./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/byte_add_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a92d749021b3b94f4ecd59f60bbcb6b80102c08a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/byte_add_1-1.i -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 a92d749021b3b94f4ecd59f60bbcb6b80102c08a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:19:31,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:19:31,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:19:31,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:19:31,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:19:31,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:19:31,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:19:31,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:19:31,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:19:31,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:19:31,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:19:31,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:19:31,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:19:31,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:19:31,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:19:31,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:19:31,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:19:31,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:19:31,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:19:31,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:19:31,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:19:31,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:19:31,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:19:31,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:19:31,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:19:31,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:19:31,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:19:31,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:19:31,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:19:31,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:19:31,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:19:31,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:19:31,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:19:31,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:19:31,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:19:31,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:19:31,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:19:31,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:19:31,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:19:31,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:19:31,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:19:31,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:19:31,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:19:31,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:19:31,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:19:31,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:19:31,776 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:19:31,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:19:31,776 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:19:31,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:19:31,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:19:31,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:19:31,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:19:31,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:19:31,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:19:31,779 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:19:31,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:19:31,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:19:31,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:19:31,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:19:31,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:19:31,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:19:31,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:19:31,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:19:31,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:19:31,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:19:31,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:19:31,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:19:31,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:19:31,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:19:31,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:19:31,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92d749021b3b94f4ecd59f60bbcb6b80102c08a [2020-10-19 22:19:32,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:19:32,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:19:32,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:19:32,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:19:32,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:19:32,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add_1-1.i [2020-10-19 22:19:32,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b82b6886a/942419822dc94cbbb518ca5367dc22d4/FLAGf2f6da676 [2020-10-19 22:19:32,541 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:19:32,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_1-1.i [2020-10-19 22:19:32,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b82b6886a/942419822dc94cbbb518ca5367dc22d4/FLAGf2f6da676 [2020-10-19 22:19:32,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b82b6886a/942419822dc94cbbb518ca5367dc22d4 [2020-10-19 22:19:32,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:19:32,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:19:32,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:19:32,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:19:32,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:19:32,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:19:32" (1/1) ... [2020-10-19 22:19:32,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395e047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:32, skipping insertion in model container [2020-10-19 22:19:32,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:19:32" (1/1) ... [2020-10-19 22:19:32,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:19:32,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:19:33,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:19:33,348 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:19:33,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:19:33,420 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:19:33,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33 WrapperNode [2020-10-19 22:19:33,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:19:33,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:19:33,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:19:33,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:19:33,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:19:33,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:19:33,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:19:33,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:19:33,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... [2020-10-19 22:19:33,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:19:33,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:19:33,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:19:33,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:19:33,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:19:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:19:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:19:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:19:33,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:19:33,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:19:33,919 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:19:33,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:33 BoogieIcfgContainer [2020-10-19 22:19:33,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:19:33,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:19:33,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:19:33,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:19:33,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:19:32" (1/3) ... [2020-10-19 22:19:33,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657dd9ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:19:33, skipping insertion in model container [2020-10-19 22:19:33,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:33" (2/3) ... [2020-10-19 22:19:33,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657dd9ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:19:33, skipping insertion in model container [2020-10-19 22:19:33,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:33" (3/3) ... [2020-10-19 22:19:33,932 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2020-10-19 22:19:33,946 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:19:33,954 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:19:33,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:19:34,000 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:19:34,000 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:19:34,000 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:19:34,000 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:19:34,001 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:19:34,001 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:19:34,001 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:19:34,002 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:19:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-19 22:19:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:19:34,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:34,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:34,029 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash 300651760, now seen corresponding path program 1 times [2020-10-19 22:19:34,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:34,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194944056] [2020-10-19 22:19:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:34,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194944056] [2020-10-19 22:19:34,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:34,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:19:34,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189146997] [2020-10-19 22:19:34,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:19:34,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:19:34,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:19:34,262 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2020-10-19 22:19:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:34,281 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2020-10-19 22:19:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:19:34,282 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-19 22:19:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:34,295 INFO L225 Difference]: With dead ends: 62 [2020-10-19 22:19:34,295 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 22:19:34,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:19:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 22:19:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-19 22:19:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 22:19:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-10-19 22:19:34,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 14 [2020-10-19 22:19:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:34,342 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-10-19 22:19:34,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:19:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-10-19 22:19:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:19:34,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:34,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:34,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:19:34,345 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2025375790, now seen corresponding path program 1 times [2020-10-19 22:19:34,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:34,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218671095] [2020-10-19 22:19:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:34,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218671095] [2020-10-19 22:19:34,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:34,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:19:34,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142434285] [2020-10-19 22:19:34,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:19:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:34,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:19:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:19:34,481 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 3 states. [2020-10-19 22:19:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:34,695 INFO L93 Difference]: Finished difference Result 93 states and 160 transitions. [2020-10-19 22:19:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:19:34,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-19 22:19:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:34,697 INFO L225 Difference]: With dead ends: 93 [2020-10-19 22:19:34,698 INFO L226 Difference]: Without dead ends: 63 [2020-10-19 22:19:34,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:19:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-19 22:19:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-19 22:19:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-19 22:19:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 91 transitions. [2020-10-19 22:19:34,710 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 91 transitions. Word has length 14 [2020-10-19 22:19:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:34,710 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 91 transitions. [2020-10-19 