./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id2_b5_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/recursive-simple/id2_b5_o10.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 aea35f6fe28f2a249b678370b7d0543ee4b994af ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 09:00:31,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 09:00:31,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 09:00:31,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 09:00:31,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 09:00:31,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 09:00:31,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 09:00:31,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 09:00:31,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 09:00:31,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 09:00:31,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 09:00:31,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 09:00:31,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 09:00:31,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 09:00:31,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 09:00:31,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 09:00:31,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 09:00:31,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 09:00:31,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 09:00:31,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 09:00:31,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 09:00:31,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 09:00:31,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 09:00:31,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 09:00:31,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 09:00:31,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 09:00:31,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 09:00:31,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 09:00:31,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 09:00:31,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 09:00:31,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 09:00:31,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 09:00:31,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 09:00:31,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 09:00:31,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 09:00:31,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 09:00:31,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 09:00:31,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 09:00:31,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 09:00:31,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 09:00:31,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 09:00:31,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 09:00:31,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 09:00:31,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 09:00:31,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 09:00:31,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 09:00:31,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 09:00:31,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 09:00:31,897 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 09:00:31,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 09:00:31,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 09:00:31,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 09:00:31,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 09:00:31,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 09:00:31,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 09:00:31,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 09:00:31,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 09:00:31,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 09:00:31,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 09:00:31,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 09:00:31,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 09:00:31,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 09:00:31,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 09:00:31,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 09:00:31,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:00:31,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 09:00:31,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 09:00:31,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 09:00:31,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 09:00:31,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 09:00:31,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 09:00:31,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 09:00:31,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aea35f6fe28f2a249b678370b7d0543ee4b994af [2021-08-26 09:00:32,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 09:00:32,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 09:00:32,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 09:00:32,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 09:00:32,253 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 09:00:32,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2021-08-26 09:00:32,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f19235a/977ba4d6813349d2ae205f9e72efe3fd/FLAG466f3efe7 [2021-08-26 09:00:32,748 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 09:00:32,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2021-08-26 09:00:32,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f19235a/977ba4d6813349d2ae205f9e72efe3fd/FLAG466f3efe7 [2021-08-26 09:00:32,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f19235a/977ba4d6813349d2ae205f9e72efe3fd [2021-08-26 09:00:32,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 09:00:32,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 09:00:32,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 09:00:32,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 09:00:32,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 09:00:32,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:00:32" (1/1) ... [2021-08-26 09:00:32,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cae008d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:32, skipping insertion in model container [2021-08-26 09:00:32,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:00:32" (1/1) ... [2021-08-26 09:00:32,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 09:00:32,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 09:00:32,976 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b5_o10.c[773,786] [2021-08-26 09:00:32,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:00:32,985 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 09:00:33,002 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b5_o10.c[773,786] [2021-08-26 09:00:33,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:00:33,015 INFO L208 MainTranslator]: Completed translation [2021-08-26 09:00:33,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33 WrapperNode [2021-08-26 09:00:33,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 09:00:33,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 09:00:33,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 09:00:33,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 09:00:33,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 09:00:33,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 09:00:33,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 09:00:33,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 09:00:33,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 09:00:33,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 09:00:33,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 09:00:33,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 09:00:33,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (1/1) ... [2021-08-26 09:00:33,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:00:33,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:33,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 09:00:33,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 09:00:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 09:00:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 09:00:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-08-26 09:00:33,156 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-08-26 09:00:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 09:00:33,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 09:00:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-08-26 09:00:33,156 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-08-26 09:00:33,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 09:00:33,422 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-26 09:00:33,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:33 BoogieIcfgContainer [2021-08-26 09:00:33,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 09:00:33,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 09:00:33,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 09:00:33,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 09:00:33,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:00:32" (1/3) ... [2021-08-26 09:00:33,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f2a879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:00:33, skipping insertion in model container [2021-08-26 09:00:33,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:33" (2/3) ... [2021-08-26 09:00:33,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f2a879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:00:33, skipping insertion in model container [2021-08-26 09:00:33,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:33" (3/3) ... [2021-08-26 09:00:33,451 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2021-08-26 09:00:33,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 09:00:33,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 09:00:33,526 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 09:00:33,535 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 09:00:33,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 09:00:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 09:00:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 09:00:33,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:33,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:33,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash 794002500, now seen corresponding path program 1 times [2021-08-26 09:00:33,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:33,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237123783] [2021-08-26 09:00:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:33,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:00:33,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:33,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237123783] [2021-08-26 09:00:33,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237123783] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:33,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:33,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 09:00:33,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301015073] [2021-08-26 