,369 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-12-02 14:13:03,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:03,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784996611] [2020-12-02 14:13:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:03,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784996611] [2020-12-02 14:13:03,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416209255] [2020-12-02 14:13:03,861 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 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 [2020-12-02 14:13:03,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-02 14:13:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-02 14:13:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:04,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:04,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-02 14:13:04,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318579990] [2020-12-02 14:13:04,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-02 14:13:04,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-02 14:13:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-02 14:13:04,039 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-02 14:13:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:04,134 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-02 14:13:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-02 14:13:04,134 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-02 14:13:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:04,135 INFO L225 Difference]: With dead ends: 62 [2020-12-02 14:13:04,135 INFO L226 Difference]: Without dead ends: 58 [2020-12-02 14:13:04,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-02 14:13:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-02 14:13:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-02 14:13:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-02 14:13:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-02 14:13:04,140 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-02 14:13:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:04,140 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-02 14:13:04,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-02 14:13:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-02 14:13:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-02 14:13:04,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:04,141 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:04,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:04,355 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-12-02 14:13:04,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:04,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178306486] [2020-12-02 14:13:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:04,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178306486] [2020-12-02 14:13:04,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961184464] [2020-12-02 14:13:04,821 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 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 [2020-12-02 14:13:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-02 14:13:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:04,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:04,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-02 14:13:04,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023205168] [2020-12-02 14:13:04,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-02 14:13:04,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-02 14:13:04,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-02 14:13:04,995 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-02 14:13:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:05,101 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-02 14:13:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-02 14:13:05,102 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-02 14:13:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:05,102 INFO L225 Difference]: With dead ends: 64 [2020-12-02 14:13:05,103 INFO L226 Difference]: Without dead ends: 60 [2020-12-02 14:13:05,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-02 14:13:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-02 14:13:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-02 14:13:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-02 14:13:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-02 14:13:05,107 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-02 14:13:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:05,107 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-02 14:13:05,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-02 14:13:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-02 14:13:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-02 14:13:05,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:05,108 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:05,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-02 14:13:05,324 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:05,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:05,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-12-02 14:13:05,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:05,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783111281] [2020-12-02 14:13:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:05,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783111281] [2020-12-02 14:13:05,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370865418] [2020-12-02 14:13:05,863 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 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 [2020-12-02 14:13:05,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:13:05,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-02 14:13:05,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:06,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:06,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-02 14:13:06,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536730909] [2020-12-02 14:13:06,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-02 14:13:06,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:06,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-02 14:13:06,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-02 14:13:06,016 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-02 14:13:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:06,103 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-02 14:13:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-02 14:13:06,103 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-02 14:13:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:06,104 INFO L225 Difference]: With dead ends: 66 [2020-12-02 14:13:06,104 INFO L226 Difference]: Without dead ends: 62 [2020-12-02 14:13:06,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-02 14:13:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-02 14:13:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-02 14:13:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-02 14:13:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-02 14:13:06,108 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-02 14:13:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:06,109 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-02 14:13:06,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-02 14:13:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-02 14:13:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-02 14:13:06,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:06,110 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:06,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-02 14:13:06,324 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:06,324 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-12-02 14:13:06,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:06,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458676715] [2020-12-02 14:13:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:06,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458676715] [2020-12-02 14:13:06,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332797774] [2020-12-02 14:13:06,935 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 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 [2020-12-02 14:13:07,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-02 14:13:07,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:07,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-02 14:13:07,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:07,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:07,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-02 14:13:07,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245782698] [2020-12-02 14:13:07,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-02 14:13:07,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-02 14:13:07,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-02 14:13:07,143 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-02 14:13:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:07,246 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-02 14:13:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-02 14:13:07,246 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-02 14:13:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:07,247 INFO L225 Difference]: With dead ends: 68 [2020-12-02 14:13:07,247 INFO L226 Difference]: Without dead ends: 64 [2020-12-02 14:13:07,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-02 14:13:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-02 14:13:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-02 14:13:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-02 14:13:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-02 14:13:07,251 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-02 14:13:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:07,252 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-02 14:13:07,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-02 14:13:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-02 14:13:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-02 14:13:07,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:07,253 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:07,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-02 14:13:07,467 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-12-02 14:13:07,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:07,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986826523] [2020-12-02 14:13:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:08,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986826523] [2020-12-02 14:13:08,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732179877] [2020-12-02 14:13:08,009 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 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 [2020-12-02 14:13:08,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:13:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:08,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-02 14:13:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:08,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:08,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-02 14:13:08,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147918697] [2020-12-02 14:13:08,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-02 14:13:08,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-02 14:13:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-02 14:13:08,217 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-12-02 14:13:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:08,324 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-02 14:13:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-02 14:13:08,325 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-02 14:13:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:08,326 INFO L225 Difference]: With dead ends: 70 [2020-12-02 14:13:08,326 INFO L226 Difference]: Without dead ends: 66 [2020-12-02 14:13:08,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-02 14:13:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-02 14:13:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-02 14:13:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-02 14:13:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-02 14:13:08,330 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-02 14:13:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:08,330 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-02 14:13:08,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-02 14:13:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-02 14:13:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-02 14:13:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:08,332 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:08,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-02 14:13:08,546 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-12-02 14:13:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:08,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492679205] [2020-12-02 14:13:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:09,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492679205] [2020-12-02 14:13:09,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270604795] [2020-12-02 14:13:09,190 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 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 [2020-12-02 14:13:09,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-02 14:13:09,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-02 14:13:09,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:09,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:09,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-02 14:13:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497515604] [2020-12-02 14:13:09,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-02 14:13:09,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:09,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-02 14:13:09,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-02 14:13:09,386 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-02 14:13:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:09,494 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-02 14:13:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-02 14:13:09,495 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-02 14:13:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:09,496 INFO L225 Difference]: With dead ends: 72 [2020-12-02 14:13:09,496 INFO L226 Difference]: Without dead ends: 68 [2020-12-02 14:13:09,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-02 14:13:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-02 14:13:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-02 14:13:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-02 14:13:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-02 14:13:09,502 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-02 14:13:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:09,503 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-02 14:13:09,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-02 14:13:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-02 14:13:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-02 14:13:09,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:09,504 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:09,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:09,720 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:09,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-12-02 14:13:09,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:09,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114614772] [2020-12-02 14:13:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:10,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114614772] [2020-12-02 14:13:10,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678138190] [2020-12-02 14:13:10,356 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 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 [2020-12-02 14:13:10,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-02 14:13:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-02 14:13:10,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:10,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:10,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-02 14:13:10,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961585859] [2020-12-02 14:13:10,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-02 14:13:10,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:10,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-02 14:13:10,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-02 14:13:10,578 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-02 14:13:10,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:10,695 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-02 14:13:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-02 14:13:10,696 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-02 14:13:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:10,697 INFO L225 Difference]: With dead ends: 74 [2020-12-02 14:13:10,697 INFO L226 Difference]: Without dead ends: 70 [2020-12-02 14:13:10,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-02 14:13:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-02 14:13:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-02 14:13:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-02 14:13:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-02 14:13:10,700 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-02 14:13:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:10,701 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-02 14:13:10,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-02 14:13:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-02 14:13:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-02 14:13:10,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:10,702 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:10,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:10,916 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-12-02 14:13:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:10,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138073917] [2020-12-02 14:13:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:11,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138073917] [2020-12-02 14:13:11,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935970671] [2020-12-02 14:13:11,664 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 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 [2020-12-02 14:13:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-02 14:13:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:11,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:11,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-02 14:13:11,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076284621] [2020-12-02 14:13:11,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-02 14:13:11,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:11,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-02 14:13:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-02 14:13:11,846 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-02 14:13:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:11,973 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-02 14:13:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-02 14:13:11,974 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-02 14:13:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:11,975 INFO L225 Difference]: With dead ends: 76 [2020-12-02 14:13:11,975 INFO L226 Difference]: Without dead ends: 72 [2020-12-02 14:13:11,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-02 14:13:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-02 14:13:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-02 14:13:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-02 14:13:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-02 14:13:11,979 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-02 14:13:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:11,979 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-02 14:13:11,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-02 14:13:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-02 14:13:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-02 14:13:11,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:11,981 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:12,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:12,196 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-12-02 14:13:12,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:12,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626586523] [2020-12-02 14:13:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:12,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626586523] [2020-12-02 14:13:12,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559447113] [2020-12-02 14:13:12,961 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:13,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:13:13,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:13,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-02 14:13:13,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:13,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:13,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-02 14:13:13,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504541879] [2020-12-02 14:13:13,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-02 14:13:13,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-02 14:13:13,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-02 14:13:13,167 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-02 14:13:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:13,280 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-02 14:13:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-02 14:13:13,280 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-02 14:13:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:13,281 INFO L225 Difference]: With dead ends: 78 [2020-12-02 14:13:13,281 INFO L226 Difference]: Without dead ends: 74 [2020-12-02 14:13:13,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-02 14:13:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-02 14:13:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-02 14:13:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-02 14:13:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-02 14:13:13,285 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-02 14:13:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:13,286 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-02 14:13:13,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-02 14:13:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-02 14:13:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-02 14:13:13,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:13,287 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:13,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-02 14:13:13,502 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:13,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-12-02 14:13:13,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:13,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151662767] [2020-12-02 14:13:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:14,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151662767] [2020-12-02 14:13:14,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264280764] [2020-12-02 14:13:14,336 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:14,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-02 14:13:14,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:14,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-02 14:13:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:14,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:14,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-02 14:13:14,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597029063] [2020-12-02 14:13:14,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-02 14:13:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-02 14:13:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-02 14:13:14,576 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-02 14:13:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:14,706 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-02 14:13:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-02 14:13:14,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-02 14:13:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:14,707 INFO L225 Difference]: With dead ends: 80 [2020-12-02 14:13:14,707 INFO L226 Difference]: Without dead ends: 76 [2020-12-02 14:13:14,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-02 14:13:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-02 14:13:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-02 14:13:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-02 14:13:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-02 14:13:14,713 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-02 14:13:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:14,713 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-02 14:13:14,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-02 14:13:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-02 14:13:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-02 14:13:14,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:14,717 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:14,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:14,932 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-12-02 14:13:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:14,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231386514] [2020-12-02 14:13:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:15,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231386514] [2020-12-02 14:13:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275471607] [2020-12-02 14:13:15,813 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:15,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:13:15,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-02 14:13:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:16,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:16,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-02 14:13:16,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680973932] [2020-12-02 14:13:16,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-02 14:13:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:16,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-02 14:13:16,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-02 14:13:16,012 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-12-02 14:13:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:16,131 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-02 14:13:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-02 14:13:16,132 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-02 14:13:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:16,133 INFO L225 Difference]: With dead ends: 82 [2020-12-02 14:13:16,133 INFO L226 Difference]: Without dead ends: 78 [2020-12-02 14:13:16,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-02 14:13:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-02 14:13:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-02 14:13:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-02 14:13:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-02 14:13:16,137 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-02 14:13:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:16,137 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-02 14:13:16,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-02 14:13:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-02 14:13:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-02 14:13:16,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:16,138 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:16,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-02 14:13:16,339 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:16,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-12-02 14:13:16,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:16,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644236800] [2020-12-02 14:13:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:17,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644236800] [2020-12-02 14:13:17,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606777735] [2020-12-02 14:13:17,223 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:17,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-02 14:13:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-02 14:13:17,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:17,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:17,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-02 