22:19:34,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:19:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 91 transitions. [2020-10-19 22:19:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:19:34,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:34,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:34,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:19:34,720 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash -331305593, now seen corresponding path program 1 times [2020-10-19 22:19:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:34,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696682361] [2020-10-19 22:19:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:19:34,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696682361] [2020-10-19 22:19:34,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:34,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:19:34,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743370501] [2020-10-19 22:19:34,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:34,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:34,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:19:34,834 INFO L87 Difference]: Start difference. First operand 61 states and 91 transitions. Second operand 4 states. [2020-10-19 22:19:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:35,092 INFO L93 Difference]: Finished difference Result 158 states and 237 transitions. [2020-10-19 22:19:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:35,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 22:19:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:35,094 INFO L225 Difference]: With dead ends: 158 [2020-10-19 22:19:35,095 INFO L226 Difference]: Without dead ends: 113 [2020-10-19 22:19:35,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-19 22:19:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 68. [2020-10-19 22:19:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-19 22:19:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 101 transitions. [2020-10-19 22:19:35,106 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 101 transitions. Word has length 20 [2020-10-19 22:19:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:35,107 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 101 transitions. [2020-10-19 22:19:35,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 101 transitions. [2020-10-19 22:19:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:19:35,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:35,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:35,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:19:35,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1354407497, now seen corresponding path program 1 times [2020-10-19 22:19:35,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:35,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149155345] [2020-10-19 22:19:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:19:35,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149155345] [2020-10-19 22:19:35,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:35,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:19:35,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323295087] [2020-10-19 22:19:35,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:19:35,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:19:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:19:35,263 INFO L87 Difference]: Start difference. First operand 68 states and 101 transitions. Second operand 3 states. [2020-10-19 22:19:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:35,271 INFO L93 Difference]: Finished difference Result 112 states and 167 transitions. [2020-10-19 22:19:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:19:35,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-19 22:19:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:35,274 INFO L225 Difference]: With dead ends: 112 [2020-10-19 22:19:35,274 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 22:19:35,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:19:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 22:19:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-19 22:19:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 22:19:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 79 transitions. [2020-10-19 22:19:35,282 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 79 transitions. Word has length 21 [2020-10-19 22:19:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:35,282 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 79 transitions. [2020-10-19 22:19:35,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:19:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 79 transitions. [2020-10-19 22:19:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 22:19:35,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:35,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:35,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 22:19:35,285 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1776419085, now seen corresponding path program 1 times [2020-10-19 22:19:35,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:35,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448115777] [2020-10-19 22:19:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:35,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448115777] [2020-10-19 22:19:35,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:35,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:19:35,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669908002] [2020-10-19 22:19:35,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:19:35,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:19:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:19:35,363 INFO L87 Difference]: Start difference. First operand 54 states and 79 transitions. Second operand 3 states. [2020-10-19 22:19:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:35,377 INFO L93 Difference]: Finished difference Result 77 states and 111 transitions. [2020-10-19 22:19:35,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:19:35,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-19 22:19:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:35,380 INFO L225 Difference]: With dead ends: 77 [2020-10-19 22:19:35,380 INFO L226 Difference]: Without dead ends: 64 [2020-10-19 22:19:35,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:19:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-19 22:19:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-19 22:19:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-19 22:19:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2020-10-19 22:19:35,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 27 [2020-10-19 22:19:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:35,389 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2020-10-19 22:19:35,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:19:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2020-10-19 22:19:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 22:19:35,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:35,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:35,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 22:19:35,392 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash 765301835, now seen corresponding path program 1 times [2020-10-19 22:19:35,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:35,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626613621] [2020-10-19 22:19:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:35,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626613621] [2020-10-19 22:19:35,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:35,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:19:35,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738627412] [2020-10-19 22:19:35,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:35,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:35,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:35,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:19:35,525 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand 4 states. [2020-10-19 22:19:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:35,772 INFO L93 Difference]: Finished difference Result 168 states and 248 transitions. [2020-10-19 22:19:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:35,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 22:19:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:35,774 INFO L225 Difference]: With dead ends: 168 [2020-10-19 22:19:35,774 INFO L226 Difference]: Without dead ends: 123 [2020-10-19 22:19:35,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-19 22:19:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 72. [2020-10-19 22:19:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-19 22:19:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-10-19 22:19:35,783 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 27 [2020-10-19 22:19:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:35,784 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-10-19 22:19:35,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-10-19 22:19:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:19:35,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:35,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:35,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 22:19:35,787 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:35,787 INFO L82 PathProgramCache]: Analyzing trace with hash 368939738, now seen corresponding path program 1 times [2020-10-19 22:19:35,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:35,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528894705] [2020-10-19 22:19:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:35,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528894705] [2020-10-19 22:19:35,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939956187] [2020-10-19 22:19:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 22:19:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:36,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:19:36,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-10-19 22:19:36,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58988430] [2020-10-19 22:19:36,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:36,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:19:36,044 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 4 states. [2020-10-19 22:19:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:36,268 INFO L93 Difference]: Finished difference Result 160 states and 258 transitions. [2020-10-19 22:19:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:36,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 22:19:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:36,270 INFO L225 Difference]: With dead ends: 160 [2020-10-19 22:19:36,270 INFO L226 Difference]: Without dead ends: 124 [2020-10-19 22:19:36,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:19:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-19 22:19:36,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2020-10-19 22:19:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-19 22:19:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2020-10-19 22:19:36,280 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 28 [2020-10-19 22:19:36,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:36,281 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2020-10-19 22:19:36,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2020-10-19 22:19:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-19 22:19:36,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:36,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:36,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-19 22:19:36,498 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2119337931, now seen corresponding path program 1 times [2020-10-19 22:19:36,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:36,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247412385] [2020-10-19 22:19:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:36,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247412385] [2020-10-19 22:19:36,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532748826] [2020-10-19 22:19:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 22:19:36,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:19:36,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:19:36,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-10-19 22:19:36,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011194551] [2020-10-19 22:19:36,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:36,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:36,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:36,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 22:19:36,779 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand 4 states. [2020-10-19 22:19:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:36,989 INFO L93 Difference]: Finished difference Result 247 states and 355 transitions. [2020-10-19 22:19:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:36,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-19 22:19:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:36,991 INFO L225 Difference]: With dead ends: 247 [2020-10-19 22:19:36,991 INFO L226 Difference]: Without dead ends: 162 [2020-10-19 22:19:36,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 22:19:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-19 22:19:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 133. [2020-10-19 22:19:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-19 22:19:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 170 transitions. [2020-10-19 22:19:37,000 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 170 transitions. Word has length 34 [2020-10-19 22:19:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:37,001 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 