./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48b1d947ee7d32af92c51ce8206d03b05796efe0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48b1d947ee7d32af92c51ce8206d03b05796efe0 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 01:10:57,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:10:57,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:10:57,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:10:57,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:10:57,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:10:57,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:10:57,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:10:57,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:10:57,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:10:57,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:10:57,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:10:57,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:10:57,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:10:57,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:10:57,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:10:57,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:10:57,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:10:57,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:10:57,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:10:57,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:10:57,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:10:57,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:10:57,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:10:57,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:10:57,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:10:57,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:10:57,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:10:57,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:10:57,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:10:57,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:10:57,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:10:57,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:10:57,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:10:57,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:10:57,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:10:57,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:10:57,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:10:57,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:10:57,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:10:57,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:10:57,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 01:10:57,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:10:57,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:10:57,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:10:57,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:10:57,761 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:10:57,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:10:57,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:10:57,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 01:10:57,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:10:57,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:10:57,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:10:57,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:10:57,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:10:57,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:10:57,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:10:57,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:10:57,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:10:57,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:10:57,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:10:57,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:10:57,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:10:57,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:10:57,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:10:57,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:10:57,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 01:10:57,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 01:10:57,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:10:57,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:10:57,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b1d947ee7d32af92c51ce8206d03b05796efe0 [2020-12-03 01:10:58,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:10:58,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:10:58,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:10:58,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:10:58,247 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:10:58,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2020-12-03 01:10:58,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2181472e/bdb2edb37066426c84d3ea999de81b9a/FLAG6e522b71e [2020-12-03 01:10:59,069 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:10:59,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2020-12-03 01:10:59,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2181472e/bdb2edb37066426c84d3ea999de81b9a/FLAG6e522b71e [2020-12-03 01:10:59,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2181472e/bdb2edb37066426c84d3ea999de81b9a [2020-12-03 01:10:59,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:10:59,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:10:59,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:10:59,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:10:59,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:10:59,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162674e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59, skipping insertion in model container [2020-12-03 01:10:59,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:10:59,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:10:59,766 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2020-12-03 01:10:59,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:10:59,796 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:10:59,812 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2020-12-03 01:10:59,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:10:59,838 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:10:59,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59 WrapperNode [2020-12-03 01:10:59,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:10:59,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:10:59,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:10:59,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:10:59,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:10:59,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:10:59,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:10:59,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:10:59,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... [2020-12-03 01:10:59,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:10:59,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:10:59,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:10:59,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:10:59,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:11:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 01:11:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:11:00,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:11:00,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:11:00,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:11:00,317 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:11:00,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:00 BoogieIcfgContainer [2020-12-03 01:11:00,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:11:00,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:11:00,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:11:00,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:11:00,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:10:59" (1/3) ... [2020-12-03 01:11:00,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44082865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:11:00, skipping insertion in model container [2020-12-03 01:11:00,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:10:59" (2/3) ... [2020-12-03 01:11:00,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44082865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:11:00, skipping insertion in model container [2020-12-03 01:11:00,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:00" (3/3) ... [2020-12-03 01:11:00,342 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.c [2020-12-03 01:11:00,376 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:11:00,387 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:11:00,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:11:00,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:11:00,465 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:11:00,465 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:11:00,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:11:00,465 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:11:00,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:11:00,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:11:00,466 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:11:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-03 01:11:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:11:00,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:00,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:00,490 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-03 01:11:00,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:00,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786122212] [2020-12-03 01:11:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:00,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786122212] [2020-12-03 01:11:00,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:00,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:11:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699563575] [2020-12-03 01:11:00,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:11:00,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:00,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:11:00,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:11:00,699 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-03 01:11:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:00,724 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-03 01:11:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:11:00,726 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 01:11:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:00,737 INFO L225 Difference]: With dead ends: 79 [2020-12-03 01:11:00,737 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:11:00,741 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 [2020-12-03 01:11:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:11:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:11:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:11:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:11:00,782 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-03 01:11:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:00,782 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:11:00,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:11:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:11:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:11:00,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:00,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:00,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 01:11:00,784 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-03 01:11:00,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:00,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936806626] [2020-12-03 01:11:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:00,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936806626] [2020-12-03 01:11:00,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:00,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:00,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371336043] [2020-12-03 