14:13:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347553613] [2020-12-02 14:13:17,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-02 14:13:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:17,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-02 14:13:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-02 14:13:17,436 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-02 14:13:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:17,576 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-02 14:13:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-02 14:13:17,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-02 14:13:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:17,578 INFO L225 Difference]: With dead ends: 84 [2020-12-02 14:13:17,578 INFO L226 Difference]: Without dead ends: 80 [2020-12-02 14:13:17,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-02 14:13:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-02 14:13:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-02 14:13:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-02 14:13:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-02 14:13:17,583 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-02 14:13:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:17,583 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-02 14:13:17,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-02 14:13:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-02 14:13:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-02 14:13:17,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:17,584 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:17,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:17,798 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:17,798 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-12-02 14:13:17,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:17,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783552165] [2020-12-02 14:13:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:18,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783552165] [2020-12-02 14:13:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2799268] [2020-12-02 14:13:18,792 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:18,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-02 14:13:18,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-02 14:13:18,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:19,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:19,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-02 14:13:19,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435484028] [2020-12-02 14:13:19,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-02 14:13:19,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-02 14:13:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-02 14:13:19,028 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-12-02 14:13:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:19,182 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-02 14:13:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-02 14:13:19,183 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-02 14:13:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:19,185 INFO L225 Difference]: With dead ends: 86 [2020-12-02 14:13:19,185 INFO L226 Difference]: Without dead ends: 82 [2020-12-02 14:13:19,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-02 14:13:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-02 14:13:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-02 14:13:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-02 14:13:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-02 14:13:19,190 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-02 14:13:19,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:19,191 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-02 14:13:19,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-02 14:13:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-02 14:13:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-02 14:13:19,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:19,192 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:19,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-02 14:13:19,408 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-12-02 14:13:19,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:19,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823932396] [2020-12-02 14:13:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:20,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823932396] [2020-12-02 14:13:20,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275194925] [2020-12-02 14:13:20,433 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-02 14:13:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:20,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:20,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-02 14:13:20,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925684868] [2020-12-02 14:13:20,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-02 14:13:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-02 14:13:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-02 14:13:20,638 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-02 14:13:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:20,810 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-02 14:13:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-02 14:13:20,813 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-02 14:13:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:20,814 INFO L225 Difference]: With dead ends: 88 [2020-12-02 14:13:20,814 INFO L226 Difference]: Without dead ends: 84 [2020-12-02 14:13:20,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-02 14:13:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-02 14:13:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-02 14:13:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-02 14:13:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-02 14:13:20,819 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-02 14:13:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:20,820 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-02 14:13:20,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-02 14:13:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-02 14:13:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-02 14:13:20,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:20,821 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:21,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-02 14:13:21,035 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-12-02 14:13:21,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:21,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087609239] [2020-12-02 14:13:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:22,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087609239] [2020-12-02 14:13:22,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780716766] [2020-12-02 14:13:22,117 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:22,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:13:22,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:22,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-02 14:13:22,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:22,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:22,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-02 14:13:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307998273] [2020-12-02 14:13:22,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-02 14:13:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-02 14:13:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-02 14:13:22,332 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-02 14:13:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:22,507 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-02 14:13:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-02 14:13:22,507 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-02 14:13:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:22,508 INFO L225 Difference]: With dead ends: 90 [2020-12-02 14:13:22,509 INFO L226 Difference]: Without dead ends: 86 [2020-12-02 14:13:22,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-02 14:13:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-02 14:13:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-02 14:13:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-02 14:13:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-02 14:13:22,513 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-02 14:13:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:22,514 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-02 14:13:22,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-02 14:13:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-02 14:13:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-02 14:13:22,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:22,515 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:22,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-02 14:13:22,731 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:22,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-12-02 14:13:22,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:22,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064087208] [2020-12-02 14:13:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:23,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064087208] [2020-12-02 14:13:23,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216454491] [2020-12-02 14:13:23,870 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:23,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-02 14:13:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:23,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-02 14:13:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:24,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:24,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-02 14:13:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425113346] [2020-12-02 14:13:24,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-02 14:13:24,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-02 14:13:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-02 14:13:24,113 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-02 14:13:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:24,253 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-02 14:13:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-02 14:13:24,256 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-02 14:13:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:24,257 INFO L225 Difference]: With dead ends: 92 [2020-12-02 14:13:24,257 INFO L226 Difference]: Without dead ends: 88 [2020-12-02 14:13:24,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-02 14:13:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-02 14:13:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-02 14:13:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-02 14:13:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-02 14:13:24,261 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-02 14:13:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:24,261 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-02 14:13:24,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-02 14:13:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-02 14:13:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-02 14:13:24,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:24,262 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:24,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-02 14:13:24,463 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-12-02 14:13:24,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:24,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229946459] [2020-12-02 14:13:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:25,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229946459] [2020-12-02 14:13:25,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849555823] [2020-12-02 14:13:25,654 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:25,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:13:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:25,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-02 14:13:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:25,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:25,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-02 14:13:25,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612577038] [2020-12-02 14:13:25,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-02 14:13:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-02 14:13:25,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-02 14:13:25,871 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-12-02 14:13:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:26,011 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-02 14:13:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-02 14:13:26,012 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-12-02 14:13:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:26,013 INFO L225 Difference]: With dead ends: 94 [2020-12-02 14:13:26,013 INFO L226 Difference]: Without dead ends: 90 [2020-12-02 14:13:26,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-02 14:13:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-02 14:13:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-02 14:13:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-02 14:13:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-02 14:13:26,018 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-02 14:13:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:26,018 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-02 14:13:26,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-02 14:13:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-02 14:13:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-02 14:13:26,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:26,019 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:26,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:26,230 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-12-02 14:13:26,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:26,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51602797] [2020-12-02 14:13:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:27,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51602797] [2020-12-02 14:13:27,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731999779] [2020-12-02 14:13:27,467 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:27,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-02 14:13:27,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:27,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-02 14:13:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:27,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:27,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-02 14:13:27,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209180442] [2020-12-02 14:13:27,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-02 14:13:27,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:27,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-02 14:13:27,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-02 14:13:27,717 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-02 14:13:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:27,909 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-02 14:13:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-02 14:13:27,910 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-02 14:13:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:27,910 INFO L225 Difference]: With dead ends: 96 [2020-12-02 14:13:27,911 INFO L226 Difference]: Without dead ends: 92 [2020-12-02 14:13:27,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-02 14:13:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-02 14:13:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-02 14:13:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-02 14:13:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-02 14:13:27,915 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-02 14:13:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:27,915 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-02 14:13:27,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-02 14:13:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-02 14:13:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-02 14:13:27,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:27,916 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:28,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-02 14:13:28,117 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:28,118 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-12-02 14:13:28,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:28,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894898564] [2020-12-02 14:13:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:29,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894898564] [2020-12-02 14:13:29,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179155141] [2020-12-02 14:13:29,338 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:29,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-02 14:13:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-02 14:13:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:29,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:29,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-02 14:13:29,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332656419] [2020-12-02 14:13:29,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-02 14:13:29,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-02 14:13:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-02 14:13:29,610 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2020-12-02 14:13:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:29,808 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-02 14:13:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-02 14:13:29,810 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-12-02 14:13:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:29,812 INFO L225 Difference]: With dead ends: 98 [2020-12-02 14:13:29,812 INFO L226 Difference]: Without dead ends: 94 [2020-12-02 14:13:29,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-02 14:13:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-02 14:13:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-02 14:13:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-02 14:13:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-02 14:13:29,817 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-12-02 14:13:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:29,818 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-02 14:13:29,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-02 14:13:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-02 14:13:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-02 14:13:29,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:29,819 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:30,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:30,034 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2020-12-02 14:13:30,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:30,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423423091] [2020-12-02 14:13:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:31,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423423091] [2020-12-02 14:13:31,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998811527] [2020-12-02 14:13:31,297 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-02 14:13:31,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:31,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:31,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-02 14:13:31,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476714265] [2020-12-02 14:13:31,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-02 14:13:31,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-02 14:13:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-02 14:13:31,525 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-12-02 14:13:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:31,694 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-02 14:13:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-02 14:13:31,694 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-02 14:13:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:31,695 INFO L225 Difference]: With dead ends: 100 [2020-12-02 14:13:31,696 INFO L226 Difference]: Without dead ends: 96 [2020-12-02 14:13:31,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-02 14:13:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-02 14:13:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-02 14:13:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-02 14:13:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-02 14:13:31,700 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-12-02 14:13:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:31,701 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-02 14:13:31,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-02 14:13:31,701 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-02 14:13:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-02 14:13:31,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:31,702 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:31,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:31,917 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2020-12-02 14:13:31,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:31,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557885138] [2020-12-02 14:13:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:33,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557885138] [2020-12-02 14:13:33,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895714012] [2020-12-02 14:13:33,240 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:33,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:13:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:33,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-02 14:13:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:33,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:33,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-02 14:13:33,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617351635] [2020-12-02 14:13:33,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-02 14:13:33,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-02 14:13:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-02 14:13:33,484 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-12-02 14:13:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:33,697 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-02 14:13:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-02 14:13:33,698 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-02 14:13:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:33,699 INFO L225 Difference]: With dead ends: 102 [2020-12-02 14:13:33,699 INFO L226 Difference]: Without dead ends: 98 [2020-12-02 14:13:33,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-02 14:13:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-02 14:13:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-02 14:13:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-02 14:13:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-02 14:13:33,704 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-12-02 14:13:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:33,704 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-02 14:13:33,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-02 14:13:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-02 14:13:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-02 14:13:33,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:33,706 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:33,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-02 14:13:33,918 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2020-12-02 14:13:33,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:33,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877722318] [2020-12-02 14:13:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:35,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877722318] [2020-12-02 14:13:35,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885540230] [2020-12-02 14:13:35,187 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:35,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-02 14:13:35,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:35,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-02 14:13:35,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:35,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:35,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-02 14:13:35,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735764133] [2020-12-02 14:13:35,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-02 14:13:35,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:35,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-02 14:13:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-02 14:13:35,485 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-12-02 14:13:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:35,652 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-02 14:13:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-02 14:13:35,653 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-02 14:13:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:35,654 INFO L225 Difference]: With dead ends: 104 [2020-12-02 14:13:35,655 INFO L226 Difference]: Without dead ends: 100 [2020-12-02 14:13:35,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-02 14:13:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-02 14:13:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-02 14:13:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-02 14:13:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-02 14:13:35,660 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-12-02 14:13:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:35,660 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-02 14:13:35,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-02 14:13:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-02 14:13:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-02 14:13:35,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:35,662 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:35,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-02 14:13:35,875 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2020-12-02 14:13:35,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:35,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106943301] [2020-12-02 14:13:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:37,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106943301] [2020-12-02 14:13:37,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174145564] [2020-12-02 14:13:37,446 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:37,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:13:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:37,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-02 14:13:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:37,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:37,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-02 14:13:37,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537124798] [2020-12-02 14:13:37,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-02 14:13:37,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-02 14:13:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-02 14:13:37,697 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2020-12-02 14:13:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:37,886 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-02 14:13:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-02 14:13:37,886 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-02 14:13:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:37,887 INFO L225 Difference]: With dead ends: 106 [2020-12-02 14:13:37,887 INFO L226 Difference]: Without dead ends: 102 [2020-12-02 14:13:37,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-02 14:13:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-02 14:13:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-02 14:13:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-02 14:13:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-02 14:13:37,890 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-12-02 14:13:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:37,891 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-02 14:13:37,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-02 14:13:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-02 