170 transitions. [2020-10-19 22:19:37,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 170 transitions. [2020-10-19 22:19:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-19 22:19:37,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:37,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:37,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:37,219 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash -703281344, now seen corresponding path program 1 times [2020-10-19 22:19:37,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:37,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060716521] [2020-10-19 22:19:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 22:19:37,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060716521] [2020-10-19 22:19:37,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246577406] [2020-10-19 22:19:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:37,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 22:19:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 22:19:37,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:19:37,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-10-19 22:19:37,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023797004] [2020-10-19 22:19:37,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:37,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:37,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 22:19:37,482 INFO L87 Difference]: Start difference. First operand 133 states and 170 transitions. Second operand 4 states. [2020-10-19 22:19:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:37,720 INFO L93 Difference]: Finished difference Result 306 states and 420 transitions. [2020-10-19 22:19:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:37,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-19 22:19:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:37,727 INFO L225 Difference]: With dead ends: 306 [2020-10-19 22:19:37,727 INFO L226 Difference]: Without dead ends: 192 [2020-10-19 22:19:37,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 22:19:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-19 22:19:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2020-10-19 22:19:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-19 22:19:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2020-10-19 22:19:37,742 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 40 [2020-10-19 22:19:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:37,743 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2020-10-19 22:19:37,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2020-10-19 22:19:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-19 22:19:37,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:37,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:37,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:37,948 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1781456689, now seen corresponding path program 1 times [2020-10-19 22:19:37,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:37,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937620445] [2020-10-19 22:19:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-19 22:19:38,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937620445] [2020-10-19 22:19:38,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253186665] [2020-10-19 22:19:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:38,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 22:19:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 22:19:38,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:19:38,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-10-19 22:19:38,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867947547] [2020-10-19 22:19:38,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:19:38,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:38,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:19:38,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:38,168 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand 5 states. [2020-10-19 22:19:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:38,341 INFO L93 Difference]: Finished difference Result 490 states and 636 transitions. [2020-10-19 22:19:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 22:19:38,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-19 22:19:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:38,344 INFO L225 Difference]: With dead ends: 490 [2020-10-19 22:19:38,344 INFO L226 Difference]: Without dead ends: 281 [2020-10-19 22:19:38,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-19 22:19:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-19 22:19:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 229. [2020-10-19 22:19:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-19 22:19:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 286 transitions. [2020-10-19 22:19:38,360 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 286 transitions. Word has length 46 [2020-10-19 22:19:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:38,361 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 286 transitions. [2020-10-19 22:19:38,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:19:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 286 transitions. [2020-10-19 22:19:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-19 22:19:38,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:38,363 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:38,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:38,577 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -228393871, now seen corresponding path program 1 times [2020-10-19 22:19:38,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:38,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429952706] [2020-10-19 22:19:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-19 22:19:38,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429952706] [2020-10-19 22:19:38,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:38,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 22:19:38,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148515553] [2020-10-19 22:19:38,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:19:38,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:19:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:38,687 INFO L87 Difference]: Start difference. First operand 229 states and 286 transitions. Second operand 5 states. [2020-10-19 22:19:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:39,055 INFO L93 Difference]: Finished difference Result 495 states and 612 transitions. [2020-10-19 22:19:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 22:19:39,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-19 22:19:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:39,057 INFO L225 Difference]: With dead ends: 495 [2020-10-19 22:19:39,058 INFO L226 Difference]: Without dead ends: 382 [2020-10-19 22:19:39,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-19 22:19:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 237. [2020-10-19 22:19:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-19 22:19:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 294 transitions. [2020-10-19 22:19:39,069 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 294 transitions. Word has length 67 [2020-10-19 22:19:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:39,069 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 294 transitions. [2020-10-19 22:19:39,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:19:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 294 transitions. [2020-10-19 22:19:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-19 22:19:39,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:39,071 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:39,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 22:19:39,071 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:39,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1082575529, now seen corresponding path program 1 times [2020-10-19 22:19:39,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:39,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699625439] [2020-10-19 22:19:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-19 22:19:39,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699625439] [2020-10-19 22:19:39,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:39,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 22:19:39,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697875291] [2020-10-19 22:19:39,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:19:39,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:39,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:19:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:39,250 INFO L87 Difference]: Start difference. First operand 237 states and 294 transitions. Second operand 5 states. [2020-10-19 22:19:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:39,386 INFO L93 Difference]: Finished difference Result 729 states and 907 transitions. [2020-10-19 22:19:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 22:19:39,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-19 22:19:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:39,390 INFO L225 Difference]: With dead ends: 729 [2020-10-19 22:19:39,390 INFO L226 Difference]: Without dead ends: 515 [2020-10-19 22:19:39,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:39,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-19 22:19:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 336. [2020-10-19 22:19:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-19 22:19:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 428 transitions. [2020-10-19 22:19:39,413 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 428 transitions. Word has length 68 [2020-10-19 22:19:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:39,414 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 428 transitions. [2020-10-19 22:19:39,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:19:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 428 transitions. [2020-10-19 22:19:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-19 22:19:39,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:39,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:39,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 22:19:39,416 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2077896939, now seen corresponding path program 1 times [2020-10-19 22:19:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:39,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579833716] [2020-10-19 22:19:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-19 22:19:39,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579833716] [2020-10-19 22:19:39,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:39,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 22:19:39,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892547536] [2020-10-19 22:19:39,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 22:19:39,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 22:19:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:19:39,538 INFO L87 Difference]: Start difference. First operand 336 states and 428 transitions. Second operand 6 states. [2020-10-19 22:19:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:40,128 INFO L93 Difference]: Finished difference Result 951 states and 1193 transitions. [2020-10-19 22:19:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 22:19:40,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-19 22:19:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:40,136 INFO L225 Difference]: With dead ends: 951 [2020-10-19 22:19:40,137 INFO L226 Difference]: Without dead ends: 766 [2020-10-19 22:19:40,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-19 22:19:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-10-19 22:19:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 336. [2020-10-19 22:19:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-19 22:19:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 428 transitions. [2020-10-19 22:19:40,161 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 428 transitions. Word has length 68 [2020-10-19 22:19:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:40,161 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 428 transitions. [2020-10-19 22:19:40,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 22:19:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 428 transitions. [2020-10-19 22:19:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-19 22:19:40,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:40,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:40,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 22:19:40,165 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1398624685, now seen corresponding path program 1 times [2020-10-19 22:19:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:40,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802249262] [2020-10-19 22:19:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-19 22:19:40,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802249262] [2020-10-19 22:19:40,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:40,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 22:19:40,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358570586] [2020-10-19 22:19:40,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 22:19:40,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:40,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 22:19:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:40,394 INFO L87 Difference]: Start difference. First operand 336 states and 428 transitions. Second operand 7 states. [2020-10-19 22:19:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:41,017 INFO L93 Difference]: Finished difference Result 970 states and 1213 transitions. [2020-10-19 22:19:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 