01:11:00,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:00,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:00,884 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:11:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:01,084 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-03 01:11:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:11:01,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-03 01:11:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:01,089 INFO L225 Difference]: With dead ends: 61 [2020-12-03 01:11:01,089 INFO L226 Difference]: Without dead ends: 59 [2020-12-03 01:11:01,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-03 01:11:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-12-03 01:11:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:11:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:11:01,115 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-03 01:11:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:01,116 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:11:01,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:11:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:11:01,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:01,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:01,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 01:11:01,120 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-03 01:11:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:01,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238737830] [2020-12-03 01:11:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:01,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238737830] [2020-12-03 01:11:01,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:01,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 01:11:01,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175205655] [2020-12-03 01:11:01,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:01,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:01,211 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:11:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:01,240 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-03 01:11:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:01,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:11:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:01,242 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:11:01,242 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:11:01,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:11:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:11:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:11:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:11:01,250 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-03 01:11:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:01,250 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:11:01,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:11:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:11:01,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:01,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:01,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 01:11:01,251 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:01,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-03 01:11:01,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:01,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852183510] [2020-12-03 01:11:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:01,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852183510] [2020-12-03 01:11:01,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:01,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:01,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605567084] [2020-12-03 01:11:01,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:01,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:01,341 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:11:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:01,435 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:11:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:11:01,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:11:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:01,437 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:11:01,437 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:11:01,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:11:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:11:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:11:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:11:01,445 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-03 01:11:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:01,446 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:11:01,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:11:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 01:11:01,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:01,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:01,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 01:11:01,448 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-03 01:11:01,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:01,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332128593] [2020-12-03 01:11:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:01,469 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:01,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461686392] [2020-12-03 01:11:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-03 01:11:01,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:01,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332128593] [2020-12-03 01:11:01,656 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:01,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461686392] [2020-12-03 01:11:01,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:01,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-03 01:11:01,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394939466] [2020-12-03 01:11:01,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:11:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:11:01,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:11:01,663 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-12-03 01:11:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:01,927 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-03 01:11:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:11:01,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-03 01:11:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:01,928 INFO L225 Difference]: With dead ends: 81 [2020-12-03 01:11:01,928 INFO L226 Difference]: Without dead ends: 58 [2020-12-03 01:11:01,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-03 01:11:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-03 01:11:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-03 01:11:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 01:11:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-03 01:11:01,947 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-03 01:11:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:01,948 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-03 01:11:01,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:11:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-03 01:11:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 01:11:01,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:01,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:02,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:02,160 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-03 01:11:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504071888] [2020-12-03 01:11:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:02,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:02,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653244388] [2020-12-03 01:11:02,176 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 [2020-12-03 01:11:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:02,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:11:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:02,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504071888] [2020-12-03 01:11:02,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:02,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653244388] [2020-12-03 01:11:02,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:02,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 01:11:02,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567751070] [2020-12-03 01:11:02,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:11:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:02,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:11:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:11:02,350 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 7 states. [2020-12-03 01:11:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:02,611 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-03 01:11:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:11:02,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-03 01:11:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:02,612 INFO L225 Difference]: With dead ends: 53 [2020-12-03 01:11:02,612 INFO L226 Difference]: Without dead ends: 41 [2020-12-03 01:11:02,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:11:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-03 01:11:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-03 01:11:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-03 01:11:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-03 01:11:02,619 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 16 [2020-12-03 01:11:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:02,619 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-03 01:11:02,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:11:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-03 01:11:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 01:11:02,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:02,620 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:02,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:02,836 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1571159167, now seen corresponding path program 1 times [2020-12-03 01:11:02,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:02,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017034860] [2020-12-03 01:11:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:02,851 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:02,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920781983] [2020-12-03 01:11:02,852 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 [2020-12-03 01:11:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:11:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:02,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017034860] [2020-12-03 01:11:02,963 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:02,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920781983] [2020-12-03 01:11:02,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:11:02,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-03 01:11:02,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939071259] [2020-12-03 01:11:02,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 01:11:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:02,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 01:11:02,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:02,972 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-12-03 01:11:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:03,007 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-03 01:11:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:11:03,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-03 01:11:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:03,008 INFO L225 Difference]: With dead ends: 62 [2020-12-03 01:11:03,008 INFO L226 Difference]: Without dead ends: 43 [2020-12-03 