14:13:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-02 14:13:37,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:37,892 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:38,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-02 14:13:38,095 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2020-12-02 14:13:38,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:38,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461193256] [2020-12-02 14:13:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461193256] [2020-12-02 14:13:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012945315] [2020-12-02 14:13:39,755 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:39,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-02 14:13:39,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:39,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-02 14:13:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:40,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:40,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-02 14:13:40,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423772222] [2020-12-02 14:13:40,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-02 14:13:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-02 14:13:40,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-02 14:13:40,056 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2020-12-02 14:13:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:40,232 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-12-02 14:13:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-02 14:13:40,233 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-12-02 14:13:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:40,234 INFO L225 Difference]: With dead ends: 108 [2020-12-02 14:13:40,234 INFO L226 Difference]: Without dead ends: 104 [2020-12-02 14:13:40,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-02 14:13:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-02 14:13:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-02 14:13:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-02 14:13:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-12-02 14:13:40,239 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-12-02 14:13:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:40,240 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-12-02 14:13:40,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-02 14:13:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-12-02 14:13:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-02 14:13:40,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:40,241 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:40,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:40,450 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2020-12-02 14:13:40,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:40,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666814485] [2020-12-02 14:13:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:42,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666814485] [2020-12-02 14:13:42,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488865641] [2020-12-02 14:13:42,031 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:42,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-02 14:13:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:42,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-02 14:13:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:42,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:42,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-02 14:13:42,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40398281] [2020-12-02 14:13:42,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-02 14:13:42,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:42,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-02 14:13:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-02 14:13:42,338 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2020-12-02 14:13:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:42,538 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-02 14:13:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-02 14:13:42,538 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2020-12-02 14:13:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:42,540 INFO L225 Difference]: With dead ends: 110 [2020-12-02 14:13:42,540 INFO L226 Difference]: Without dead ends: 106 [2020-12-02 14:13:42,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-02 14:13:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-02 14:13:42,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-02 14:13:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-02 14:13:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-12-02 14:13:42,544 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-12-02 14:13:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:42,545 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-12-02 14:13:42,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-02 14:13:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-12-02 14:13:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-02 14:13:42,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:42,546 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:42,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-02 14:13:42,761 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2020-12-02 14:13:42,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:42,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050040601] [2020-12-02 14:13:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:44,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050040601] [2020-12-02 14:13:44,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490091476] [2020-12-02 14:13:44,540 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:44,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-02 14:13:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:44,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:44,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-02 14:13:44,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940031706] [2020-12-02 14:13:44,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-02 14:13:44,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-02 14:13:44,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-02 14:13:44,791 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2020-12-02 14:13:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:44,989 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-12-02 14:13:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-02 14:13:44,990 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-12-02 14:13:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:44,992 INFO L225 Difference]: With dead ends: 112 [2020-12-02 14:13:44,992 INFO L226 Difference]: Without dead ends: 108 [2020-12-02 14:13:44,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-02 14:13:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-02 14:13:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-02 14:13:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-02 14:13:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-02 14:13:44,997 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-12-02 14:13:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:44,997 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-02 14:13:44,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-02 14:13:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-02 14:13:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-02 14:13:44,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:44,999 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:45,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-02 14:13:45,215 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:45,216 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2020-12-02 14:13:45,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:45,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548757295] [2020-12-02 14:13:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548757295] [2020-12-02 14:13:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828189136] [2020-12-02 14:13:46,969 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:47,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:13:47,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-02 14:13:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:47,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:47,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-02 14:13:47,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837434296] [2020-12-02 14:13:47,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-02 14:13:47,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-02 14:13:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-02 14:13:47,221 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2020-12-02 14:13:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:47,458 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-12-02 14:13:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-02 14:13:47,459 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-12-02 14:13:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:47,462 INFO L225 Difference]: With dead ends: 114 [2020-12-02 14:13:47,462 INFO L226 Difference]: Without dead ends: 110 [2020-12-02 14:13:47,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-02 14:13:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-02 14:13:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-02 14:13:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-02 14:13:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-12-02 14:13:47,467 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-12-02 14:13:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:47,468 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-12-02 14:13:47,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-02 14:13:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-12-02 14:13:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-02 14:13:47,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:47,469 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:47,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:47,683 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2020-12-02 14:13:47,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:47,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604461465] [2020-12-02 14:13:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:49,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604461465] [2020-12-02 14:13:49,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132688687] [2020-12-02 14:13:49,348 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:49,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-02 14:13:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:49,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-02 14:13:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:49,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:49,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-02 14:13:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534515790] [2020-12-02 14:13:49,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-02 14:13:49,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-02 14:13:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-02 14:13:49,675 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2020-12-02 14:13:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:49,880 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-12-02 14:13:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-02 14:13:49,881 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2020-12-02 14:13:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:49,882 INFO L225 Difference]: With dead ends: 116 [2020-12-02 14:13:49,882 INFO L226 Difference]: Without dead ends: 112 [2020-12-02 14:13:49,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-02 14:13:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-02 14:13:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-02 14:13:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-02 14:13:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-12-02 14:13:49,887 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-12-02 14:13:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:49,887 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-12-02 14:13:49,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-02 14:13:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-12-02 14:13:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-02 14:13:49,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:49,889 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:50,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-02 14:13:50,105 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2020-12-02 14:13:50,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:50,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877501425] [2020-12-02 14:13:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:52,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877501425] [2020-12-02 14:13:52,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621526136] [2020-12-02 14:13:52,121 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:52,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:13:52,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-02 14:13:52,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:52,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:52,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-02 14:13:52,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883085752] [2020-12-02 14:13:52,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-02 14:13:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-02 14:13:52,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-02 14:13:52,391 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2020-12-02 14:13:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:52,622 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-02 14:13:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-02 14:13:52,622 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-02 14:13:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:52,623 INFO L225 Difference]: With dead ends: 118 [2020-12-02 14:13:52,623 INFO L226 Difference]: Without dead ends: 114 [2020-12-02 14:13:52,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-02 14:13:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-02 14:13:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-02 14:13:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-02 14:13:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-12-02 14:13:52,627 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-12-02 14:13:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:52,628 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-12-02 14:13:52,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-02 14:13:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-12-02 14:13:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-02 14:13:52,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:52,629 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:52,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:52,844 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2020-12-02 14:13:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:52,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467215633] [2020-12-02 14:13:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:54,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467215633] [2020-12-02 14:13:54,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437069621] [2020-12-02 14:13:54,769 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:54,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-02 14:13:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:54,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-02 14:13:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:55,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:55,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-02 14:13:55,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291367524] [2020-12-02 14:13:55,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-02 14:13:55,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-02 14:13:55,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-02 14:13:55,079 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2020-12-02 14:13:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:55,314 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-12-02 14:13:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-02 14:13:55,315 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-02 14:13:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:55,316 INFO L225 Difference]: With dead ends: 120 [2020-12-02 14:13:55,316 INFO L226 Difference]: Without dead ends: 116 [2020-12-02 14:13:55,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-02 14:13:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-02 14:13:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-02 14:13:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-02 14:13:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-12-02 14:13:55,319 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-12-02 14:13:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:55,320 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-12-02 14:13:55,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-02 14:13:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-12-02 14:13:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-02 14:13:55,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:55,321 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:55,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-02 14:13:55,522 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:55,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2020-12-02 14:13:55,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:55,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33770223] [2020-12-02 14:13:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:13:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:57,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33770223] [2020-12-02 14:13:57,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415619410] [2020-12-02 14:13:57,577 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:13:57,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-02 14:13:57,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:13:57,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-02 14:13:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:13:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:13:57,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:13:57,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-02 14:13:57,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106952855] [2020-12-02 14:13:57,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-02 14:13:57,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:13:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-02 14:13:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-02 14:13:57,910 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2020-12-02 14:13:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:13:58,112 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-12-02 14:13:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-02 14:13:58,112 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-12-02 14:13:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:13:58,113 INFO L225 Difference]: With dead ends: 122 [2020-12-02 14:13:58,114 INFO L226 Difference]: Without dead ends: 118 [2020-12-02 14:13:58,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-02 14:13:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-02 14:13:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-02 14:13:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-02 14:13:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-12-02 14:13:58,119 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-12-02 14:13:58,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:13:58,119 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-12-02 14:13:58,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-02 14:13:58,119 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-12-02 14:13:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-02 14:13:58,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:13:58,133 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2020-12-02 14:13:58,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-02 14:13:58,347 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:13:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:13:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2020-12-02 14:13:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:13:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745021297] [2020-12-02 14:13:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:13:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:00,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745021297] [2020-12-02 14:14:00,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614998837] [2020-12-02 14:14:00,572 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-02 14:14:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:00,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:00,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-02 14:14:00,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177471445] [2020-12-02 14:14:00,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-02 14:14:00,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:00,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-02 14:14:00,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-02 14:14:00,854 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2020-12-02 14:14:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:01,092 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-12-02 14:14:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-02 14:14:01,092 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2020-12-02 14:14:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:01,094 INFO L225 Difference]: With dead ends: 124 [2020-12-02 14:14:01,094 INFO L226 Difference]: Without dead ends: 120 [2020-12-02 14:14:01,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-02 14:14:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-02 14:14:01,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-02 14:14:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-02 14:14:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-12-02 14:14:01,099 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-12-02 14:14:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:01,100 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-12-02 14:14:01,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-02 14:14:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-12-02 14:14:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-02 14:14:01,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:01,101 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:01,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:01,316 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2020-12-02 14:14:01,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:01,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450768252] [2020-12-02 14:14:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:03,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450768252] [2020-12-02 14:14:03,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186928043] [2020-12-02 14:14:03,597 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:03,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:14:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-02 14:14:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:03,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:03,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-02 14:14:03,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371272015] [2020-12-02 14:14:03,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-02 14:14:03,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-02 14:14:03,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-02 14:14:03,868 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2020-12-02 14:14:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:04,100 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-12-02 14:14:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-02 14:14:04,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2020-12-02 14:14:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:04,102 INFO L225 Difference]: With dead ends: 126 [2020-12-02 14:14:04,102 INFO L226 Difference]: Without dead ends: 122 [2020-12-02 14:14:04,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-02 14:14:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-02 14:14:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-12-02 14:14:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-02 14:14:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-12-02 14:14:04,107 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-12-02 14:14:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:04,108 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-12-02 14:14:04,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-02 14:14:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-12-02 14:14:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-02 14:14:04,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:04,109 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:04,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-02 14:14:04,323 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2020-12-02 14:14:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:04,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132486446] [2020-12-02 14:14:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:06,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132486446] [2020-12-02 14:14:06,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631399812] [2020-12-02 14:14:06,645 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:06,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-02 14:14:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-02 14:14:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:06,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:06,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-02 14:14:06,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060270375] [2020-12-02 14:14:06,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-02 14:14:06,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-02 14:14:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-02 14:14:06,984 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2020-12-02 14:14:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:07,222 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-12-02 14:14:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-02 14:14:07,223 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2020-12-02 14:14:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:07,224 INFO L225 Difference]: With dead ends: 128 [2020-12-02 14:14:07,224 INFO L226 Difference]: Without dead ends: 124 [2020-12-02 14:14:07,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-02 14:14:07,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-02 14:14:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-02 14:14:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-02 14:14:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-12-02 14:14:07,229 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-12-02 14:14:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:07,229 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-12-02 14:14:07,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-02 14:14:07,230 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-12-02 14:14:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-02 14:14:07,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:07,231 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:07,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:07,445 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:07,446 INFO L82 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2020-12-02 14:14:07,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:07,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871751477] [2020-12-02 14:14:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:09,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871751477] [2020-12-02 14:14:09,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209973421] [2020-12-02 14:14:09,921 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:10,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:14:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-02 14:14:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:10,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:10,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-02 