22:19:41,017 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-19 22:19:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:41,021 INFO L225 Difference]: With dead ends: 970 [2020-10-19 22:19:41,021 INFO L226 Difference]: Without dead ends: 785 [2020-10-19 22:19:41,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-19 22:19:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-10-19 22:19:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 332. [2020-10-19 22:19:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-19 22:19:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 424 transitions. [2020-10-19 22:19:41,038 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 424 transitions. Word has length 68 [2020-10-19 22:19:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:41,038 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 424 transitions. [2020-10-19 22:19:41,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 22:19:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 424 transitions. [2020-10-19 22:19:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-19 22:19:41,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:41,039 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:41,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 22:19:41,040 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:41,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1037474941, now seen corresponding path program 1 times [2020-10-19 22:19:41,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:41,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467696412] [2020-10-19 22:19:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-19 22:19:41,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467696412] [2020-10-19 22:19:41,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75463938] [2020-10-19 22:19:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 22:19:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-19 22:19:41,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:19:41,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-10-19 22:19:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591551625] [2020-10-19 22:19:41,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 22:19:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 22:19:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-19 22:19:41,392 INFO L87 Difference]: Start difference. First operand 332 states and 424 transitions. Second operand 6 states. [2020-10-19 22:19:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:41,527 INFO L93 Difference]: Finished difference Result 718 states and 907 transitions. [2020-10-19 22:19:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 22:19:41,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-19 22:19:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:41,531 INFO L225 Difference]: With dead ends: 718 [2020-10-19 22:19:41,531 INFO L226 Difference]: Without dead ends: 533 [2020-10-19 22:19:41,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-19 22:19:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-19 22:19:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 497. [2020-10-19 22:19:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-19 22:19:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 635 transitions. [2020-10-19 22:19:41,554 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 635 transitions. Word has length 71 [2020-10-19 22:19:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:41,555 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 635 transitions. [2020-10-19 22:19:41,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 22:19:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 635 transitions. [2020-10-19 22:19:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-19 22:19:41,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:41,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:41,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 22:19:41,777 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:41,778 INFO L82 PathProgramCache]: Analyzing trace with hash 477662901, now seen corresponding path program 1 times [2020-10-19 22:19:41,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:41,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68981256] [2020-10-19 22:19:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-19 22:19:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68981256] [2020-10-19 22:19:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039481487] [2020-10-19 22:19:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:41,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 22:19:41,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-19 22:19:42,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:19:42,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2020-10-19 22:19:42,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862335160] [2020-10-19 22:19:42,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 22:19:42,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 22:19:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-19 22:19:42,095 INFO L87 Difference]: Start difference. First operand 497 states and 635 transitions. Second operand 7 states. [2020-10-19 22:19:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:42,354 INFO L93 Difference]: Finished difference Result 911 states and 1155 transitions. [2020-10-19 22:19:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 22:19:42,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2020-10-19 22:19:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:42,359 INFO L225 Difference]: With dead ends: 911 [2020-10-19 22:19:42,359 INFO L226 Difference]: Without dead ends: 719 [2020-10-19 22:19:42,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-19 22:19:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-10-19 22:19:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 657. [2020-10-19 22:19:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-19 22:19:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 836 transitions. [2020-10-19 22:19:42,391 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 836 transitions. Word has length 72 [2020-10-19 22:19:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:42,392 INFO L481 AbstractCegarLoop]: Abstraction has 657 states and 836 transitions. [2020-10-19 22:19:42,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 22:19:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 836 transitions. [2020-10-19 22:19:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-19 22:19:42,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:42,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:42,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:42,610 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1209630327, now seen corresponding path program 1 times [2020-10-19 22:19:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:42,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368562970] [2020-10-19 22:19:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-19 22:19:42,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368562970] [2020-10-19 22:19:42,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738180664] [2020-10-19 22:19:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:19:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:42,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 22:19:42,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-19 22:19:42,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:19:42,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-19 22:19:42,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994625188] [2020-10-19 22:19:42,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:19:42,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:19:42,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:19:42,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:19:42,942 INFO L87 Difference]: Start difference. First operand 657 states and 836 transitions. Second operand 10 states. [2020-10-19 22:19:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:43,297 INFO L93 Difference]: Finished difference Result 1428 states and 1800 transitions. [2020-10-19 22:19:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 22:19:43,303 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-19 22:19:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:43,306 INFO L225 Difference]: With dead ends: 1428 [2020-10-19 22:19:43,307 INFO L226 Difference]: Without dead ends: 798 [2020-10-19 22:19:43,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-19 22:19:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2020-10-19 22:19:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 540. [2020-10-19 22:19:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-10-19 22:19:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 692 transitions. [2020-10-19 22:19:43,339 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 692 transitions. Word has length 72 [2020-10-19 22:19:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:43,340 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 692 transitions. [2020-10-19 22:19:43,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:19:43,340 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 692 transitions. [2020-10-19 22:19:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-19 22:19:43,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:43,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:43,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 22:19:43,557 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1761051063, now seen corresponding path program 2 times [2020-10-19 22:19:43,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:19:43,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128797289] [2020-10-19 22:19:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:19:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:19:43,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:19:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:19:43,637 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:19:43,673 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:19:43,673 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:19:43,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 22:19:43,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:19:43 BoogieIcfgContainer [2020-10-19 22:19:43,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:19:43,747 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:19:43,747 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:19:43,747 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:19:43,748 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:33" (3/4) ... [2020-10-19 22:19:43,752 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 22:19:43,752 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:19:43,755 INFO L168 Benchmark]: Toolchain (without parser) took 10856.63 ms. Allocated memory was 35.7 MB in the beginning and 80.7 MB in the end (delta: 45.1 MB). Free memory was 13.0 MB in the beginning and 22.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 36.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,755 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 34.1 MB. Free memory was 19.1 MB in the beginning and 19.1 MB in the end (delta: 27.0 kB). Peak memory consumption was 27.0 kB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 517.71 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 12.2 MB in the beginning and 21.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,757 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.26 ms. Allocated memory is still 44.0 MB. Free memory was 21.6 MB in the beginning and 19.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,757 INFO L168 Benchmark]: Boogie Preprocessor took 33.59 ms. Allocated memory is still 44.0 MB. Free memory was 19.6 MB in the beginning and 17.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,758 INFO L168 Benchmark]: RCFGBuilder took 421.17 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 17.9 MB in the beginning and 22.3 MB in the end (delta: -4.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,759 INFO L168 Benchmark]: TraceAbstraction took 9823.51 ms. Allocated memory was 45.6 MB in the beginning and 80.7 MB in the end (delta: 35.1 MB). Free memory was 21.9 MB in the beginning and 23.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 33.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,759 INFO L168 Benchmark]: Witness Printer took 5.60 ms. Allocated memory is still 80.7 MB. Free memory was 23.1 MB in the beginning and 22.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:19:43,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 34.1 MB. Free memory was 19.1 MB in the beginning and 19.1 MB in the end (delta: 27.0 kB). Peak memory consumption was 27.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 517.71 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 12.2 MB in the beginning and 21.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 44.26 ms. Allocated memory is still 44.0 MB. Free memory was 21.6 MB in the beginning and 19.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 33.59 ms. Allocated memory is still 44.0 MB. Free memory was 19.6 MB in the beginning and 17.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 421.17 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 17.9 MB in the beginning and 22.3 MB in the end (delta: -4.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 9823.51 ms. Allocated memory was 45.6 MB in the beginning and 80.7 MB in the end (delta: 35.1 MB). Free memory was 21.9 MB in the beginning and 23.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 33.9 MB. Max. memory is 14.3 GB. * Witness Printer took 5.60 ms. Allocated memory is still 80.7 MB. Free memory was 23.1 MB in the beginning and 22.