01:11:03,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:11:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-03 01:11:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-03 01:11:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-03 01:11:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-03 01:11:03,033 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 18 [2020-12-03 01:11:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:03,034 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-03 01:11:03,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 01:11:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-03 01:11:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:11:03,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:03,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:03,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:03,250 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:03,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-03 01:11:03,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:03,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784578291] [2020-12-03 01:11:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:03,262 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:03,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243145613] [2020-12-03 01:11:03,263 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 [2020-12-03 01:11:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-03 01:11:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:03,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784578291] [2020-12-03 01:11:03,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:03,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243145613] [2020-12-03 01:11:03,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:11:03,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-03 01:11:03,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14417070] [2020-12-03 01:11:03,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:11:03,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:03,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:11:03,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:11:03,614 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-12-03 01:11:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:04,147 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-12-03 01:11:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 01:11:04,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:11:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:04,151 INFO L225 Difference]: With dead ends: 83 [2020-12-03 01:11:04,151 INFO L226 Difference]: Without dead ends: 71 [2020-12-03 01:11:04,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:11:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-03 01:11:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-12-03 01:11:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-03 01:11:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-03 01:11:04,171 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-12-03 01:11:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:04,171 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-03 01:11:04,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:11:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-03 01:11:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-03 01:11:04,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:04,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:04,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:04,377 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1958905870, now seen corresponding path program 1 times [2020-12-03 01:11:04,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:04,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987412536] [2020-12-03 01:11:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:04,392 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:04,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327293442] [2020-12-03 01:11:04,393 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 [2020-12-03 01:11:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:11:04,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:04,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987412536] [2020-12-03 01:11:04,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:04,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327293442] [2020-12-03 01:11:04,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:11:04,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-03 01:11:04,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193675850] [2020-12-03 01:11:04,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:11:04,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:11:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:11:04,637 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 7 states. [2020-12-03 01:11:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:07,018 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-12-03 01:11:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:11:07,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-03 01:11:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:07,020 INFO L225 Difference]: With dead ends: 74 [2020-12-03 01:11:07,020 INFO L226 Difference]: Without dead ends: 70 [2020-12-03 01:11:07,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:11:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-03 01:11:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-03 01:11:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 01:11:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-12-03 01:11:07,029 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 24 [2020-12-03 01:11:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:07,029 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-12-03 01:11:07,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:11:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-12-03 01:11:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:11:07,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:07,031 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] [2020-12-03 01:11:07,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:07,246 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-03 01:11:07,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:07,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806260289] [2020-12-03 01:11:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:07,259 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:07,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545326094] [2020-12-03 01:11:07,260 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 [2020-12-03 01:11:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:07,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:11:07,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:07,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806260289] [2020-12-03 01:11:07,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:07,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545326094] [2020-12-03 01:11:07,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:11:07,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-03 01:11:07,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186450579] [2020-12-03 01:11:07,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:11:07,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:07,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:11:07,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:11:07,391 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 6 states. [2020-12-03 01:11:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:07,424 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-12-03 01:11:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:11:07,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-03 01:11:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:07,426 INFO L225 Difference]: With dead ends: 71 [2020-12-03 01:11:07,426 INFO L226 Difference]: Without dead ends: 65 [2020-12-03 01:11:07,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:11:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-03 01:11:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-03 01:11:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 01:11:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-03 01:11:07,435 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 27 [2020-12-03 01:11:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:07,435 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-03 01:11:07,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:11:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-03 01:11:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 01:11:07,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:07,437 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:07,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:07,653 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:07,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1875627766, now seen corresponding path program 1 times [2020-12-03 01:11:07,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:07,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586795302] [2020-12-03 01:11:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:07,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:07,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37116053] [2020-12-03 01:11:07,670 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 [2020-12-03 01:11:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:11:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586795302] [2020-12-03 01:11:07,783 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37116053] [2020-12-03 01:11:07,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:11:07,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-03 01:11:07,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782730004] [2020-12-03 01:11:07,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:11:07,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:11:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:11:07,785 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 6 states. [2020-12-03 01:11:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:07,829 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-12-03 01:11:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:11:07,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-03 01:11:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:07,831 INFO L225 Difference]: With dead ends: 94 [2020-12-03 01:11:07,831 INFO L226 Difference]: Without dead ends: 66 [2020-12-03 01:11:07,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:11:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-03 01:11:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-03 01:11:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-03 01:11:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-12-03 01:11:07,840 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 28 [2020-12-03 01:11:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:07,840 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-12-03 01:11:07,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:11:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-12-03 01:11:07,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 01:11:07,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:07,842 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:08,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:08,057 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1711245194, now seen corresponding path program 2 times [2020-12-03 01:11:08,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:08,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653426733] [2020-12-03 01:11:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:08,070 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:08,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72194868] [2020-12-03 01:11:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:08,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-03 