14:14:10,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530586678] [2020-12-02 14:14:10,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-02 14:14:10,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:10,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-02 14:14:10,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-02 14:14:10,231 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2020-12-02 14:14:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:10,485 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-12-02 14:14:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-02 14:14:10,486 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-12-02 14:14:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:10,487 INFO L225 Difference]: With dead ends: 130 [2020-12-02 14:14:10,488 INFO L226 Difference]: Without dead ends: 126 [2020-12-02 14:14:10,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-02 14:14:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-02 14:14:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-12-02 14:14:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-02 14:14:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-12-02 14:14:10,494 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-12-02 14:14:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:10,494 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-12-02 14:14:10,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-02 14:14:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-12-02 14:14:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-02 14:14:10,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:10,496 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:10,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-02 14:14:10,711 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2020-12-02 14:14:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:10,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021813208] [2020-12-02 14:14:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:13,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021813208] [2020-12-02 14:14:13,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754838533] [2020-12-02 14:14:13,271 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:13,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-02 14:14:13,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:13,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-02 14:14:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:13,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:13,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-02 14:14:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195615569] [2020-12-02 14:14:13,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-02 14:14:13,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-02 14:14:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-02 14:14:13,607 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2020-12-02 14:14:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:13,905 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-12-02 14:14:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-02 14:14:13,906 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2020-12-02 14:14:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:13,907 INFO L225 Difference]: With dead ends: 132 [2020-12-02 14:14:13,907 INFO L226 Difference]: Without dead ends: 128 [2020-12-02 14:14:13,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-02 14:14:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-02 14:14:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-02 14:14:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-02 14:14:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-12-02 14:14:13,912 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-12-02 14:14:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:13,912 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-12-02 14:14:13,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-02 14:14:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-12-02 14:14:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-02 14:14:13,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:13,914 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:14,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-02 14:14:14,128 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1789552347, now seen corresponding path program 60 times [2020-12-02 14:14:14,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:14,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126922471] [2020-12-02 14:14:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:16,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126922471] [2020-12-02 14:14:16,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456204719] [2020-12-02 14:14:16,728 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:16,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-02 14:14:16,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-02 14:14:16,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:17,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:17,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-02 14:14:17,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464977168] [2020-12-02 14:14:17,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-02 14:14:17,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-02 14:14:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-02 14:14:17,102 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2020-12-02 14:14:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:17,420 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-12-02 14:14:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-02 14:14:17,421 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2020-12-02 14:14:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:17,422 INFO L225 Difference]: With dead ends: 134 [2020-12-02 14:14:17,422 INFO L226 Difference]: Without dead ends: 130 [2020-12-02 14:14:17,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-02 14:14:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-02 14:14:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-02 14:14:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-02 14:14:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-12-02 14:14:17,427 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-12-02 14:14:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:17,428 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-12-02 14:14:17,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-02 14:14:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-12-02 14:14:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-02 14:14:17,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:17,429 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:17,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:17,642 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1719654745, now seen corresponding path program 61 times [2020-12-02 14:14:17,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:17,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709723359] [2020-12-02 14:14:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:20,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709723359] [2020-12-02 14:14:20,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904618852] [2020-12-02 14:14:20,320 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-02 14:14:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:20,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:20,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-02 14:14:20,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483903123] [2020-12-02 14:14:20,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-02 14:14:20,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-02 14:14:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-02 14:14:20,635 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2020-12-02 14:14:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:20,900 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-12-02 14:14:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-02 14:14:20,901 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2020-12-02 14:14:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:20,902 INFO L225 Difference]: With dead ends: 136 [2020-12-02 14:14:20,902 INFO L226 Difference]: Without dead ends: 132 [2020-12-02 14:14:20,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-02 14:14:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-02 14:14:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-02 14:14:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-02 14:14:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-12-02 14:14:20,908 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-12-02 14:14:20,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:20,908 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-12-02 14:14:20,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-02 14:14:20,908 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-12-02 14:14:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-02 14:14:20,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:20,909 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:21,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:21,125 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1027431337, now seen corresponding path program 62 times [2020-12-02 14:14:21,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:21,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4115996] [2020-12-02 14:14:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:23,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4115996] [2020-12-02 14:14:23,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347080644] [2020-12-02 14:14:23,956 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:24,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:14:24,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:24,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-02 14:14:24,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:24,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:24,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-02 14:14:24,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42330305] [2020-12-02 14:14:24,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-02 14:14:24,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:24,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-02 14:14:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-02 14:14:24,273 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2020-12-02 14:14:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:24,564 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-12-02 14:14:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-02 14:14:24,564 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2020-12-02 14:14:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:24,565 INFO L225 Difference]: With dead ends: 138 [2020-12-02 14:14:24,565 INFO L226 Difference]: Without dead ends: 134 [2020-12-02 14:14:24,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-02 14:14:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-02 14:14:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-12-02 14:14:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-02 14:14:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-12-02 14:14:24,570 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-12-02 14:14:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:24,571 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-12-02 14:14:24,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-02 14:14:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-12-02 14:14:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-02 14:14:24,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:24,572 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:24,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:24,781 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash -427730901, now seen corresponding path program 63 times [2020-12-02 14:14:24,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:24,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896778102] [2020-12-02 14:14:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:27,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896778102] [2020-12-02 14:14:27,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928074371] [2020-12-02 14:14:27,708 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:27,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-02 14:14:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:27,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-02 14:14:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:28,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:28,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-02 14:14:28,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025599604] [2020-12-02 14:14:28,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-02 14:14:28,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-02 14:14:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-02 14:14:28,124 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2020-12-02 14:14:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:28,418 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-12-02 14:14:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-02 14:14:28,420 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2020-12-02 14:14:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:28,421 INFO L225 Difference]: With dead ends: 140 [2020-12-02 14:14:28,421 INFO L226 Difference]: Without dead ends: 136 [2020-12-02 14:14:28,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-02 14:14:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-02 14:14:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-12-02 14:14:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-02 14:14:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-12-02 14:14:28,426 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-12-02 14:14:28,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:28,427 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-12-02 14:14:28,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-02 14:14:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-12-02 14:14:28,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-02 14:14:28,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:28,428 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:28,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:28,644 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1320696877, now seen corresponding path program 64 times [2020-12-02 14:14:28,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:28,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290505372] [2020-12-02 14:14:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290505372] [2020-12-02 14:14:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718546831] [2020-12-02 14:14:31,703 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:31,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:14:31,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-02 14:14:31,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:32,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:32,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-02 14:14:32,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149341593] [2020-12-02 14:14:32,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-02 14:14:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-02 14:14:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-02 14:14:32,031 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2020-12-02 14:14:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:32,303 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-12-02 14:14:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-02 14:14:32,303 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2020-12-02 14:14:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:32,307 INFO L225 Difference]: With dead ends: 142 [2020-12-02 14:14:32,307 INFO L226 Difference]: Without dead ends: 138 [2020-12-02 14:14:32,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-02 14:14:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-02 14:14:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-02 14:14:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-02 14:14:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-12-02 14:14:32,312 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-12-02 14:14:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:32,313 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-12-02 14:14:32,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-02 14:14:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-12-02 14:14:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-02 14:14:32,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:32,314 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:32,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:32,528 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2067388497, now seen corresponding path program 65 times [2020-12-02 14:14:32,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:32,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819618511] [2020-12-02 14:14:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:35,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819618511] [2020-12-02 14:14:35,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421193099] [2020-12-02 14:14:35,658 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:35,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-02 14:14:35,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-02 14:14:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:36,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:36,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-02 14:14:36,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221059067] [2020-12-02 14:14:36,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-02 14:14:36,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:36,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-02 14:14:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-02 14:14:36,043 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2020-12-02 14:14:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:36,295 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-12-02 14:14:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-02 14:14:36,296 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2020-12-02 14:14:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:36,298 INFO L225 Difference]: With dead ends: 144 [2020-12-02 14:14:36,298 INFO L226 Difference]: Without dead ends: 140 [2020-12-02 14:14:36,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-02 14:14:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-02 14:14:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-02 14:14:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-02 14:14:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-12-02 14:14:36,303 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-12-02 14:14:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:36,304 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-12-02 14:14:36,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-02 14:14:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-12-02 14:14:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-02 14:14:36,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:36,305 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:36,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-02 14:14:36,520 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:36,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1862744753, now seen corresponding path program 66 times [2020-12-02 14:14:36,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:36,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592727553] [2020-12-02 14:14:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:39,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592727553] [2020-12-02 14:14:39,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658862646] [2020-12-02 14:14:39,719 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:39,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-02 14:14:39,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:39,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-02 14:14:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:40,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:40,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-02 14:14:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454409183] [2020-12-02 14:14:40,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-02 14:14:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-02 14:14:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-02 14:14:40,148 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2020-12-02 14:14:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:40,443 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-12-02 14:14:40,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-02 14:14:40,444 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2020-12-02 14:14:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:40,445 INFO L225 Difference]: With dead ends: 146 [2020-12-02 14:14:40,445 INFO L226 Difference]: Without dead ends: 142 [2020-12-02 14:14:40,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-02 14:14:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-02 14:14:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-02 14:14:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-02 14:14:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-12-02 14:14:40,450 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-12-02 14:14:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:40,451 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-12-02 14:14:40,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-02 14:14:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-12-02 14:14:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-02 14:14:40,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:40,452 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:40,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-02 14:14:40,667 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash -850422477, now seen corresponding path program 67 times [2020-12-02 14:14:40,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:40,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352560555] [2020-12-02 14:14:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352560555] [2020-12-02 14:14:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333929298] [2020-12-02 14:14:43,990 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-02 14:14:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:44,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:44,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-02 14:14:44,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316058527] [2020-12-02 14:14:44,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-02 14:14:44,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:44,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-02 14:14:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-02 14:14:44,315 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2020-12-02 14:14:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:44,618 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-12-02 14:14:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-02 14:14:44,618 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2020-12-02 14:14:44,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:44,619 INFO L225 Difference]: With dead ends: 148 [2020-12-02 14:14:44,620 INFO L226 Difference]: Without dead ends: 144 [2020-12-02 14:14:44,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-02 14:14:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-02 14:14:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-02 14:14:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-02 14:14:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-12-02 14:14:44,624 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-12-02 14:14:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:44,625 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-12-02 14:14:44,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-02 14:14:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-12-02 14:14:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-02 14:14:44,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:44,626 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:44,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:44,841 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:44,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1158981835, now seen corresponding path program 68 times [2020-12-02 14:14:44,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:44,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634839706] [2020-12-02 14:14:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:48,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634839706] [2020-12-02 14:14:48,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990220626] [2020-12-02 14:14:48,221 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:48,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:14:48,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-02 14:14:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:48,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:48,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-02 14:14:48,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923493390] [2020-12-02 14:14:48,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-02 14:14:48,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-02 14:14:48,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-02 14:14:48,551 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2020-12-02 14:14:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:48,879 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-12-02 14:14:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-02 14:14:48,880 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-12-02 14:14:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:48,881 INFO L225 Difference]: With dead ends: 150 [2020-12-02 14:14:48,881 INFO L226 Difference]: Without dead ends: 146 [2020-12-02 14:14:48,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-02 14:14:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-02 14:14:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-02 14:14:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-02 14:14:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-12-02 14:14:48,886 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-12-02 14:14:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:48,886 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-12-02 14:14:48,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-02 14:14:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-12-02 14:14:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-02 14:14:48,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:48,888 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:49,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-02 14:14:49,103 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:49,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1331781449, now seen corresponding path program 69 times [2020-12-02 14:14:49,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:49,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188376971] [2020-12-02 14:14:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:52,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188376971] [2020-12-02 14:14:52,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039477570] [2020-12-02 14:14:52,455 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:52,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-02 14:14:52,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:52,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-02 14:14:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:52,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:52,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-02 14:14:52,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191844975] [2020-12-02 14:14:52,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-02 14:14:52,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-02 14:14:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-02 14:14:52,880 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2020-12-02 14:14:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:53,225 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-12-02 14:14:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-02 14:14:53,225 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2020-12-02 14:14:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:53,226 INFO L225 