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 108, overapproximation of bitwiseAnd at line 88. Possible FailurePath: [L116] unsigned int a, b, r; [L118] b = __VERIFIER_nondet_uint() [L120] a = 234770789 [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND FALSE !(a3 == (unsigned char)0) [L60] nb = (unsigned char)4 [L61] COND TRUE b3 == (unsigned char)0 [L62] nb = nb - 1 [L63] COND TRUE b2 == (unsigned char)0 [L64] nb = nb - 1 [L65] COND TRUE b1 == (unsigned char)0 [L66] nb = nb - 1 [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND TRUE partial_sum > ((unsigned char)255) [L88] partial_sum = partial_sum & ((unsigned char)255) [L89] carry = (unsigned short)1 [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND FALSE !(i == (unsigned char)0) [L77] COND TRUE i == (unsigned char)1 [L77] partial_sum = partial_sum + a1 [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND TRUE i == (unsigned char)1 [L92] r1 = (unsigned char)partial_sum [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND FALSE !(i == (unsigned char)0) [L77] COND FALSE !(i == (unsigned char)1) [L78] COND TRUE i == (unsigned char)2 [L78] partial_sum = partial_sum + a2 [L79] COND FALSE !(i == (unsigned char)3) [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND FALSE !(i == (unsigned char)1) [L93] COND TRUE i == (unsigned char)2 [L93] r2 = (unsigned char)partial_sum [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND FALSE !(i == (unsigned char)0) [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND TRUE i == (unsigned char)3 [L79] partial_sum = partial_sum + a3 [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND TRUE i == (unsigned char)3 [L94] r3 = (unsigned char)partial_sum [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L122] r = mp_add(a, b) [L16] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "byte_add_1-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.6s, OverallIterations: 18, TraceHistogramMax: 4, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1245 SDtfs, 1704 SDslu, 1917 SDs, 0 SdLazy, 2393 SolverSat, 187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 477 GetRequests, 366 SyntacticMatches, 20 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=657occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 1792 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 1192 NumberOfCodeBlocks, 1192 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1096 ConstructedInterpolants, 0 QuantifiedInterpolants, 232578 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1089 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 24 InterpolantComputations, 16 PerfectInterpolantSequences, 864/892 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 0.1.25-9a8b2e8 [2020-10-19 22:19:46,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:19:46,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:19:46,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:19:46,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:19:46,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:19:46,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:19:46,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:19:46,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:19:46,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:19:46,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:19:46,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:19:46,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:19:46,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:19:46,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:19:46,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:19:46,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:19:46,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:19:46,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:19:46,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:19:46,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:19:46,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:19:46,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:19:46,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:19:46,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:19:46,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:19:46,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:19:46,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:19:46,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:19:46,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:19:46,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:19:46,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:19:46,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:19:46,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:19:46,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:19:46,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:19:46,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:19:46,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:19:46,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:19:46,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:19:46,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:19:46,149 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-19 22:19:46,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:19:46,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:19:46,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:19:46,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:19:46,198 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:19:46,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:19:46,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:19:46,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:19:46,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:19:46,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:19:46,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:19:46,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:19:46,201 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 22:19:46,202 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 22:19:46,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:19:46,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:19:46,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:19:46,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:19:46,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:19:46,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:19:46,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:19:46,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:19:46,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:19:46,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:19:46,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:19:46,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:19:46,210 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 22:19:46,210 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 22:19:46,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:19:46,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:19:46,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 22:19:46,211 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> a92d749021b3b94f4ecd59f60bbcb6b80102c08a [2020-10-19 22:19:46,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:19:46,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:19:46,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:19:46,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:19:46,445 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:19:46,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add_1-1.i [2020-10-19 22:19:46,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ab33f50/d09db9ae2e934336b3fddf926aa117f6/FLAG999b44604 [2020-10-19 22:19:46,991 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:19:46,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_1-1.i [2020-10-19 22:19:47,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ab33f50/d09db9ae2e934336b3fddf926aa117f6/FLAG999b44604 [2020-10-19 22:19:47,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ab33f50/d09db9ae2e934336b3fddf926aa117f6 [2020-10-19 22:19:47,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:19:47,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:19:47,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:19:47,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:19:47,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:19:47,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a9ff5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47, skipping insertion in model container [2020-10-19 22:19:47,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:19:47,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:19:47,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:19:47,720 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:19:47,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:19:47,795 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:19:47,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47 WrapperNode [2020-10-19 22:19:47,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:19:47,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:19:47,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:19:47,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:19:47,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:19:47,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:19:47,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:19:47,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:19:47,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (1/1) ... [2020-10-19 22:19:47,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:19:47,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:19:47,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:19:47,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:19:47,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (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 [2020-10-19 22:19:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 22:19:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:19:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:19:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:19:48,407 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:19:48,408 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:19:48,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:48 BoogieIcfgContainer [2020-10-19 22:19:48,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:19:48,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:19:48,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:19:48,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:19:48,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:19:47" (1/3) ... [2020-10-19 22:19:48,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79853209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:19:48, skipping insertion in model container [2020-10-19 22:19:48,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:19:47" (2/3) ... [2020-10-19 22:19:48,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79853209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:19:48, skipping insertion in model container [2020-10-19 22:19:48,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:48" (3/3) ... [2020-10-19 22:19:48,420 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2020-10-19 22:19:48,440 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:19:48,449 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:19:48,464 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:19:48,488 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:19:48,489 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:19:48,489 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:19:48,489 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:19:48,489 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:19:48,489 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:19:48,490 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:19:48,490 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:19:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-19 22:19:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:19:48,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:48,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:48,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash 300651760, now seen corresponding path program 1 times [2020-10-19 22:19:48,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:48,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697951890] [2020-10-19 22:19:48,533 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 [2020-10-19 22:19:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-19 22:19:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:48,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:48,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697951890] [2020-10-19 22:19:48,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:48,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 22:19:48,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953882493] [2020-10-19 22:19:48,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:19:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:19:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:19:48,668 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2020-10-19 22:19:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:48,690 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2020-10-19 22:19:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:19:48,692 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-19 22:19:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:48,702 INFO L225 Difference]: With dead ends: 62 [2020-10-19 22:19:48,702 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 22:19:48,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:19:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 22:19:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-19 22:19:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 22:19:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-10-19 22:19:48,748 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 14 [2020-10-19 