01:11:08,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 01:11:08,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-03 01:11:08,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653426733] [2020-12-03 01:11:08,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72194868] [2020-12-03 01:11:08,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:11:08,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-03 01:11:08,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299733513] [2020-12-03 01:11:08,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-03 01:11:08,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:11:08,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-03 01:11:08,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-03 01:11:08,809 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 11 states. [2020-12-03 01:11:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:09,854 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-12-03 01:11:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 01:11:09,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-12-03 01:11:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:09,856 INFO L225 Difference]: With dead ends: 103 [2020-12-03 01:11:09,856 INFO L226 Difference]: Without dead ends: 93 [2020-12-03 01:11:09,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-03 01:11:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-03 01:11:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-12-03 01:11:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-03 01:11:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-03 01:11:09,870 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 28 [2020-12-03 01:11:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:09,879 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-03 01:11:09,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-03 01:11:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-03 01:11:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-03 01:11:09,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:09,882 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] [2020-12-03 01:11:10,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-03 01:11:10,087 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:10,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-03 01:11:10,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:11:10,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490536572] [2020-12-03 01:11:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:11:10,107 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:11:10,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669378867] [2020-12-03 01:11:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:11:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-03 01:11:14,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:14,812 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:14,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-03 01:11:14,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-03 01:11:15,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 01:11:15,340 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-03 01:11:15,882 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:17,499 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:19,157 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:20,849 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:22,903 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:24,124 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:25,154 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:26,268 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:27,611 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:28,723 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:29,690 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:30,709 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:31,544 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:35,274 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:39,568 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:44,326 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:51,073 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:12:02,606 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:12:21,010 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:12:23,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490536572] [2020-12-03 01:12:23,841 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:12:23,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669378867] [2020-12-03 01:12:23,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-03 01:12:23,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:12:23,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-03 01:12:23,843 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-03 01:12:23,843 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:12:24,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:12:24,071 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-03 01:12:24,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:12:24 BoogieIcfgContainer [2020-12-03 01:12:24,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:12:24,073 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:12:24,073 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:12:24,073 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:12:24,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:00" (3/4) ... [2020-12-03 01:12:24,077 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 01:12:24,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:12:24,080 INFO L168 Benchmark]: Toolchain (without parser) took 84662.48 ms. Allocated memory was 46.1 MB in the beginning and 226.5 MB in the end (delta: 180.4 MB). Free memory was 22.4 MB in the beginning and 152.2 MB in the end (delta: -129.8 MB). Peak memory consumption was 52.9 MB. Max. memory is 16.1 GB. [2020-12-03 01:12:24,080 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 46.1 MB. Free memory was 24.0 MB in the beginning and 24.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:12:24,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.90 ms. Allocated memory was 46.1 MB in the beginning and 60.8 MB in the end (delta: 14.7 MB). Free memory was 22.2 MB in the beginning and 38.1 MB in the end (delta: -15.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-12-03 01:12:24,081 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.28 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 36.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:12:24,082 INFO L168 Benchmark]: Boogie Preprocessor took 27.07 ms. Allocated memory is still 60.8 MB. Free memory was 36.5 MB in the beginning and 35.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:12:24,082 INFO L168 Benchmark]: RCFGBuilder took 409.23 ms. Allocated memory is still 60.8 MB. Free memory was 35.3 MB in the beginning and 33.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-12-03 01:12:24,083 INFO L168 Benchmark]: TraceAbstraction took 83744.34 ms. Allocated memory was 60.8 MB in the beginning and 226.5 MB in the end (delta: 165.7 MB). Free memory was 33.5 MB in the beginning and 152.2 MB in the end (delta: -118.8 MB). Peak memory consumption was 127.7 MB. Max. memory is 16.1 GB. [2020-12-03 01:12:24,083 INFO L168 Benchmark]: Witness Printer took 4.98 ms. Allocated memory is still 226.5 MB. Free memory is still 152.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:12:24,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 46.1 MB. Free memory was 24.0 MB in the beginning and 24.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 417.90 ms. Allocated memory was 46.1 MB in the beginning and 60.8 MB in the end (delta: 14.7 MB). Free memory was 22.2 MB in the beginning and 38.1 MB in the end (delta: -15.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.28 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 36.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.07 ms. Allocated memory is still 60.8 MB. Free memory was 36.5 MB in the beginning and 35.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 409.23 ms. Allocated memory is still 60.8 MB. Free memory was 35.3 MB in the beginning and 33.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 83744.34 ms. Allocated memory was 60.8 MB in the beginning and 226.5 MB in the end (delta: 165.7 MB). Free memory was 33.5 MB in the beginning and 152.2 MB in the end (delta: -118.8 MB). Peak memory consumption was 127.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.98 ms. Allocated memory is still 226.5 MB. Free memory is still 152.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<20 [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 83.5s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 394 SDtfs, 783 SDslu, 796 SDs, 0 SdLazy, 632 SolverSat, 126 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred 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: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 94 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 30603 SizeOfPredicates, 44 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/59 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-03 01:12:26,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:12:26,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:12:26,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:12:26,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:12:26,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:12:26,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:12:26,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:12:26,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:12:26,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:12:26,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:12:26,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:12:26,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:12:26,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:12:26,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:12:26,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:12:26,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:12:26,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:12:26,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:12:26,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:12:26,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:12:26,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:12:26,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:12:26,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:12:26,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:12:26,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:12:26,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:12:26,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:12:26,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:12:26,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:12:26,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:12:26,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:12:26,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:12:26,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:12:26,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:12:26,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:12:26,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:12:26,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:12:26,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:12:26,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:12:26,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:12:26,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 01:12:26,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:12:26,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:12:26,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:12:26,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:12:26,937 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:12:26,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:12:26,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:12:26,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:12:26,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:12:26,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:12:26,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:12:26,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:12:26,939 