Difference]: With dead ends: 152 [2020-12-02 14:14:53,226 INFO L226 Difference]: Without dead ends: 148 [2020-12-02 14:14:53,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-02 14:14:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-02 14:14:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-02 14:14:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-02 14:14:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-12-02 14:14:53,231 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-12-02 14:14:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:53,231 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-12-02 14:14:53,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-02 14:14:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-12-02 14:14:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-02 14:14:53,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:53,233 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:53,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-02 14:14:53,447 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:53,447 INFO L82 PathProgramCache]: Analyzing trace with hash 111514041, now seen corresponding path program 70 times [2020-12-02 14:14:53,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:53,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911850158] [2020-12-02 14:14:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:14:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:57,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911850158] [2020-12-02 14:14:57,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768795057] [2020-12-02 14:14:57,021 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:14:57,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:14:57,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:14:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-02 14:14:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:14:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:14:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:14:57,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-02 14:14:57,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129066273] [2020-12-02 14:14:57,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-02 14:14:57,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:14:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-02 14:14:57,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-02 14:14:57,376 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2020-12-02 14:14:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:14:57,686 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-12-02 14:14:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-02 14:14:57,687 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2020-12-02 14:14:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:14:57,688 INFO L225 Difference]: With dead ends: 154 [2020-12-02 14:14:57,688 INFO L226 Difference]: Without dead ends: 150 [2020-12-02 14:14:57,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-02 14:14:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-02 14:14:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-12-02 14:14:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-02 14:14:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-12-02 14:14:57,693 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-12-02 14:14:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:14:57,693 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-12-02 14:14:57,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-02 14:14:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-12-02 14:14:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-02 14:14:57,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:14:57,694 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2020-12-02 14:14:57,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-02 14:14:57,910 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:14:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:14:57,911 INFO L82 PathProgramCache]: Analyzing trace with hash -155956677, now seen corresponding path program 71 times [2020-12-02 14:14:57,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:14:57,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686652486] [2020-12-02 14:14:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:14:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:01,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686652486] [2020-12-02 14:15:01,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812843785] [2020-12-02 14:15:01,609 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:01,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-02 14:15:01,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:01,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-02 14:15:01,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:02,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:02,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-02 14:15:02,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282973954] [2020-12-02 14:15:02,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-02 14:15:02,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-02 14:15:02,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-02 14:15:02,017 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2020-12-02 14:15:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:02,422 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-12-02 14:15:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-02 14:15:02,423 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2020-12-02 14:15:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:02,424 INFO L225 Difference]: With dead ends: 156 [2020-12-02 14:15:02,424 INFO L226 Difference]: Without dead ends: 152 [2020-12-02 14:15:02,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-02 14:15:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-02 14:15:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-02 14:15:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-02 14:15:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-12-02 14:15:02,429 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-12-02 14:15:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:02,430 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-12-02 14:15:02,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-02 14:15:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-12-02 14:15:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-02 14:15:02,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:02,431 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:02,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:02,643 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:02,643 INFO L82 PathProgramCache]: Analyzing trace with hash 502721085, now seen corresponding path program 72 times [2020-12-02 14:15:02,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:02,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297796007] [2020-12-02 14:15:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:06,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297796007] [2020-12-02 14:15:06,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995714264] [2020-12-02 14:15:06,451 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:06,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-02 14:15:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:06,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-02 14:15:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:06,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:06,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-02 14:15:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088640995] [2020-12-02 14:15:06,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-02 14:15:06,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-02 14:15:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-02 14:15:06,888 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2020-12-02 14:15:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:07,197 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-12-02 14:15:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-02 14:15:07,198 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2020-12-02 14:15:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:07,200 INFO L225 Difference]: With dead ends: 158 [2020-12-02 14:15:07,200 INFO L226 Difference]: Without dead ends: 154 [2020-12-02 14:15:07,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-02 14:15:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-02 14:15:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-02 14:15:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-02 14:15:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-12-02 14:15:07,205 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-12-02 14:15:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:07,206 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-12-02 14:15:07,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-02 14:15:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-12-02 14:15:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-02 14:15:07,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:07,207 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:07,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:07,421 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2131857855, now seen corresponding path program 73 times [2020-12-02 14:15:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888776061] [2020-12-02 14:15:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:11,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888776061] [2020-12-02 14:15:11,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263037275] [2020-12-02 14:15:11,357 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-02 14:15:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:11,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:11,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-02 14:15:11,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270669576] [2020-12-02 14:15:11,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-02 14:15:11,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:11,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-02 14:15:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-02 14:15:11,702 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2020-12-02 14:15:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:12,054 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-12-02 14:15:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-02 14:15:12,055 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2020-12-02 14:15:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:12,056 INFO L225 Difference]: With dead ends: 160 [2020-12-02 14:15:12,056 INFO L226 Difference]: Without dead ends: 156 [2020-12-02 14:15:12,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-02 14:15:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-02 14:15:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-02 14:15:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-02 14:15:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-12-02 14:15:12,061 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-12-02 14:15:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:12,061 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-12-02 14:15:12,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-02 14:15:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-12-02 14:15:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-02 14:15:12,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:12,063 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:12,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:12,277 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash 69230785, now seen corresponding path program 74 times [2020-12-02 14:15:12,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:12,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632897458] [2020-12-02 14:15:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:16,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632897458] [2020-12-02 14:15:16,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364713130] [2020-12-02 14:15:16,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:16,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:15:16,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:16,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-02 14:15:16,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:16,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:16,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-02 14:15:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230631018] [2020-12-02 14:15:16,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-02 14:15:16,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:16,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-02 14:15:16,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-02 14:15:16,622 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2020-12-02 14:15:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:16,985 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-12-02 14:15:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-02 14:15:16,986 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2020-12-02 14:15:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:16,986 INFO L225 Difference]: With dead ends: 162 [2020-12-02 14:15:16,986 INFO L226 Difference]: Without dead ends: 158 [2020-12-02 14:15:16,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-02 14:15:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-02 14:15:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-12-02 14:15:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-02 14:15:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-12-02 14:15:16,990 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-12-02 14:15:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:16,991 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-12-02 14:15:16,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-02 14:15:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-12-02 14:15:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-02 14:15:16,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:16,992 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:17,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-02 14:15:17,209 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2135460029, now seen corresponding path program 75 times [2020-12-02 14:15:17,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:17,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144038642] [2020-12-02 14:15:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:21,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144038642] [2020-12-02 14:15:21,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121122577] [2020-12-02 14:15:21,318 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:21,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-02 14:15:21,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-02 14:15:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:21,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:21,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-02 14:15:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460651903] [2020-12-02 14:15:21,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-02 14:15:21,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:21,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-02 14:15:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-02 14:15:21,777 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2020-12-02 14:15:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:22,156 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-12-02 14:15:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-02 14:15:22,157 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2020-12-02 14:15:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:22,158 INFO L225 Difference]: With dead ends: 164 [2020-12-02 14:15:22,159 INFO L226 Difference]: Without dead ends: 160 [2020-12-02 14:15:22,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-02 14:15:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-02 14:15:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-12-02 14:15:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-02 14:15:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-12-02 14:15:22,164 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-12-02 14:15:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:22,164 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-12-02 14:15:22,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-02 14:15:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-12-02 14:15:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-02 14:15:22,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:22,166 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:22,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:22,375 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:22,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:22,376 INFO L82 PathProgramCache]: Analyzing trace with hash 870511941, now seen corresponding path program 76 times [2020-12-02 14:15:22,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:22,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48920603] [2020-12-02 14:15:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:26,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48920603] [2020-12-02 14:15:26,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38516632] [2020-12-02 14:15:26,584 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:26,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:15:26,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-02 14:15:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:26,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:26,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-02 14:15:26,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26448040] [2020-12-02 14:15:26,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-02 14:15:26,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-02 14:15:26,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-02 14:15:26,946 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2020-12-02 14:15:27,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:27,326 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-12-02 14:15:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-02 14:15:27,331 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2020-12-02 14:15:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:27,332 INFO L225 Difference]: With dead ends: 166 [2020-12-02 14:15:27,333 INFO L226 Difference]: Without dead ends: 162 [2020-12-02 14:15:27,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-02 14:15:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-02 14:15:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-12-02 14:15:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-02 14:15:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-12-02 14:15:27,337 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-12-02 14:15:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:27,338 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-12-02 14:15:27,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-02 14:15:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-12-02 14:15:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-02 14:15:27,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:27,339 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:27,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:27,554 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash -903415097, now seen corresponding path program 77 times [2020-12-02 14:15:27,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:27,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934158253] [2020-12-02 14:15:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:31,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934158253] [2020-12-02 14:15:31,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133390594] [2020-12-02 14:15:31,916 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:32,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-02 14:15:32,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-02 14:15:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:32,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:32,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-02 14:15:32,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523045181] [2020-12-02 14:15:32,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-02 14:15:32,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:32,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-02 14:15:32,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-02 14:15:32,342 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2020-12-02 14:15:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:32,774 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-12-02 14:15:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-02 14:15:32,774 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2020-12-02 14:15:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:32,775 INFO L225 Difference]: With dead ends: 168 [2020-12-02 14:15:32,775 INFO L226 Difference]: Without dead ends: 164 [2020-12-02 14:15:32,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-02 14:15:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-02 14:15:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-12-02 14:15:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-02 14:15:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-12-02 14:15:32,780 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-12-02 14:15:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:32,781 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-12-02 14:15:32,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-02 14:15:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-12-02 14:15:32,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-02 14:15:32,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:32,782 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:32,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-02 14:15:32,997 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:32,998 INFO L82 PathProgramCache]: Analyzing trace with hash -545282103, now seen corresponding path program 78 times [2020-12-02 14:15:32,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:32,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592953811] [2020-12-02 14:15:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:37,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592953811] [2020-12-02 14:15:37,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264042635] [2020-12-02 14:15:37,406 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:37,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-02 14:15:37,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-02 14:15:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:37,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:37,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-02 14:15:37,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600041008] [2020-12-02 14:15:37,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-02 14:15:37,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-02 14:15:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-02 14:15:37,869 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2020-12-02 14:15:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:38,322 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-12-02 14:15:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-02 14:15:38,323 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2020-12-02 14:15:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:38,324 INFO L225 Difference]: With dead ends: 170 [2020-12-02 14:15:38,324 INFO L226 Difference]: Without dead ends: 166 [2020-12-02 14:15:38,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-02 14:15:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-02 14:15:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-12-02 14:15:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-02 14:15:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-12-02 14:15:38,327 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-12-02 14:15:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:38,327 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-12-02 14:15:38,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-02 14:15:38,327 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-12-02 14:15:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-02 14:15:38,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:38,328 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:38,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-02 14:15:38,544 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash 23141451, now seen corresponding path program 79 times [2020-12-02 14:15:38,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:38,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040200464] [2020-12-02 14:15:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:43,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040200464] [2020-12-02 14:15:43,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463894201] [2020-12-02 14:15:43,097 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-02 14:15:43,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:43,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:43,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-02 14:15:43,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095509926] [2020-12-02 14:15:43,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-02 14:15:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:43,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-02 14:15:43,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-02 14:15:43,456 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2020-12-02 14:15:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:43,819 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2020-12-02 14:15:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-02 14:15:43,820 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2020-12-02 14:15:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:43,821 INFO L225 Difference]: With dead ends: 172 [2020-12-02 14:15:43,822 INFO L226 Difference]: Without dead ends: 168 [2020-12-02 14:15:43,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-02 14:15:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-02 14:15:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-02 14:15:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-02 14:15:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-12-02 14:15:43,825 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-12-02 14:15:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:43,826 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-12-02 14:15:43,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-02 14:15:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-12-02 14:15:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-02 14:15:43,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:43,827 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:44,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:44,028 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash 817330253, now seen corresponding path program 80 times [2020-12-02 14:15:44,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:44,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348601383] [2020-12-02 14:15:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:48,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348601383] [2020-12-02 14:15:48,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475167917] [2020-12-02 14:15:48,737 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:48,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:15:48,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-02 14:15:48,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:49,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:49,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-02 14:15:49,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393264539] [2020-12-02 14:15:49,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-02 14:15:49,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-02 14:15:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-02 14:15:49,122 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2020-12-02 14:15:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:49,526 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-12-02 14:15:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-02 14:15:49,527 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2020-12-02 14:15:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:49,528 INFO L225 Difference]: With dead ends: 174 [2020-12-02 14:15:49,528 INFO L226 Difference]: Without dead ends: 170 [2020-12-02 14:15:49,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-02 14:15:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-02 14:15:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-12-02 14:15:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-02 14:15:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-12-02 14:15:49,532 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-12-02 14:15:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:49,532 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-12-02 14:15:49,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-02 14:15:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-12-02 14:15:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-02 14:15:49,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:49,533 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:49,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:49,734 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:49,735 INFO L82 PathProgramCache]: Analyzing trace with hash -471409713, now seen corresponding path program 81 times [2020-12-02 14:15:49,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:49,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264898208] [2020-12-02 14:15:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:15:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264898208] [2020-12-02 14:15:54,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51516935] [2020-12-02 14:15:54,468 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:54,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-02 14:15:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:15:54,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-02 14:15:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:15:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:15:54,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:15:54,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-02 14:15:54,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794043339] [2020-12-02 14:15:54,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-02 14:15:54,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:15:54,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-02 14:15:54,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-02 14:15:54,935 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2020-12-02 14:15:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:15:55,386 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-12-02 14:15:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-02 14:15:55,386 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2020-12-02 14:15:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:15:55,387 INFO L225 Difference]: With dead ends: 176 [2020-12-02 14:15:55,387 INFO L226 Difference]: Without dead ends: 172 [2020-12-02 14:15:55,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-02 14:15:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-02 14:15:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-12-02 14:15:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-02 14:15:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-12-02 14:15:55,393 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-12-02 14:15:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:15:55,393 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-12-02 14:15:55,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-02 14:15:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-12-02 14:15:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-02 14:15:55,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:15:55,395 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2020-12-02 14:15:55,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:15:55,609 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:15:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:15:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1999935791, now seen corresponding path program 82 times [2020-12-02 14:15:55,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:15:55,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119331255] [2020-12-02 14:15:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:15:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:00,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119331255] [2020-12-02 14:16:00,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442390988] [2020-12-02 14:16:00,552 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:00,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:16:00,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-02 14:16:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:00,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:00,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-02 14:16:00,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172253341] [2020-12-02 14:16:00,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-02 14:16:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-02 14:16:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-02 14:16:00,922 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2020-12-02 14:16:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:01,357 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-12-02 14:16:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-02 14:16:01,358 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2020-12-02 14:16:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:01,359 INFO L225 Difference]: With dead ends: 178 [2020-12-02 14:16:01,359 INFO L226 Difference]: Without dead ends: 174 [2020-12-02 14:16:01,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-02 14:16:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-02 14:16:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-12-02 14:16:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-02 14:16:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-12-02 14:16:01,364 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-12-02 14:16:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:01,365 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-12-02 14:16:01,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-02 14:16:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-12-02 14:16:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-02 14:16:01,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:01,366 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:01,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:01,580 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2034681517, now seen corresponding path program 83 times [2020-12-02 14:16:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:01,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030790821] [2020-12-02 14:16:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030790821] [2020-12-02 14:16:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060307240] [2020-12-02 14:16:06,667 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:06,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-02 14:16:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:06,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-02 14:16:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:07,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:07,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-02 14:16:07,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170780094] [2020-12-02 14:16:07,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-02 14:16:07,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:07,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-02 14:16:07,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-02 14:16:07,123 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2020-12-02 14:16:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:07,491 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-12-02 14:16:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-02 14:16:07,492 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2020-12-02 14:16:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:07,493 INFO L225 Difference]: With dead ends: 180 [2020-12-02 14:16:07,494 INFO L226 Difference]: Without dead ends: 176 [2020-12-02 14:16:07,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-02 14:16:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-02 14:16:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-02 14:16:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-02 14:16:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-12-02 14:16:07,498 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-12-02 14:16:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:07,498 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-12-02 14:16:07,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-02 14:16:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-12-02 14:16:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-02 14:16:07,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:07,500 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:07,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:07,714 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:07,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1065585835, now seen corresponding path program 84 times [2020-12-02 14:16:07,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:07,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079064944] [2020-12-02 14:16:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:13,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079064944] [2020-12-02 14:16:13,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141838561] [2020-12-02 14:16:13,001 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:13,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-02 14:16:13,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:13,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-02 14:16:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:13,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:13,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-02 14:16:13,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414734049] [2020-12-02 14:16:13,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-02 14:16:13,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-02 14:16:13,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-02 14:16:13,514 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2020-12-02 14:16:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:13,958 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-12-02 14:16:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-02 14:16:13,959 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2020-12-02 14:16:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:13,960 INFO L225 Difference]: With dead ends: 182 [2020-12-02 14:16:13,960 INFO L226 Difference]: Without dead ends: 178 [2020-12-02 14:16:13,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-02 14:16:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-02 14:16:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-02 14:16:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-02 14:16:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-12-02 14:16:13,964 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-12-02 14:16:13,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:13,965 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-12-02 14:16:13,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-02 14:16:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-12-02 14:16:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-02 14:16:13,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:13,966 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:14,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-02 14:16:14,181 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1772538665, now seen corresponding path program 85 times [2020-12-02 14:16:14,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:14,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959203631] [2020-12-02 14:16:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:19,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959203631] [2020-12-02 14:16:19,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070189200] [2020-12-02 14:16:19,685 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-02 14:16:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:20,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:20,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-02 14:16:20,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12473231] [2020-12-02 14:16:20,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-02 14:16:20,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-02 14:16:20,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-02 14:16:20,097 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2020-12-02 14:16:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:20,572 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-12-02 14:16:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-02 14:16:20,572 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2020-12-02 14:16:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:20,574 INFO L225 Difference]: With dead ends: 184 [2020-12-02 14:16:20,574 INFO L226 Difference]: Without dead ends: 180 [2020-12-02 14:16:20,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-02 14:16:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-02 14:16:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-02 14:16:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-02 14:16:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-12-02 14:16:20,577 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-12-02 14:16:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:20,578 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-12-02 14:16:20,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-02 14:16:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-12-02 14:16:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-02 14:16:20,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:20,579 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:20,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:20,780 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1745591769, now seen corresponding path program 86 times [2020-12-02 14:16:20,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:20,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303990752] [2020-12-02 14:16:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:26,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303990752] [2020-12-02 14:16:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386768960] [2020-12-02 14:16:26,279 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:26,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:16:26,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:26,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-02 14:16:26,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:26,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:26,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-02 14:16:26,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613849596] [2020-12-02 14:16:26,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-02 14:16:26,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-02 14:16:26,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-02 14:16:26,697 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2020-12-02 14:16:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:27,215 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-12-02 14:16:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-02 14:16:27,216 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2020-12-02 14:16:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:27,217 INFO L225 Difference]: With dead ends: 186 [2020-12-02 14:16:27,217 INFO L226 Difference]: Without dead ends: 182 [2020-12-02 14:16:27,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-02 14:16:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-02 14:16:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-02 14:16:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-02 14:16:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-12-02 14:16:27,220 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-12-02 14:16:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:27,220 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-12-02 14:16:27,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-02 14:16:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-12-02 14:16:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-02 14:16:27,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:27,221 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:27,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-12-02 14:16:27,423 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1765290405, now seen corresponding path program 87 times [2020-12-02 14:16:27,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:27,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584545441] [2020-12-02 14:16:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:33,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584545441] [2020-12-02 14:16:33,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615646127] [2020-12-02 14:16:33,137 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:33,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2020-12-02 14:16:33,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-02 14:16:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:33,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:33,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2020-12-02 14:16:33,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737464264] [2020-12-02 14:16:33,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-02 14:16:33,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:33,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-02 14:16:33,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-02 14:16:33,668 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2020-12-02 14:16:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:34,168 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-12-02 14:16:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-02 14:16:34,168 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2020-12-02 14:16:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:34,169 INFO L225 Difference]: With dead ends: 188 [2020-12-02 14:16:34,169 INFO L226 Difference]: Without dead ends: 184 [2020-12-02 14:16:34,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-02 14:16:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-02 14:16:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-12-02 14:16:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-02 14:16:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-12-02 14:16:34,172 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-12-02 14:16:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:34,173 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-12-02 14:16:34,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-02 14:16:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-12-02 14:16:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-02 14:16:34,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:34,173 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:34,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-02 14:16:34,374 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:34,375 INFO L82 PathProgramCache]: Analyzing trace with hash 121235037, now seen corresponding path program 88 times [2020-12-02 14:16:34,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:34,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679512892] [2020-12-02 14:16:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679512892] [2020-12-02 14:16:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101757493] [2020-12-02 14:16:40,256 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:40,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:16:40,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:40,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-02 14:16:40,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:40,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:40,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2020-12-02 14:16:40,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304542511] [2020-12-02 14:16:40,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-02 14:16:40,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:40,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-02 14:16:40,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-02 14:16:40,688 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2020-12-02 14:16:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:41,124 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-12-02 14:16:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-02 14:16:41,125 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2020-12-02 14:16:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:41,126 INFO L225 Difference]: With dead ends: 190 [2020-12-02 14:16:41,126 INFO L226 Difference]: Without dead ends: 186 [2020-12-02 14:16:41,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-02 14:16:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-02 14:16:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-12-02 14:16:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-02 14:16:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-12-02 14:16:41,130 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-12-02 14:16:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:41,130 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-12-02 14:16:41,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-02 14:16:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-12-02 14:16:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-02 14:16:41,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:41,132 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:41,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:41,345 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash 595985887, now seen corresponding path program 89 times [2020-12-02 14:16:41,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:41,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689342304] [2020-12-02 14:16:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:47,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689342304] [2020-12-02 14:16:47,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172051902] [2020-12-02 14:16:47,331 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:47,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2020-12-02 14:16:47,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-02 14:16:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:47,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:47,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2020-12-02 14:16:47,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644902700] [2020-12-02 14:16:47,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-02 14:16:47,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-02 14:16:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-02 14:16:47,816 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2020-12-02 14:16:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:48,289 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2020-12-02 14:16:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-02 14:16:48,290 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2020-12-02 14:16:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:48,291 INFO L225 Difference]: With dead ends: 192 [2020-12-02 14:16:48,292 INFO L226 Difference]: Without dead ends: 188 [2020-12-02 14:16:48,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-02 14:16:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-02 14:16:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-02 14:16:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-02 14:16:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-12-02 14:16:48,296 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-12-02 14:16:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:48,297 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-12-02 14:16:48,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-02 14:16:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-12-02 14:16:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-02 14:16:48,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:48,298 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:48,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:48,511 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1565019361, now seen corresponding path program 90 times [2020-12-02 14:16:48,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:48,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795594480] [2020-12-02 14:16:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:16:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:55,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795594480] [2020-12-02 14:16:55,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869996241] [2020-12-02 14:16:55,077 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:55,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2020-12-02 14:16:55,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:16:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-02 14:16:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:16:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:16:55,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:16:55,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2020-12-02 14:16:55,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794179742] [2020-12-02 14:16:55,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-02 14:16:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:16:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-02 14:16:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-02 14:16:55,637 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2020-12-02 14:16:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:16:56,181 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2020-12-02 14:16:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-02 14:16:56,182 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2020-12-02 14:16:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:16:56,183 INFO L225 Difference]: With dead ends: 194 [2020-12-02 14:16:56,183 INFO L226 Difference]: Without dead ends: 190 [2020-12-02 14:16:56,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-02 14:16:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-02 14:16:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-12-02 14:16:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-02 14:16:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-12-02 14:16:56,186 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-12-02 14:16:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:16:56,187 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-12-02 14:16:56,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-02 14:16:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-12-02 14:16:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-02 14:16:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:16:56,187 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2020-12-02 14:16:56,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:16:56,389 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:16:56,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:16:56,389 INFO L82 PathProgramCache]: Analyzing trace with hash 798284643, now seen corresponding path program 91 times [2020-12-02 14:16:56,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:16:56,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457691923] [2020-12-02 14:16:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:16:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:02,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457691923] [2020-12-02 14:17:02,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715238965] [2020-12-02 14:17:02,780 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-02 14:17:02,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:17:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:03,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:17:03,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2020-12-02 14:17:03,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135813308] [2020-12-02 14:17:03,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-12-02 14:17:03,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:17:03,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-12-02 14:17:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-12-02 14:17:03,213 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2020-12-02 14:17:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:17:03,706 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-12-02 14:17:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-02 