22:19:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:48,749 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-10-19 22:19:48,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:19:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-10-19 22:19:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:19:48,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:48,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:48,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 22:19:48,959 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2025375790, now seen corresponding path program 1 times [2020-10-19 22:19:48,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:48,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462329843] [2020-10-19 22:19:48,963 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 [2020-10-19 22:19:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 22:19:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:49,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:49,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462329843] [2020-10-19 22:19:49,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:49,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-19 22:19:49,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099559679] [2020-10-19 22:19:49,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 22:19:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 22:19:49,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:19:49,156 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-10-19 22:19:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:49,741 INFO L93 Difference]: Finished difference Result 188 states and 323 transitions. [2020-10-19 22:19:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 22:19:49,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-19 22:19:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:49,745 INFO L225 Difference]: With dead ends: 188 [2020-10-19 22:19:49,745 INFO L226 Difference]: Without dead ends: 158 [2020-10-19 22:19:49,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-19 22:19:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 99. [2020-10-19 22:19:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-19 22:19:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 154 transitions. [2020-10-19 22:19:49,764 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 154 transitions. Word has length 14 [2020-10-19 22:19:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:49,764 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 154 transitions. [2020-10-19 22:19:49,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 22:19:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 154 transitions. [2020-10-19 22:19:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:19:49,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:49,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:49,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-19 22:19:49,979 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash -190419907, now seen corresponding path program 1 times [2020-10-19 22:19:49,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:49,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270839076] [2020-10-19 22:19:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 22:19:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:50,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 22:19:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:50,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:50,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270839076] [2020-10-19 22:19:50,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:50,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-19 22:19:50,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298600198] [2020-10-19 22:19:50,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:50,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:50,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:50,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:19:50,077 INFO L87 Difference]: Start difference. First operand 99 states and 154 transitions. Second operand 4 states. [2020-10-19 22:19:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:50,090 INFO L93 Difference]: Finished difference Result 106 states and 160 transitions. [2020-10-19 22:19:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:19:50,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-19 22:19:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:50,092 INFO L225 Difference]: With dead ends: 106 [2020-10-19 22:19:50,092 INFO L226 Difference]: Without dead ends: 62 [2020-10-19 22:19:50,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:19:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-19 22:19:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-19 22:19:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 22:19:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2020-10-19 22:19:50,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 16 [2020-10-19 22:19:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:50,101 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2020-10-19 22:19:50,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2020-10-19 22:19:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-19 22:19:50,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:50,103 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:50,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-19 22:19:50,324 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:50,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1410117190, now seen corresponding path program 1 times [2020-10-19 22:19:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:50,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780368757] [2020-10-19 22:19:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 22:19:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 22:19:50,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 22:19:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780368757] [2020-10-19 22:19:50,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:50,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-19 22:19:50,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903986624] [2020-10-19 22:19:50,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 22:19:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 22:19:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:19:50,462 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 6 states. [2020-10-19 22:19:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:50,854 INFO L93 Difference]: Finished difference Result 232 states and 334 transitions. [2020-10-19 22:19:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 22:19:50,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-19 22:19:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:50,856 INFO L225 Difference]: With dead ends: 232 [2020-10-19 22:19:50,856 INFO L226 Difference]: Without dead ends: 181 [2020-10-19 22:19:50,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-19 22:19:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 133. [2020-10-19 22:19:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-19 22:19:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 192 transitions. [2020-10-19 22:19:50,876 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 192 transitions. Word has length 40 [2020-10-19 22:19:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:50,876 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 192 transitions. [2020-10-19 22:19:50,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 22:19:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 192 transitions. [2020-10-19 22:19:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-19 22:19:50,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:50,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:51,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-19 22:19:51,087 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:51,088 INFO L82 PathProgramCache]: Analyzing trace with hash 590403523, now seen corresponding path program 1 times [2020-10-19 22:19:51,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:51,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799231417] [2020-10-19 22:19:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:51,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 22:19:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:51,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799231417] [2020-10-19 22:19:51,167 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 8) [2020-10-19 22:19:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1271830567] [2020-10-19 22:19:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:19:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 22:19:51,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 22:19:51,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 22:19:51,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:51,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-19 22:19:51,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749004529] [2020-10-19 22:19:51,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:51,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:51,312 INFO L87 Difference]: Start difference. First operand 133 states and 192 transitions. Second operand 4 states. [2020-10-19 22:19:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:51,531 INFO L93 Difference]: Finished difference Result 340 states and 538 transitions. [2020-10-19 22:19:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:51,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-19 22:19:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:51,534 INFO L225 Difference]: With dead ends: 340 [2020-10-19 22:19:51,534 INFO L226 Difference]: Without dead ends: 226 [2020-10-19 22:19:51,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-19 22:19:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-19 22:19:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-19 22:19:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 326 transitions. [2020-10-19 22:19:51,581 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 326 transitions. Word has length 42 [2020-10-19 22:19:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:51,582 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 326 transitions. [2020-10-19 22:19:51,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 326 transitions. [2020-10-19 22:19:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-19 22:19:51,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:51,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:52,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3 [2020-10-19 22:19:52,003 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:52,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1710975165, now seen corresponding path program 1 times [2020-10-19 22:19:52,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:52,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472615895] [2020-10-19 22:19:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:52,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 22:19:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 22:19:52,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 22:19:52,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472615895] [2020-10-19 22:19:52,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:52,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-19 22:19:52,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193122302] [2020-10-19 22:19:52,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:19:52,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:19:52,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:19:52,215 INFO L87 Difference]: Start difference. First operand 222 states and 326 transitions. Second operand 10 states. [2020-10-19 22:19:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:53,002 INFO L93 Difference]: Finished difference Result 654 states and 960 transitions. [2020-10-19 22:19:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 22:19:53,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-19 22:19:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:53,006 INFO L225 Difference]: With dead ends: 654 [2020-10-19 22:19:53,007 INFO L226 Difference]: Without dead ends: 520 [2020-10-19 22:19:53,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-19 22:19:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-10-19 22:19:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 373. [2020-10-19 22:19:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-19 22:19:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 543 transitions. [2020-10-19 22:19:53,053 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 543 transitions. Word has length 42 [2020-10-19 22:19:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:53,054 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 543 transitions. [2020-10-19 22:19:53,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:19:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 543 transitions. [2020-10-19 22:19:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-19 22:19:53,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:53,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:53,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-19 22:19:53,279 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1119687319, now seen corresponding path program 1 times [2020-10-19 22:19:53,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:53,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981329516] [2020-10-19 22:19:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 22:19:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:53,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:53,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981329516] [2020-10-19 22:19:53,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:53,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-10-19 