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 01:12:26,939 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 01:12:26,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:12:26,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:12:26,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:12:26,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:12:26,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:12:26,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:12:26,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:12:26,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:12:26,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:12:26,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:12:26,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:12:26,941 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 01:12:26,942 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 01:12:26,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:12:26,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:12:26,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 01:12:26,942 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b1d947ee7d32af92c51ce8206d03b05796efe0 [2020-12-03 01:12:27,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:12:27,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:12:27,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:12:27,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:12:27,439 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:12:27,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2020-12-03 01:12:27,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d89e0c06/63da176fb00b47b18a332cdbbe2d7a5e/FLAG131fa9add [2020-12-03 01:12:28,216 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:12:28,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c [2020-12-03 01:12:28,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d89e0c06/63da176fb00b47b18a332cdbbe2d7a5e/FLAG131fa9add [2020-12-03 01:12:28,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d89e0c06/63da176fb00b47b18a332cdbbe2d7a5e [2020-12-03 01:12:28,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:12:28,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:12:28,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:12:28,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:12:28,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:12:28,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3f6cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28, skipping insertion in model container [2020-12-03 01:12:28,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:12:28,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:12:28,828 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2020-12-03 01:12:28,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:12:28,866 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:12:28,882 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound20.c[537,550] [2020-12-03 01:12:28,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:12:28,909 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:12:28,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28 WrapperNode [2020-12-03 01:12:28,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:12:28,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:12:28,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:12:28,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:12:28,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:12:28,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:12:28,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:12:28,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:12:28,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:28,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... [2020-12-03 01:12:29,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:12:29,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:12:29,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:12:29,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:12:29,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:12:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 01:12:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:12:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:12:29,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:12:29,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:12:29,626 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:12:29,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:12:29 BoogieIcfgContainer [2020-12-03 01:12:29,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:12:29,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:12:29,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:12:29,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:12:29,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:12:28" (1/3) ... [2020-12-03 01:12:29,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41277dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:12:29, skipping insertion in model container [2020-12-03 01:12:29,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:12:28" (2/3) ... [2020-12-03 01:12:29,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41277dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:12:29, skipping insertion in model container [2020-12-03 01:12:29,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:12:29" (3/3) ... [2020-12-03 01:12:29,638 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.c [2020-12-03 01:12:29,655 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:12:29,659 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:12:29,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:12:29,703 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:12:29,703 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:12:29,703 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:12:29,704 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:12:29,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:12:29,704 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:12:29,704 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:12:29,704 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:12:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-03 01:12:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:12:29,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:29,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:29,734 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-03 01:12:29,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:29,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125163284] [2020-12-03 01:12:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:29,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 01:12:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:29,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:12:29,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125163284] [2020-12-03 01:12:29,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:12:29,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:12:29,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543818606] [2020-12-03 01:12:30,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:12:30,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:12:30,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:12:30,029 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-03 01:12:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:30,074 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-03 01:12:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:12:30,076 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-03 01:12:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:30,086 INFO L225 Difference]: With dead ends: 79 [2020-12-03 01:12:30,086 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:12:30,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:12:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:12:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:12:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:12:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:12:30,138 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-03 01:12:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:30,139 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:12:30,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:12:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:12:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 01:12:30,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:30,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:30,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 01:12:30,347 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-03 01:12:30,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:30,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096184686] [2020-12-03 01:12:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:12:30,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:30,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:12:30,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096184686] [2020-12-03 01:12:30,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:12:30,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:12:30,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322790781] [2020-12-03 01:12:30,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:12:30,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:12:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:12:30,523 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:12:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:30,744 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:12:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:12:30,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-03 01:12:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:30,751 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:12:30,751 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:12:30,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:12:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:12:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:12:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:12:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:12:30,761 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-03 01:12:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:30,762 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:12:30,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:12:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:12:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:12:30,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:30,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:30,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 01:12:30,977 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-03 01:12:30,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:30,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793787022] [2020-12-03 01:12:30,981 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 [2020-12-03 01:12:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 01:12:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:31,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:12:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793787022] [2020-12-03 01:12:31,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:12:31,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 01:12:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281053501] [2020-12-03 01:12:31,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:12:31,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:12:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:12:31,108 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:12:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:31,140 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-03 