14:17:03,707 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2020-12-02 14:17:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:17:03,708 INFO L225 Difference]: With dead ends: 196 [2020-12-02 14:17:03,708 INFO L226 Difference]: Without dead ends: 192 [2020-12-02 14:17:03,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-12-02 14:17:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-02 14:17:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-12-02 14:17:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-02 14:17:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2020-12-02 14:17:03,712 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2020-12-02 14:17:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:17:03,712 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2020-12-02 14:17:03,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-12-02 14:17:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2020-12-02 14:17:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-02 14:17:03,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:17:03,713 INFO L422 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1] [2020-12-02 14:17:03,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:03,914 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:17:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:17:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1594371739, now seen corresponding path program 92 times [2020-12-02 14:17:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:17:03,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388612699] [2020-12-02 14:17:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:17:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:10,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388612699] [2020-12-02 14:17:10,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753018138] [2020-12-02 14:17:10,543 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:10,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:17:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:17:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-02 14:17:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:17:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:10,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:17:10,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2020-12-02 14:17:10,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610502806] [2020-12-02 14:17:10,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-12-02 14:17:10,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:17:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-12-02 14:17:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-12-02 14:17:10,992 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2020-12-02 14:17:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:17:11,496 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-12-02 14:17:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-12-02 14:17:11,497 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2020-12-02 14:17:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:17:11,498 INFO L225 Difference]: With dead ends: 198 [2020-12-02 14:17:11,498 INFO L226 Difference]: Without dead ends: 194 [2020-12-02 14:17:11,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-12-02 14:17:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-02 14:17:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-12-02 14:17:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-02 14:17:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-12-02 14:17:11,502 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2020-12-02 14:17:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:17:11,502 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-12-02 14:17:11,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-12-02 14:17:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-12-02 14:17:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-02 14:17:11,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:17:11,503 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1] [2020-12-02 14:17:11,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:11,704 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:17:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:17:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1165315815, now seen corresponding path program 93 times [2020-12-02 14:17:11,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:17:11,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550301451] [2020-12-02 14:17:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:17:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:18,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550301451] [2020-12-02 14:17:18,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647444148] [2020-12-02 14:17:18,512 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:18,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2020-12-02 14:17:18,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:17:18,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-02 14:17:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:17:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:19,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:17:19,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2020-12-02 14:17:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863285580] [2020-12-02 14:17:19,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-02 14:17:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:17:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-02 14:17:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-12-02 14:17:19,104 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2020-12-02 14:17:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:17:19,742 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2020-12-02 14:17:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-02 14:17:19,743 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2020-12-02 14:17:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:17:19,744 INFO L225 Difference]: With dead ends: 200 [2020-12-02 14:17:19,744 INFO L226 Difference]: Without dead ends: 196 [2020-12-02 14:17:19,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-12-02 14:17:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-02 14:17:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-02 14:17:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-02 14:17:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-12-02 14:17:19,748 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2020-12-02 14:17:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:17:19,748 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-12-02 14:17:19,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-02 14:17:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-12-02 14:17:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-02 14:17:19,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:17:19,750 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2020-12-02 14:17:19,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:19,951 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:17:19,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:17:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 94 times [2020-12-02 14:17:19,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:17:19,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652143917] [2020-12-02 14:17:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:17:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:26,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652143917] [2020-12-02 14:17:26,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007983057] [2020-12-02 14:17:26,870 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:27,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-02 14:17:27,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:17:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 96 conjunts are in the unsatisfiable core [2020-12-02 14:17:27,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:17:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:27,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:17:27,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2020-12-02 14:17:27,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191218136] [2020-12-02 14:17:27,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-12-02 14:17:27,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:17:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-12-02 14:17:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-12-02 14:17:27,333 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2020-12-02 14:17:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:17:27,878 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2020-12-02 14:17:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-12-02 14:17:27,879 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2020-12-02 14:17:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:17:27,880 INFO L225 Difference]: With dead ends: 202 [2020-12-02 14:17:27,880 INFO L226 Difference]: Without dead ends: 198 [2020-12-02 14:17:27,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2020-12-02 14:17:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-02 14:17:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2020-12-02 14:17:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-02 14:17:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-12-02 14:17:27,885 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2020-12-02 14:17:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:17:27,885 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-12-02 14:17:27,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-12-02 14:17:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-12-02 14:17:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-02 14:17:27,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:17:27,887 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1] [2020-12-02 14:17:28,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:28,102 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:17:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:17:28,102 INFO L82 PathProgramCache]: Analyzing trace with hash -953655189, now seen corresponding path program 95 times [2020-12-02 14:17:28,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:17:28,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15509279] [2020-12-02 14:17:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:17:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:35,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15509279] [2020-12-02 14:17:35,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725633425] [2020-12-02 14:17:35,264 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:35,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2020-12-02 14:17:35,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:17:35,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-02 14:17:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:17:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:35,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:17:35,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2020-12-02 14:17:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59422254] [2020-12-02 14:17:35,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-12-02 14:17:35,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:17:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-12-02 14:17:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-12-02 14:17:35,891 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2020-12-02 14:17:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:17:36,402 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2020-12-02 14:17:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-02 14:17:36,403 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2020-12-02 14:17:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:17:36,404 INFO L225 Difference]: With dead ends: 204 [2020-12-02 14:17:36,404 INFO L226 Difference]: Without dead ends: 200 [2020-12-02 14:17:36,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2020-12-02 14:17:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-02 14:17:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-12-02 14:17:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-02 14:17:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2020-12-02 14:17:36,408 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2020-12-02 14:17:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:17:36,411 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2020-12-02 14:17:36,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-12-02 14:17:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2020-12-02 14:17:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-02 14:17:36,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:17:36,413 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1] [2020-12-02 14:17:36,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:36,624 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:17:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:17:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1581370259, now seen corresponding path program 96 times [2020-12-02 14:17:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:17:36,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775535454] [2020-12-02 14:17:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:17:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:43,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775535454] [2020-12-02 14:17:43,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830445439] [2020-12-02 14:17:43,934 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:44,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2020-12-02 14:17:44,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:17:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-02 14:17:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:17:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:44,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:17:44,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2020-12-02 14:17:44,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702544264] [2020-12-02 14:17:44,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-12-02 14:17:44,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:17:44,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-12-02 14:17:44,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-12-02 14:17:44,562 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2020-12-02 14:17:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:17:45,092 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-12-02 14:17:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-12-02 14:17:45,093 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2020-12-02 14:17:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:17:45,094 INFO L225 Difference]: With dead ends: 206 [2020-12-02 14:17:45,095 INFO L226 Difference]: Without dead ends: 202 [2020-12-02 14:17:45,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2020-12-02 14:17:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-02 14:17:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-12-02 14:17:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-02 14:17:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2020-12-02 14:17:45,098 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2020-12-02 14:17:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:17:45,098 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2020-12-02 14:17:45,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-12-02 14:17:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2020-12-02 14:17:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-02 14:17:45,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:17:45,099 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1] [2020-12-02 14:17:45,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-12-02 14:17:45,302 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:17:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:17:45,303 INFO L82 PathProgramCache]: Analyzing trace with hash 774836207, now seen corresponding path program 97 times [2020-12-02 14:17:45,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:17:45,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374708054] [2020-12-02 14:17:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:17:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374708054] [2020-12-02 14:17:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876320657] [2020-12-02 14:17:52,989 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:17:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-02 14:17:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:17:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:17:53,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:17:53,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2020-12-02 14:17:53,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011045399] [2020-12-02 14:17:53,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-12-02 14:17:53,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:17:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-12-02 14:17:53,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-12-02 14:17:53,490 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2020-12-02 14:17:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:17:54,114 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2020-12-02 14:17:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-02 14:17:54,115 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2020-12-02 14:17:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:17:54,116 INFO L225 Difference]: With dead ends: 208 [2020-12-02 14:17:54,116 INFO L226 Difference]: Without dead ends: 204 [2020-12-02 14:17:54,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2020-12-02 14:17:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-02 14:17:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2020-12-02 14:17:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-02 14:17:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-12-02 14:17:54,120 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2020-12-02 14:17:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:17:54,120 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-12-02 14:17:54,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-12-02 14:17:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-12-02 14:17:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-02 14:17:54,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:17:54,121 INFO L422 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1] [2020-12-02 14:17:54,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:17:54,322 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:17:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:17:54,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1641485041, now seen corresponding path program 98 times [2020-12-02 14:17:54,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:17:54,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138998630] [2020-12-02 14:17:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:17:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:18:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:02,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138998630] [2020-12-02 14:18:02,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878043846] [2020-12-02 14:18:02,167 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:18:02,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:18:02,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:18:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-02 14:18:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:18:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:02,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:18:02,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2020-12-02 14:18:02,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587891957] [2020-12-02 14:18:02,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-12-02 14:18:02,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:18:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-12-02 14:18:02,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-12-02 14:18:02,674 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2020-12-02 14:18:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:18:03,329 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2020-12-02 14:18:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-12-02 14:18:03,329 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2020-12-02 14:18:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:18:03,330 INFO L225 Difference]: With dead ends: 210 [2020-12-02 14:18:03,330 INFO L226 Difference]: Without dead ends: 206 [2020-12-02 14:18:03,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2020-12-02 14:18:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-02 14:18:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2020-12-02 14:18:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-02 14:18:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2020-12-02 14:18:03,334 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2020-12-02 14:18:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:18:03,334 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2020-12-02 14:18:03,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-12-02 14:18:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2020-12-02 14:18:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-02 14:18:03,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:18:03,335 INFO L422 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1] [2020-12-02 14:18:03,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:18:03,536 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:18:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:18:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1267359091, now seen corresponding path program 99 times [2020-12-02 14:18:03,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:18:03,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099380900] [2020-12-02 14:18:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:18:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:18:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:11,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099380900] [2020-12-02 14:18:11,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198712233] [2020-12-02 14:18:11,611 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:18:11,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2020-12-02 14:18:11,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:18:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-02 14:18:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:18:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:12,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:18:12,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2020-12-02 14:18:12,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812770503] [2020-12-02 14:18:12,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-12-02 14:18:12,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:18:12,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-12-02 14:18:12,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-12-02 14:18:12,289 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2020-12-02 14:18:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:18:12,915 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-12-02 14:18:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-12-02 14:18:12,916 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2020-12-02 14:18:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:18:12,917 INFO L225 Difference]: With dead ends: 211 [2020-12-02 14:18:12,918 INFO L226 Difference]: Without dead ends: 207 [2020-12-02 14:18:12,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-12-02 14:18:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-02 14:18:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-12-02 14:18:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-02 14:18:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-12-02 14:18:12,923 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2020-12-02 14:18:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:18:12,924 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-12-02 14:18:12,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-12-02 14:18:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-12-02 14:18:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-02 14:18:12,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:18:12,925 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1] [2020-12-02 14:18:13,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-02 14:18:13,140 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:18:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:18:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1785393291, now seen corresponding path program 100 times [2020-12-02 14:18:13,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:18:13,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971239048] [2020-12-02 14:18:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:18:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:18:13,191 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:18:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:18:13,320 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:18:13,388 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 14:18:13,389 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 14:18:13,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-12-02 14:18:13,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:18:13 BoogieIcfgContainer [2020-12-02 14:18:13,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:18:13,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:18:13,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:18:13,583 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:18:13,584 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:12:47" (3/4) ... [2020-12-02 14:18:13,588 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 14:18:13,588 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:18:13,591 INFO L168 Benchmark]: Toolchain (without parser) took 326493.02 ms. Allocated memory was 52.4 MB in the beginning and 283.1 MB in the end (delta: 230.7 MB). Free memory was 29.3 MB in the beginning and 182.8 MB in the end (delta: -153.5 MB). Peak memory consumption was 79.7 MB. Max. memory is 16.1 GB. [2020-12-02 14:18:13,591 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 52.4 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:18:13,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.62 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 34.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:18:13,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.75 ms. Allocated memory is still 52.4 MB. Free memory was 34.7 MB in the beginning and 33.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:18:13,593 INFO L168 Benchmark]: Boogie Preprocessor took 26.46 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 32.4 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:18:13,593 INFO L168 Benchmark]: RCFGBuilder took 486.13 ms. Allocated memory is still 52.4 MB. Free memory was 32.2 MB in the beginning and 34.8 MB in the end (delta: -2.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-12-02 14:18:13,593 INFO L168 Benchmark]: TraceAbstraction took 325610.86 ms. Allocated memory was 52.4 MB in the beginning and 283.1 MB in the end (delta: 230.7 MB). Free memory was 34.4 MB in the beginning and 183.9 MB in the end (delta: -149.5 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. [2020-12-02 14:18:13,594 INFO L168 Benchmark]: Witness Printer took 5.82 ms. Allocated memory is still 283.1 MB. Free memory was 183.9 MB in the beginning and 182.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:18:13,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 52.4 MB. Free memory is still 34.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.62 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 34.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.75 ms. Allocated memory is still 52.4 MB. Free memory was 34.7 MB in the beginning and 33.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.46 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 32.4 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 486.13 ms. Allocated memory is still 52.4 MB. Free memory was 32.2 MB in the beginning and 34.8 MB in the end (delta: -2.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 325610.86 ms. Allocated memory was 52.4 MB in the beginning and 283.1 MB in the end (delta: 230.7 MB). Free memory was 34.4 MB in the beginning and 183.9 MB in the end (delta: -149.5 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.82 ms. Allocated memory is still 283.1 MB. Free memory was 183.9 MB in the beginning and 182.