22:19:53,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038948791] [2020-10-19 22:19:53,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:19:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:19:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:53,419 INFO L87 Difference]: Start difference. First operand 373 states and 543 transitions. Second operand 5 states. [2020-10-19 22:19:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:53,652 INFO L93 Difference]: Finished difference Result 733 states and 1077 transitions. [2020-10-19 22:19:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:19:53,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-19 22:19:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:53,659 INFO L225 Difference]: With dead ends: 733 [2020-10-19 22:19:53,659 INFO L226 Difference]: Without dead ends: 383 [2020-10-19 22:19:53,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:19:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-19 22:19:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 358. [2020-10-19 22:19:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-19 22:19:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 511 transitions. [2020-10-19 22:19:53,683 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 511 transitions. Word has length 45 [2020-10-19 22:19:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:53,684 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 511 transitions. [2020-10-19 22:19:53,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:19:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 511 transitions. [2020-10-19 22:19:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-19 22:19:53,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:53,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:53,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-19 22:19:53,902 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 850489489, now seen corresponding path program 1 times [2020-10-19 22:19:53,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:53,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556882976] [2020-10-19 22:19:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 22:19:53,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556882976] [2020-10-19 22:19:53,992 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 16) [2020-10-19 22:19:53,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1315142143] [2020-10-19 22:19:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:19:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 22:19:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 22:19:54,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 22:19:54,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:19:54,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-19 22:19:54,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248674380] [2020-10-19 22:19:54,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:19:54,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:19:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:54,126 INFO L87 Difference]: Start difference. First operand 358 states and 511 transitions. Second operand 4 states. [2020-10-19 22:19:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:54,150 INFO L93 Difference]: Finished difference Result 496 states and 702 transitions. [2020-10-19 22:19:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:19:54,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-19 22:19:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:54,153 INFO L225 Difference]: With dead ends: 496 [2020-10-19 22:19:54,154 INFO L226 Difference]: Without dead ends: 468 [2020-10-19 22:19:54,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:19:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-19 22:19:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 438. [2020-10-19 22:19:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-19 22:19:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 626 transitions. [2020-10-19 22:19:54,174 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 626 transitions. Word has length 46 [2020-10-19 22:19:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:54,174 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 626 transitions. [2020-10-19 22:19:54,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:19:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 626 transitions. [2020-10-19 22:19:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-19 22:19:54,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:54,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:54,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:19:54,587 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash -160627761, now seen corresponding path program 1 times [2020-10-19 22:19:54,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:54,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472770103] [2020-10-19 22:19:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:54,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 22:19:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:54,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:54,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472770103] [2020-10-19 22:19:54,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:19:54,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-19 22:19:54,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469752446] [2020-10-19 22:19:54,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:19:54,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:19:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:19:54,777 INFO L87 Difference]: Start difference. First operand 438 states and 626 transitions. Second operand 10 states. [2020-10-19 22:19:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:55,311 INFO L93 Difference]: Finished difference Result 1154 states and 1748 transitions. [2020-10-19 22:19:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:19:55,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-19 22:19:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:55,316 INFO L225 Difference]: With dead ends: 1154 [2020-10-19 22:19:55,316 INFO L226 Difference]: Without dead ends: 736 [2020-10-19 22:19:55,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2020-10-19 22:19:55,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-10-19 22:19:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 589. [2020-10-19 22:19:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-10-19 22:19:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 859 transitions. [2020-10-19 22:19:55,350 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 859 transitions. Word has length 46 [2020-10-19 22:19:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:55,350 INFO L481 AbstractCegarLoop]: Abstraction has 589 states and 859 transitions. [2020-10-19 22:19:55,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:19:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 859 transitions. [2020-10-19 22:19:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-19 22:19:55,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:55,352 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:55,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-10-19 22:19:55,573 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1209630327, now seen corresponding path program 1 times [2020-10-19 22:19:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:55,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932175985] [2020-10-19 22:19:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:19:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 22:19:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-19 22:19:55,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-19 22:19:55,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932175985] [2020-10-19 22:19:55,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:19:55,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-19 22:19:55,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286020388] [2020-10-19 22:19:55,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:19:55,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:19:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:19:55,787 INFO L87 Difference]: Start difference. First operand 589 states and 859 transitions. Second operand 10 states. [2020-10-19 22:19:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:56,194 INFO L93 Difference]: Finished difference Result 1781 states and 2525 transitions. [2020-10-19 22:19:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 22:19:56,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-19 22:19:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:56,203 INFO L225 Difference]: With dead ends: 1781 [2020-10-19 22:19:56,203 INFO L226 Difference]: Without dead ends: 1215 [2020-10-19 22:19:56,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-19 22:19:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2020-10-19 22:19:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 768. [2020-10-19 22:19:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-19 22:19:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1131 transitions. [2020-10-19 22:19:56,244 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1131 transitions. Word has length 72 [2020-10-19 22:19:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:56,245 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 1131 transitions. [2020-10-19 22:19:56,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:19:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1131 transitions. [2020-10-19 22:19:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-19 22:19:56,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:56,247 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:56,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-10-19 22:19:56,469 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -162176971, now seen corresponding path program 2 times [2020-10-19 22:19:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:56,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763521894] [2020-10-19 22:19:56,471 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 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:56,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:19:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:19:56,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 22:19:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 22:19:56,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:19:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 22:19:56,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763521894] [2020-10-19 22:19:56,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:19:56,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-19 22:19:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928441575] [2020-10-19 22:19:56,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 22:19:56,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:19:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 22:19:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-19 22:19:56,710 INFO L87 Difference]: Start difference. First operand 768 states and 1131 transitions. Second operand 9 states. [2020-10-19 22:19:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:19:57,004 INFO L93 Difference]: Finished difference Result 1876 states and 2630 transitions. [2020-10-19 22:19:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 22:19:57,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-19 22:19:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:19:57,011 INFO L225 Difference]: With dead ends: 1876 [2020-10-19 22:19:57,011 INFO L226 Difference]: Without dead ends: 1131 [2020-10-19 22:19:57,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-19 22:19:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2020-10-19 22:19:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 711. [2020-10-19 22:19:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-10-19 22:19:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1004 transitions. [2020-10-19 22:19:57,059 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1004 transitions. Word has length 72 [2020-10-19 22:19:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:19:57,059 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 1004 transitions. [2020-10-19 22:19:57,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 22:19:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1004 transitions. [2020-10-19 22:19:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-19 22:19:57,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:19:57,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:19:57,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-10-19 22:19:57,283 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:19:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:19:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1761051063, now seen corresponding path program 3 times [2020-10-19 22:19:57,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:19:57,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002702277] [2020-10-19 22:19:57,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-10-19 22:19:57,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-19 22:19:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:19:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-19 22:19:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:19:58,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-19 22:19:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:19:59,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:20:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:20:02,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002702277] [2020-10-19 22:20:02,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:20:02,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2020-10-19 