01:12:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:12:31,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:12:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:31,142 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:12:31,143 INFO L226 Difference]: Without dead ends: 37 [2020-12-03 01:12:31,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:12:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-03 01:12:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-03 01:12:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 01:12:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-03 01:12:31,153 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-03 01:12:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:31,153 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-03 01:12:31,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:12:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-03 01:12:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 01:12:31,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:31,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:31,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 01:12:31,362 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-03 01:12:31,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:31,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912060566] [2020-12-03 01:12:31,366 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 [2020-12-03 01:12:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:12:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:31,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:12:31,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912060566] [2020-12-03 01:12:31,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:12:31,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:12:31,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440304855] [2020-12-03 01:12:31,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:12:31,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:12:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:12:31,493 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-03 01:12:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:31,710 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-03 01:12:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:12:31,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 01:12:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:31,713 INFO L225 Difference]: With dead ends: 56 [2020-12-03 01:12:31,714 INFO L226 Difference]: Without dead ends: 54 [2020-12-03 01:12:31,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:12:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-03 01:12:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-03 01:12:31,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:12:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-03 01:12:31,731 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-03 01:12:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:31,732 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-03 01:12:31,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:12:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-03 01:12:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 01:12:31,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:31,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:31,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 01:12:31,935 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-03 01:12:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:31,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110431181] [2020-12-03 01:12:31,937 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 [2020-12-03 01:12:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:32,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:12:32,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:32,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:12:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110431181] [2020-12-03 01:12:32,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:12:32,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:12:32,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110244955] [2020-12-03 01:12:32,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:12:32,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:32,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:12:32,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:12:32,104 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-03 01:12:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:32,417 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-03 01:12:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:12:32,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-03 01:12:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:32,424 INFO L225 Difference]: With dead ends: 81 [2020-12-03 01:12:32,424 INFO L226 Difference]: Without dead ends: 58 [2020-12-03 01:12:32,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:12:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-03 01:12:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-03 01:12:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 01:12:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-03 01:12:32,459 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-03 01:12:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:32,460 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-03 01:12:32,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:12:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-03 01:12:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 01:12:32,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:32,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:32,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-03 01:12:32,666 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-03 01:12:32,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:32,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342963713] [2020-12-03 01:12:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:32,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:12:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:32,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:12:32,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342963713] [2020-12-03 01:12:32,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:12:32,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:12:32,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312862778] [2020-12-03 01:12:32,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:12:32,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:32,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:12:32,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:12:32,877 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 4 states. [2020-12-03 01:12:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:33,102 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-12-03 01:12:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:12:33,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-03 01:12:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:33,113 INFO L225 Difference]: With dead ends: 68 [2020-12-03 01:12:33,114 INFO L226 Difference]: Without dead ends: 56 [2020-12-03 01:12:33,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:12:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-03 01:12:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-12-03 01:12:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 01:12:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-03 01:12:33,137 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2020-12-03 01:12:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:33,137 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-03 01:12:33,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:12:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-03 01:12:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:12:33,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:33,139 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:33,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-03 01:12:33,340 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:33,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1944686052, now seen corresponding path program 1 times [2020-12-03 01:12:33,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:33,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322341523] [2020-12-03 01:12:33,343 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 [2020-12-03 01:12:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:33,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:12:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:33,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:33,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322341523] [2020-12-03 01:12:33,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:12:33,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-03 01:12:33,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764978583] [2020-12-03 01:12:33,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:12:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:12:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:12:33,595 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 8 states. [2020-12-03 01:12:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:33,734 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-12-03 01:12:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 01:12:33,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:12:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:33,736 INFO L225 Difference]: With dead ends: 117 [2020-12-03 01:12:33,736 INFO L226 Difference]: Without dead ends: 89 [2020-12-03 01:12:33,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:12:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-03 01:12:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2020-12-03 01:12:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-03 01:12:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-12-03 01:12:33,748 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 20 [2020-12-03 01:12:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:33,748 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-12-03 01:12:33,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:12:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-12-03 01:12:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 01:12:33,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:33,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:33,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-03 01:12:33,967 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-03 01:12:33,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:33,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958851355] [2020-12-03 01:12:33,970 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 [2020-12-03 01:12:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:12:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:34,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:34,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958851355] [2020-12-03 01:12:34,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:12:34,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:12:34,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225004421] [2020-12-03 01:12:34,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:12:34,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:12:34,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:12:34,385 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 8 states. [2020-12-03 01:12:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:37,866 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2020-12-03 01:12:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-03 01:12:37,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-03 01:12:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:37,868 INFO L225 Difference]: With dead ends: 140 [2020-12-03 01:12:37,868 INFO L226 Difference]: Without dead ends: 126 [2020-12-03 01:12:37,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-03 