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticDOUBLE_SMToperation at line 22, overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 27. Possible FailurePath: [L16] double x0, x1, x2; [L17] int i; [L19] x0 = 11. / 2. [L20] x1 = 61. / 11. [L21] i = 0 [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND FALSE !(i < 100) [L12] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 325.3s, OverallIterations: 101, TraceHistogramMax: 100, AutomataDifference: 24.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 604 SDtfs, 5050 SDslu, 14680 SDs, 0 SdLazy, 14038 SolverSat, 148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15645 GetRequests, 10496 SyntacticMatches, 0 SemanticMatches, 5149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9702 ImplicationChecksByTransitivity, 240.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 100 MinimizatonAttempts, 99 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.0s SsaConstructionTime, 10.5s SatisfiabilityAnalysisTime, 260.9s InterpolantComputationTime, 21200 NumberOfCodeBlocks, 21200 NumberOfCodeBlocksAsserted, 2716 NumberOfCheckSat, 20795 ConstructedInterpolants, 0 QuantifiedInterpolants, 8322965 SizeOfPredicates, 0 NumberOfNonLiveVariables, 38709 ConjunctsInSsa, 5148 ConjunctsInUnsatCore, 199 InterpolantComputations, 1 PerfectInterpolantSequences, 0/656700 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-2880296 [2020-12-02 14:18:16,352 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-12-02 14:18:16,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:18:16,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:18:16,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:18:16,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:18:16,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:18:16,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:18:16,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:18:16,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:18:16,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:18:16,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:18:16,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:18:16,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:18:16,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:18:16,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:18:16,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:18:16,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:18:16,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:18:16,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:18:16,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:18:16,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:18:16,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:18:16,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:18:16,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:18:16,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:18:16,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:18:16,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:18:16,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:18:16,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:18:16,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:18:16,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 14:18:16,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:18:16,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:18:16,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:18:16,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:18:16,537 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:18:16,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:18:16,537 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:18:16,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:18:16,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:18:16,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:18:16,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:18:16,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:18:16,539 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 14:18:16,540 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 14:18:16,540 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:18:16,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:18:16,541 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:18:16,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:18:16,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:18:16,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:18:16,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:18:16,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:18:16,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:18:16,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:18:16,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:18:16,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:18:16,544 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 14:18:16,544 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 14:18:16,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:18:16,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:18:16,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 14:18:16,546 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34d9ef61eabdd9c5759553acd1add875b11b0827 [2020-12-02 14:18:16,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:18:17,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:18:17,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:18:17,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:18:17,009 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:18:17,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-12-02 14:18:17,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b062fee/a729e35e2f224f1eafa5c5fb1338cbd4/FLAGc2c57e2ad [2020-12-02 14:18:17,734 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:18:17,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-12-02 14:18:17,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b062fee/a729e35e2f224f1eafa5c5fb1338cbd4/FLAGc2c57e2ad [2020-12-02 14:18:18,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39b062fee/a729e35e2f224f1eafa5c5fb1338cbd4 [2020-12-02 14:18:18,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:18:18,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:18:18,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:18:18,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:18:18,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:18:18,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15094880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18, skipping insertion in model container [2020-12-02 14:18:18,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,161 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:18:18,181 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:18:18,403 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c[631,644] [2020-12-02 14:18:18,425 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:18:18,443 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:18:18,458 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c[631,644] [2020-12-02 14:18:18,466 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:18:18,486 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:18:18,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18 WrapperNode [2020-12-02 14:18:18,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:18:18,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:18:18,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:18:18,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:18:18,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:18:18,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:18:18,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:18:18,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:18:18,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (1/1) ... [2020-12-02 14:18:18,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:18:18,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:18:18,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:18:18,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:18:18,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (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 [2020-12-02 14:18:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-02 14:18:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 14:18:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:18:18,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:18:18,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:18:21,501 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:18:21,501 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-02 14:18:21,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:18:21 BoogieIcfgContainer [2020-12-02 14:18:21,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:18:21,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:18:21,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:18:21,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:18:21,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:18:18" (1/3) ... [2020-12-02 14:18:21,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7907c8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:18:21, skipping insertion in model container [2020-12-02 14:18:21,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:18:18" (2/3) ... [2020-12-02 14:18:21,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7907c8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:18:21, skipping insertion in model container [2020-12-02 14:18:21,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:18:21" (3/3) ... [2020-12-02 14:18:21,515 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-12-02 14:18:21,532 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:18:21,537 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:18:21,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:18:21,579 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:18:21,580 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:18:21,581 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:18:21,581 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:18:21,581 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:18:21,581 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:18:21,581 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:18:21,582 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:18:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-02 14:18:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-02 14:18:21,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:18:21,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:18:21,603 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:18:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:18:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 211951409, now seen corresponding path program 1 times [2020-12-02 14:18:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:18:21,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121686218] [2020-12-02 14:18:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-02 14:18:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:18:23,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-02 14:18:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:18:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:23,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 14:18:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:23,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121686218] [2020-12-02 14:18:23,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:18:23,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-02 14:18:23,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910528765] [2020-12-02 14:18:23,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 14:18:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 14:18:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 14:18:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 14:18:23,894 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-12-02 14:18:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:18:27,640 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-12-02 14:18:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-02 14:18:27,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-02 14:18:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:18:27,654 INFO L225 Difference]: With dead ends: 25 [2020-12-02 14:18:27,655 INFO L226 Difference]: Without dead ends: 11 [2020-12-02 14:18:27,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 14:18:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-02 14:18:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-02 14:18:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-02 14:18:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-02 14:18:27,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-12-02 14:18:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:18:27,698 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-02 14:18:27,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 14:18:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-02 14:18:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 14:18:27,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:18:27,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:18:27,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 14:18:27,905 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:18:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:18:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1435849267, now seen corresponding path program 1 times [2020-12-02 14:18:27,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:18:27,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855709092] [2020-12-02 14:18:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-02 14:18:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:18:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-02 14:18:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:18:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:31,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 14:18:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:18:31,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855709092] [2020-12-02 14:18:31,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-02 14:18:31,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-02 14:18:31,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895523688] [2020-12-02 14:18:31,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 14:18:31,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 14:18:31,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 14:18:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-02 14:18:31,836 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2020-12-02 14:18:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:18:39,403 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-02 14:18:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 14:18:39,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-02 14:18:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:18:39,405 INFO L225 Difference]: With dead ends: 21 [2020-12-02 14:18:39,405 INFO L226 Difference]: Without dead ends: 15 [2020-12-02 14:18:39,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-02 14:18:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-02 14:18:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-02 14:18:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-02 14:18:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-02 14:18:39,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-02 14:18:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:18:39,414 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-02 14:18:39,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 14:18:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-02 14:18:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 14:18:39,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:18:39,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:18:39,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 14:18:39,618 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:18:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:18:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1798984009, now seen corresponding path program 2 times [2020-12-02 14:18:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:18:39,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056030991] [2020-12-02 14:18:39,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-02 14:18:46,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:18:46,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:18:47,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-02 14:18:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:18:49,824 WARN L838 $PredicateComparison]: unable to prove that (and (= roundNearestTiesToEven c_~CRM) (exists ((|v_ULTIMATE.start_main_#t~nondet8_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet7_8| (_ BitVec 64))) (let ((.cse1 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet8_8|))) (.cse0 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet7_8|)))) (and (= (fp.div c_~CRM .cse0 .cse1) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x0~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x0~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x0~0))) (= ((_ to_fp 11 53) c_~CRM 2.0) .cse1) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse0)))) (exists ((|v_ULTIMATE.start_main_#t~nondet10_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet11_8| (_ BitVec 64))) (let ((.cse2 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet10_8|))) (.cse3 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet11_8|)))) (and (= .cse2 ((_ to_fp 11 53) c_~CRM 61.0)) (= (fp.div c_~CRM .cse2 .cse3) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x1~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x1~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x1~0))) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse3))))) is different from false [2020-12-02 14:18:53,629 WARN L838 $PredicateComparison]: unable to prove that (and (= roundNearestTiesToEven c_~CRM) (exists ((v_ULTIMATE.start_main_~x0~0_13 (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet16_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet17_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet18_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet8_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet19_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet7_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet14_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet15_8| (_ BitVec 64))) (let ((.cse1 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet16_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet16_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet16_8|))) (.cse5 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet18_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet18_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet18_8|))) (.cse8 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet15_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet15_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet15_8|))) (.cse0 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet17_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet17_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet17_8|))) (.cse3 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet14_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet14_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet14_8|))) (.cse4 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet19_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet19_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet19_8|))) (.cse7 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet7_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet7_8|))) (.cse6 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet8_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet8_8|))) (.cse2 (fp ((_ extract 63 63) v_ULTIMATE.start_main_~x0~0_13) ((_ extract 62 52) v_ULTIMATE.start_main_~x0~0_13) ((_ extract 51 0) v_ULTIMATE.start_main_~x0~0_13)))) (and (= .cse0 (fp.div c_~CRM .cse1 .cse2)) (= ((_ to_fp 11 53) c_~CRM 111.0) .cse3) (= .cse4 (fp.div c_~CRM .cse5 (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x0~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x0~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x0~0)))) (= ((_ to_fp 11 53) c_~CRM 3000.0) .cse1) (= ((_ to_fp 11 53) c_~CRM 2.0) .cse6) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse7) (= ((_ to_fp 11 53) c_~CRM 1130.0) .cse8) (= .cse5 (fp.sub c_~CRM .cse8 .cse0)) (= (fp.sub c_~CRM .cse3 .cse4) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x1~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x1~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x1~0))) (= (fp.div c_~CRM .cse7 .cse6) .cse2)))) (exists ((|v_ULTIMATE.start_main_#t~nondet10_8| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~nondet11_8| (_ BitVec 64))) (let ((.cse9 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet10_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet10_8|))) (.cse10 (fp ((_ extract 63 63) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 62 52) |v_ULTIMATE.start_main_#t~nondet11_8|) ((_ extract 51 0) |v_ULTIMATE.start_main_#t~nondet11_8|)))) (and (= (fp.div c_~CRM .cse9 .cse10) (fp ((_ extract 63 63) c_ULTIMATE.start_main_~x0~0) ((_ extract 62 52) c_ULTIMATE.start_main_~x0~0) ((_ extract 51 0) c_ULTIMATE.start_main_~x0~0))) (= .cse9 ((_ to_fp 11 53) c_~CRM 61.0)) (= ((_ to_fp 11 53) c_~CRM 11.0) .cse10))))) is different from false [2020-12-02 14:18:58,239 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-02 14:18:58,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056030991] [2020-12-02 14:18:58,242 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-12-02 14:18:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [902893359] [2020-12-02 14:18:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-12-02 14:18:58,263 WARN L195 Executor]: External (cvc4 --incremental --print-success --lang smt --rewrite-divk) stderr output: (error "Error in option parsing: can't understand option `--rewrite-divk'") Please use --help to get help on command-line options. [2020-12-02 14:18:58,264 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (cvc4 --incremental --print-success --lang smt --rewrite-divk)Received EOF on stdin. stderr output: (error "Error in option parsing: can't understand option `--rewrite-divk'") Please use --help to get help on command-line options. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:222) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.createProcess(Executor.java:108) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.(Executor.java:83) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.(Scriptor.java:72) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.solverbuilder.SolverBuilder.buildScript(SolverBuilder.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.solverbuilder.SolverBuilder.buildAndInitializeSolver(SolverBuilder.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCvc4.constructManagedScript(IpTcStrategyModuleCvc4.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:206) ... 34 more [2020-12-02 14:18:58,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441921692] [2020-12-02 14:18:58,268 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 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 [2020-12-02 14:19:30,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-02 14:19:30,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-02 14:19:31,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-02 14:19:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:19:31,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken [2020-12-02 14:19:31,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:19:31,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-02 14:19:31,220 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-12-02 14:19:31,220 INFO L523 BasicCegarLoop]: Counterexample might be feasible [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2020-12-02 14:19:31,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-02 14:19:31,674 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-02 14:19:31,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:19:31 BoogieIcfgContainer [2020-12-02 14:19:31,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:19:31,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:19:31,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:19:31,693 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:19:31,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:18:21" (3/4) ... [2020-12-02 14:19:31,698 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 14:19:31,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:19:31,703 INFO L168 Benchmark]: Toolchain (without parser) took 73568.32 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.6 MB in the beginning and 38.2 MB in the end (delta: -13.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:19:31,704 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 48.2 MB. Free memory was 27.9 MB in the beginning and 27.9 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:19:31,707 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.26 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 35.7 MB in the end (delta: -11.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-02 14:19:31,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.01 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 34.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:19:31,711 INFO L168 Benchmark]: Boogie Preprocessor took 35.86 ms. Allocated memory is still 58.7 MB. Free memory was 34.1 MB in the beginning and 32.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:19:31,718 INFO L168 Benchmark]: RCFGBuilder took 2929.27 ms. Allocated memory is still 58.7 MB. Free memory was 32.7 MB in the beginning and 33.2 MB in the end (delta: -474.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:19:31,719 INFO L168 Benchmark]: TraceAbstraction took 70182.29 ms. Allocated memory is still 58.7 MB. Free memory was 32.7 MB in the beginning and 38.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-02 14:19:31,720 INFO L168 Benchmark]: Witness Printer took 9.56 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 38.2 MB in the end (delta: 350.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:19:31,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 48.2 MB. Free memory was 27.9 MB in the beginning and 27.9 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 351.26 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 35.7 MB in the end (delta: -11.3 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.01 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 34.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.86 ms. Allocated memory is still 58.7 MB. Free memory was 34.1 MB in the beginning and 32.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2929.27 ms. Allocated memory is still 58.7 MB. Free memory was 32.7 MB in the beginning and 33.2 MB in the end (delta: -474.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 70182.29 ms. Allocated memory is still 58.7 MB. Free memory was 32.7 MB in the beginning and 38.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * Witness Printer took 9.56 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 38.2 MB in the end (delta: 350.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] double x0, x1, x2; [L17] int i; [L19] EXPR 11. [L19] EXPR 2. [L19] EXPR 11. / 2. [L19] x0 = 11. / 2. [L20] EXPR 61. [L20] EXPR 11. [L20] EXPR 61. / 11. [L20] x1 = 61. / 11. [L21] i = 0 [L21] COND TRUE i < 100 [L22] EXPR 111. [L22] EXPR 1130. [L22] EXPR 3000. [L22] EXPR 3000. / x0 [L22] EXPR 1130. - 3000. / x0 [L22] EXPR (1130. - 3000. / x0) / x1 [L22] EXPR 111. - (1130. - 3000. / x0) / x1 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] EXPR 111. [L22] EXPR 1130. [L22] EXPR 3000. [L22] EXPR 3000. / x0 [L22] EXPR 1130. - 3000. / x0 [L22] EXPR (1130. - 3000. / x0) / x1 [L22] EXPR 111. - (1130. - 3000. / x0) / x1 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND TRUE i < 100 [L22] EXPR 111. [L22] EXPR 1130. [L22] EXPR 3000. [L22] EXPR 3000. / x0 [L22] EXPR 1130. - 3000. / x0 [L22] EXPR (1130. - 3000. / x0) / x1 [L22] EXPR 111. - (1130. - 3000. / x0) / x1 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ [L21] COND FALSE !(i < 100) [L27] EXPR 99. [L27] x0 >= 99. && x0 <= 101. [L27] EXPR 101. [L27] x0 >= 99. && x0 <= 101. [L12] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 70.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 11.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 0 SDslu, 36 SDs, 0 SdLazy, 11 SolverSat, 2 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 10.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 432 SizeOfPredicates, 2 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...