22:20:02,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759986578] [2020-10-19 22:20:02,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-19 22:20:02,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:20:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-19 22:20:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2020-10-19 22:20:02,460 INFO L87 Difference]: Start difference. First operand 711 states and 1004 transitions. Second operand 46 states. [2020-10-19 22:20:06,464 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-19 22:20:06,761 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 84 [2020-10-19 22:20:07,244 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-19 22:20:07,558 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 91 [2020-10-19 22:20:07,999 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2020-10-19 22:20:08,245 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-19 22:20:08,524 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 87 [2020-10-19 22:20:08,940 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-19 22:20:09,240 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 93 [2020-10-19 22:20:09,695 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2020-10-19 22:20:10,116 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2020-10-19 22:20:10,714 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 99 [2020-10-19 22:20:11,082 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-19 22:20:11,404 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 85 [2020-10-19 22:20:11,663 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-10-19 22:20:12,259 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 92 [2020-10-19 22:20:12,674 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 98 [2020-10-19 22:20:13,028 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 87 [2020-10-19 22:20:13,871 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2020-10-19 22:20:14,773 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2020-10-19 22:20:15,673 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 104 [2020-10-19 22:20:16,196 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-19 22:20:16,537 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2020-10-19 22:20:17,424 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 84 [2020-10-19 22:20:18,163 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-19 22:20:18,488 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2020-10-19 22:20:18,791 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 84 [2020-10-19 22:20:19,155 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 92 [2020-10-19 22:20:19,817 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 98 [2020-10-19 22:20:20,185 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 97 [2020-10-19 22:20:20,487 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2020-10-19 22:20:20,839 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 96 [2020-10-19 22:20:21,136 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-19 22:20:21,524 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 92 [2020-10-19 22:20:21,818 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 96 [2020-10-19 22:20:22,498 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-19 22:20:22,934 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-19 22:20:23,486 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2020-10-19 22:20:23,796 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-10-19 22:20:24,072 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 90 [2020-10-19 22:20:24,516 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-10-19 22:20:25,634 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-10-19 22:20:27,361 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 86 [2020-10-19 22:20:28,234 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 90 [2020-10-19 22:20:29,686 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-19 22:20:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:20:30,974 INFO L93 Difference]: Finished difference Result 3521 states and 4744 transitions. [2020-10-19 22:20:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-19 22:20:30,975 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 72 [2020-10-19 22:20:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:20:30,991 INFO L225 Difference]: With dead ends: 3521 [2020-10-19 22:20:30,991 INFO L226 Difference]: Without dead ends: 3234 [2020-10-19 22:20:30,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=3010, Invalid=14546, Unknown=0, NotChecked=0, Total=17556 [2020-10-19 22:20:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2020-10-19 22:20:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 1452. [2020-10-19 22:20:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1452 states. [2020-10-19 22:20:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2122 transitions. [2020-10-19 22:20:31,089 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2122 transitions. Word has length 72 [2020-10-19 22:20:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:20:31,090 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 2122 transitions. [2020-10-19 22:20:31,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-19 22:20:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2122 transitions. [2020-10-19 22:20:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-19 22:20:31,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:20:31,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:20:31,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-10-19 22:20:31,308 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:20:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:20:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1780583833, now seen corresponding path program 1 times [2020-10-19 22:20:31,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:20:31,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968032414] [2020-10-19 22:20:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-19 22:20:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:20:31,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-19 22:20:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:20:32,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968032414] [2020-10-19 22:20:32,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 16) [2020-10-19 22:20:32,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1328644332] [2020-10-19 22:20:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:20:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:20:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-19 22:20:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:20:32,869 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 16) [2020-10-19 22:20:32,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864698608] [2020-10-19 22:20:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:20:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:20:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-19 22:20:32,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:20:32,951 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 16) [2020-10-19 22:20:32,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:20:32,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 22:20:32,952 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-19 22:20:32,952 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:20:33,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:20:33,606 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 22:20:33,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:20:33 BoogieIcfgContainer [2020-10-19 22:20:33,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:20:33,608 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:20:33,608 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:20:33,608 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:20:33,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:19:48" (3/4) ... [2020-10-19 22:20:33,613 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 22:20:33,613 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:20:33,614 INFO L168 Benchmark]: Toolchain (without parser) took 46270.29 ms. Allocated memory was 35.1 MB in the beginning and 143.7 MB in the end (delta: 108.5 MB). Free memory was 9.2 MB in the beginning and 95.0 MB in the end (delta: -85.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:20:33,615 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 34.1 MB. Free memory was 13.2 MB in the beginning and 13.2 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. [2020-10-19 22:20:33,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 445.44 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 8.3 MB in the beginning and 24.2 MB in the end (delta: -15.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:20:33,616 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.95 ms. Allocated memory is still 44.6 MB. Free memory was 24.2 MB in the beginning and 22.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:20:33,617 INFO L168 Benchmark]: Boogie Preprocessor took 37.01 ms. Allocated memory is still 44.6 MB. Free memory was 22.1 MB in the beginning and 20.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:20:33,617 INFO L168 Benchmark]: RCFGBuilder took 525.48 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 20.3 MB in the beginning and 12.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:20:33,618 INFO L168 Benchmark]: TraceAbstraction took 45196.03 ms. Allocated memory was 46.7 MB in the beginning and 143.7 MB in the end (delta: 97.0 MB). Free memory was 11.5 MB in the beginning and 95.0 MB in the end (delta: -83.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:20:33,618 INFO L168 Benchmark]: Witness Printer took 5.28 ms. Allocated memory is still 143.7 MB. Free memory is still 95.0 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:20:33,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 34.1 MB. Free memory was 13.2 MB in the beginning and 13.2 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 445.44 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 8.3 MB in the beginning and 24.2 MB in the end (delta: -15.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 49.95 ms. Allocated memory is still 44.6 MB. Free memory was 24.2 MB in the beginning and 22.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 37.01 ms. Allocated memory is still 44.6 MB. Free memory was 22.1 MB in the beginning and 20.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 525.48 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 20.3 MB in the beginning and 12.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 45196.03 ms. Allocated memory was 46.7 MB in the beginning and 143.7 MB in the end (delta: 97.0 MB). Free memory was 11.5 MB in the beginning and 95.0 MB in the end (delta: -83.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 14.3 GB. * Witness Printer took 5.28 ms. Allocated memory is still 143.7 MB. Free memory is still 95.0 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L116] unsigned int a, b, r; [L118] b = __VERIFIER_nondet_uint() [L120] a = 234770789 [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND FALSE !(a3 == (unsigned char)0) [L60] nb = (unsigned char)4 [L61] COND TRUE b3 == (unsigned char)0 [L62] nb = nb - 1 [L63] COND TRUE b2 == (unsigned char)0 [L64] nb = nb - 1 [L65] COND FALSE !(b1 == (unsigned char)0) [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND TRUE partial_sum > ((unsigned char)255) [L88] partial_sum = partial_sum & ((unsigned char)255) [L89] carry = (unsigned short)1 [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND FALSE !(i == (unsigned char)0) [L77] COND TRUE i == (unsigned char)1 [L77] partial_sum = partial_sum + a1 [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND FALSE !(i == (unsigned char)0) [L83] COND TRUE i == (unsigned char)1 [L83] partial_sum = partial_sum + b1 [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND TRUE partial_sum > ((unsigned char)255) [L88] partial_sum = partial_sum & ((unsigned char)255) [L89] carry = (unsigned short)1 [L91] COND FALSE !(i == (unsigned char)0) [L92] COND TRUE i == (unsigned char)1 [L92] r1 = (unsigned char)partial_sum [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND FALSE !(i == (unsigned char)0) [L77] COND FALSE !(i == (unsigned char)1) [L78] COND TRUE i == (unsigned char)2 [L78] partial_sum = partial_sum + a2 [L79] COND FALSE !(i == (unsigned char)3) [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND FALSE !(i == (unsigned char)1) [L93] COND TRUE i == (unsigned char)2 [L93] r2 = (unsigned char)partial_sum [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND FALSE !(i == (unsigned char)0) [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND TRUE i == (unsigned char)3 [L79] partial_sum = partial_sum + a3 [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND TRUE i == (unsigned char)3 [L94] r3 = (unsigned char)partial_sum [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L122] r = mp_add(a, b) [L16] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "byte_add_1-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 45.0s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 32.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1196 SDtfs, 5802 SDslu, 10672 SDs, 0 SdLazy, 7026 SolverSat, 1206 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1170 GetRequests, 956 SyntacticMatches, 6 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 24.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1452occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 3109 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 521 NumberOfCodeBlocks, 521 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1018 ConstructedInterpolants, 7 QuantifiedInterpolants, 686294 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1118 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 24 InterpolantComputations, 16 PerfectInterpolantSequences, 449/672 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...