01:12:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-03 01:12:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-12-03 01:12:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-03 01:12:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-12-03 01:12:37,884 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 20 [2020-12-03 01:12:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:37,884 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-12-03 01:12:37,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:12:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-12-03 01:12:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:12:37,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:37,886 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] [2020-12-03 01:12:38,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-03 01:12:38,094 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:38,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:38,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-03 01:12:38,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:38,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712345439] [2020-12-03 01:12:38,095 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 [2020-12-03 01:12:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:12:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:38,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:38,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712345439] [2020-12-03 01:12:38,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:12:38,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-03 01:12:38,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69232886] [2020-12-03 01:12:38,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 01:12:38,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 01:12:38,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-03 01:12:38,370 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 10 states. [2020-12-03 01:12:38,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:38,768 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-12-03 01:12:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 01:12:38,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-03 01:12:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:38,770 INFO L225 Difference]: With dead ends: 178 [2020-12-03 01:12:38,771 INFO L226 Difference]: Without dead ends: 168 [2020-12-03 01:12:38,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-12-03 01:12:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-03 01:12:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 139. [2020-12-03 01:12:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-03 01:12:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2020-12-03 01:12:38,800 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 27 [2020-12-03 01:12:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:38,800 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2020-12-03 01:12:38,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 01:12:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2020-12-03 01:12:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-03 01:12:38,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:38,802 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] [2020-12-03 01:12:39,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-03 01:12:39,016 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-03 01:12:39,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:39,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366458692] [2020-12-03 01:12:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:12:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:39,593 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:12:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:39,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:40,336 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-03 01:12:40,861 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:12:41,394 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 01:12:42,231 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-12-03 01:12:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:42,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366458692] [2020-12-03 01:12:42,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:12:42,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-03 01:12:42,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611739328] [2020-12-03 01:12:42,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 01:12:42,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 01:12:42,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:12:42,284 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand 14 states. [2020-12-03 01:12:43,747 WARN L197 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:12:45,182 WARN L197 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:12:46,247 WARN L197 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:12:49,823 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 01:12:50,894 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:12:51,659 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 01:12:52,784 WARN L197 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:12:53,500 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-03 01:12:57,572 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:12:58,094 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:13:01,943 WARN L197 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 01:13:03,022 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-03 01:13:05,628 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:13:10,736 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 01:13:20,306 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-03 01:13:21,852 WARN L197 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:13:22,546 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-03 01:13:23,902 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:13:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:24,874 INFO L93 Difference]: Finished difference Result 285 states and 346 transitions. [2020-12-03 01:13:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-03 01:13:24,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-12-03 01:13:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:24,881 INFO L225 Difference]: With dead ends: 285 [2020-12-03 01:13:24,881 INFO L226 Difference]: Without dead ends: 232 [2020-12-03 01:13:24,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2020-12-03 01:13:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-03 01:13:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 150. [2020-12-03 01:13:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-03 01:13:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2020-12-03 01:13:24,909 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 31 [2020-12-03 01:13:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:24,909 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2020-12-03 01:13:24,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 01:13:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2020-12-03 01:13:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 01:13:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:24,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:25,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-03 01:13:25,125 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -900022411, now seen corresponding path program 1 times [2020-12-03 01:13:25,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:13:25,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613476772] [2020-12-03 01:13:25,129 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 [2020-12-03 01:13:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 01:13:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:25,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:13:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:25,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:13:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:26,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613476772] [2020-12-03 01:13:26,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:13:26,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-03 01:13:26,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971741759] [2020-12-03 01:13:26,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 01:13:26,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:13:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 01:13:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:13:26,179 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand 12 states. [2020-12-03 01:13:26,921 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-03 01:13:27,314 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-03 01:13:27,664 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:13:28,559 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:13:31,600 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:13:31,912 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-03 01:13:32,221 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-03 01:13:32,924 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:13:33,513 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:13:33,790 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:13:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:34,417 INFO L93 Difference]: Finished difference Result 223 states and 274 transitions. [2020-12-03 01:13:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-03 01:13:34,423 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-12-03 01:13:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:34,424 INFO L225 Difference]: With dead ends: 223 [2020-12-03 01:13:34,425 INFO L226 Difference]: Without dead ends: 172 [2020-12-03 01:13:34,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-12-03 01:13:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-03 01:13:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2020-12-03 01:13:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-03 01:13:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 174 transitions. [2020-12-03 01:13:34,458 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 174 transitions. Word has length 33 [2020-12-03 01:13:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:34,458 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 174 transitions. [2020-12-03 01:13:34,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 01:13:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 174 transitions. [2020-12-03 01:13:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-03 01:13:34,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:34,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:34,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-03 01:13:34,679 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:34,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash 918142130, now seen corresponding path program 1 times [2020-12-03 01:13:34,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:13:34,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361588] [2020-12-03 01:13:34,680 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 [2020-12-03 01:13:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:34,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:13:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:35,215 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:13:35,478 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-03 01:13:35,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:13:37,106 WARN L197 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:13:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:37,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:13:38,171 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:13:38,171 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:13:39,662 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 01:13:39,683 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:13:39,683 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:13:48,828 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:13:48,836 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:13:48,837 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:13:52,133 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:13:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:52,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361588] [2020-12-03 01:13:52,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:13:52,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-12-03 01:13:52,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542870054] [2020-12-03 01:13:52,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-03 01:13:52,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:13:52,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-03 01:13:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=303, Unknown=4, NotChecked=0, Total=380 [2020-12-03 01:13:52,187 INFO L87 Difference]: Start difference. First operand 150 states and 174 transitions. Second operand 20 states. [2020-12-03 01:13:55,001 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2020-12-03 01:13:57,446 WARN L197 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-12-03 01:14:13,099 WARN L197 SmtUtils]: Spent 15.24 s on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-12-03 01:14:22,232 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-12-03 01:14:23,432 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:14:24,792 WARN L197 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-03 01:14:26,122 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:14:26,821 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:14:29,404 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-03 01:14:31,255 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:14:36,946 WARN L197 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:14:37,763 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:14:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:37,764 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2020-12-03 01:14:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-03 01:14:37,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-12-03 01:14:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:37,766 INFO L225 Difference]: With dead ends: 164 [2020-12-03 01:14:37,766 INFO L226 Difference]: Without dead ends: 147 [2020-12-03 01:14:37,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=302, Invalid=1026, Unknown=4, NotChecked=0, Total=1332 [2020-12-03 01:14:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-03 01:14:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2020-12-03 01:14:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-03 01:14:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2020-12-03 01:14:37,789 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 36 [2020-12-03 01:14:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:37,789 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2020-12-03 01:14:37,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-03 01:14:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2020-12-03 01:14:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-03 01:14:37,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:37,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:38,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-03 01:14:38,007 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:38,007 INFO L82 PathProgramCache]: Analyzing trace with hash -68445756, now seen corresponding path program 2 times [2020-12-03 01:14:38,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:14:38,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885062320] [2020-12-03 01:14:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-03 01:14:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:14:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:14:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:14:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:14:38,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:14:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:14:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885062320] [2020-12-03 01:14:38,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:14:38,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:14:38,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10839740] [2020-12-03 01:14:38,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:14:38,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:14:38,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:14:38,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:14:38,357 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand 8 states. [2020-12-03 01:14:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:14:38,612 INFO L93 Difference]: Finished difference Result 237 states and 278 transitions. [2020-12-03 01:14:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:14:38,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-03 01:14:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:14:38,615 INFO L225 Difference]: With dead ends: 237 [2020-12-03 01:14:38,615 INFO L226 Difference]: Without dead ends: 200 [2020-12-03 01:14:38,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-03 01:14:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-03 01:14:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 162. [2020-12-03 01:14:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-03 01:14:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-12-03 01:14:38,641 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 44 [2020-12-03 01:14:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:14:38,642 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-12-03 01:14:38,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:14:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-12-03 01:14:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-03 01:14:38,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:14:38,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:14:38,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-03 01:14:38,847 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:14:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:14:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1302416352, now seen corresponding path program 2 times [2020-12-03 01:14:38,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:14:38,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855683224] [2020-12-03 01:14:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-03 01:14:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:14:39,407 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:14:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:14:39,685 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:14:39,819 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-03 01:14:39,820 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:14:40,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-03 01:14:40,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:14:40 BoogieIcfgContainer [2020-12-03 01:14:40,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:14:40,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:14:40,112 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:14:40,112 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:14:40,114 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:12:29" (3/4) ... [2020-12-03 01:14:40,117 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 01:14:40,239 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-03 01:14:40,239 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:14:40,241 INFO L168 Benchmark]: Toolchain (without parser) took 131662.75 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 15.9 MB in the beginning and 23.9 MB in the end (delta: -8.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-12-03 01:14:40,243 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 37.7 MB. Free memory was 23.5 MB in the beginning and 23.4 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:14:40,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.93 ms. Allocated memory is still 37.7 MB. Free memory was 15.7 MB in the beginning and 14.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-12-03 01:14:40,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.18 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 14.5 MB in the beginning and 31.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-12-03 01:14:40,244 INFO L168 Benchmark]: Boogie Preprocessor took 34.27 ms. Allocated memory is still 46.1 MB. Free memory was 31.1 MB in the beginning and 29.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:14:40,245 INFO L168 Benchmark]: RCFGBuilder took 625.53 ms. Allocated memory is still 46.1 MB. Free memory was 29.7 MB in the beginning and 21.9 MB in the end (delta: 7.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-12-03 01:14:40,245 INFO L168 Benchmark]: TraceAbstraction took 130479.96 ms. Allocated memory is still 46.1 MB. Free memory was 21.5 MB in the beginning and 13.3 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 01:14:40,246 INFO L168 Benchmark]: Witness Printer took 129.04 ms. Allocated memory is still 46.1 MB. Free memory was 13.3 MB in the beginning and 23.9 MB in the end (delta: -10.6 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2020-12-03 01:14:40,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 37.7 MB. Free memory was 23.5 MB in the beginning and 23.4 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.93 ms. Allocated memory is still 37.7 MB. Free memory was 15.7 MB in the beginning and 14.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.18 ms. Allocated memory was 37.7 MB in the beginning and 46.1 MB in the end (delta: 8.4 MB). Free memory was 14.5 MB in the beginning and 31.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.27 ms. Allocated memory is still 46.1 MB. Free memory was 31.1 MB in the beginning and 29.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 625.53 ms. Allocated memory is still 46.1 MB. Free memory was 29.7 MB in the beginning and 21.9 MB in the end (delta: 7.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 130479.96 ms. Allocated memory is still 46.1 MB. Free memory was 21.5 MB in the beginning and 13.3 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Witness Printer took 129.04 ms. Allocated memory is still 46.1 MB. Free memory was 13.3 MB in the beginning and 23.9 MB in the end (delta: -10.6 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) VAL [counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [counter=0] [L35] EXPR counter++ VAL [counter=1] [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=1] [L35] EXPR counter++ VAL [counter=2] [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=2] [L35] EXPR counter++ VAL [counter=3] [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND TRUE !(r >= d) VAL [counter=3] [L45] EXPR counter++ VAL [counter=4] [L45] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [counter=4] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [counter=4] [L45] EXPR counter++ VAL [counter=5] [L45] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [counter=5] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [counter=5] [L45] EXPR counter++ VAL [counter=6] [L45] COND TRUE counter++<20 [L15] COND TRUE !(cond) VAL [counter=6] [L17] reach_error() VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 130.3s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 101.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 452 SDtfs, 892 SDslu, 1336 SDs, 0 SdLazy, 1037 SolverSat, 416 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 43.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 77.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=13, 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, 13 MinimizatonAttempts, 309 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 22.5s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 466 ConstructedInterpolants, 26 QuantifiedInterpolants, 104034 SizeOfPredicates, 57 NumberOfNonLiveVariables, 796 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 22/170 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...