09:00:33,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:00:33,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:00:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:33,856 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:00:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:33,893 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-08-26 09:00:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-26 09:00:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:33,900 INFO L225 Difference]: With dead ends: 36 [2021-08-26 09:00:33,901 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 09:00:33,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 09:00:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-26 09:00:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-26 09:00:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-26 09:00:33,931 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2021-08-26 09:00:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:33,932 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-26 09:00:33,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:00:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-26 09:00:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 09:00:33,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:33,934 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:33,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 09:00:33,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1040166181, now seen corresponding path program 1 times [2021-08-26 09:00:33,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:33,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15610397] [2021-08-26 09:00:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:33,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:00:34,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:34,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15610397] [2021-08-26 09:00:34,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15610397] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:34,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:34,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 09:00:34,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239997001] [2021-08-26 09:00:34,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:00:34,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:00:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:34,184 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-26 09:00:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:34,214 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-08-26 09:00:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-08-26 09:00:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:34,217 INFO L225 Difference]: With dead ends: 41 [2021-08-26 09:00:34,217 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 09:00:34,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 09:00:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-26 09:00:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 09:00:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-08-26 09:00:34,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2021-08-26 09:00:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:34,230 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-08-26 09:00:34,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-26 09:00:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-08-26 09:00:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 09:00:34,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:34,232 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:34,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 09:00:34,233 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1068795332, now seen corresponding path program 1 times [2021-08-26 09:00:34,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:34,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220710448] [2021-08-26 09:00:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:34,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:00:34,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:34,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220710448] [2021-08-26 09:00:34,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220710448] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:34,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:34,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 09:00:34,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9075450] [2021-08-26 09:00:34,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:00:34,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:00:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:00:34,520 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-26 09:00:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:34,613 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-08-26 09:00:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:00:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-08-26 09:00:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:34,617 INFO L225 Difference]: With dead ends: 33 [2021-08-26 09:00:34,618 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 09:00:34,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-26 09:00:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 09:00:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-26 09:00:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 09:00:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-08-26 09:00:34,627 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2021-08-26 09:00:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:34,628 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-08-26 09:00:34,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-26 09:00:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-08-26 09:00:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 09:00:34,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:34,629 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:34,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 09:00:34,629 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1632008158, now seen corresponding path program 1 times [2021-08-26 09:00:34,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:34,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356660800] [2021-08-26 09:00:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:34,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:34,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:34,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356660800] [2021-08-26 09:00:34,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356660800] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:34,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:34,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 09:00:34,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724284215] [2021-08-26 09:00:34,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:00:34,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:00:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:34,786 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:34,817 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-08-26 09:00:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-08-26 09:00:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:34,820 INFO L225 Difference]: With dead ends: 45 [2021-08-26 09:00:34,820 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 09:00:34,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 09:00:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-08-26 09:00:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-26 09:00:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-26 09:00:34,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2021-08-26 09:00:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:34,837 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-26 09:00:34,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-26 09:00:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 09:00:34,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:34,839 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:34,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 09:00:34,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1435494653, now seen corresponding path program 1 times [2021-08-26 09:00:34,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:34,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873567607] [2021-08-26 09:00:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:34,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:34,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:35,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:35,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873567607] [2021-08-26 09:00:35,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873567607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:35,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:35,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 09:00:35,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634631222] [2021-08-26 09:00:35,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:00:35,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:35,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:00:35,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:00:35,107 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:35,176 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-08-26 09:00:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:00:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-08-26 09:00:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:35,179 INFO L225 Difference]: With dead ends: 49 [2021-08-26 09:00:35,179 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 09:00:35,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-26 09:00:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 09:00:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-08-26 09:00:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-26 09:00:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-08-26 09:00:35,193 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2021-08-26 09:00:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:35,193 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-08-26 09:00:35,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-08-26 09:00:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 09:00:35,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:35,195 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:35,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 09:00:35,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1464123804, now seen corresponding path program 1 times [2021-08-26 09:00:35,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:35,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863872418] [2021-08-26 09:00:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:35,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:35,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:35,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863872418] [2021-08-26 09:00:35,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863872418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:35,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336250569] [2021-08-26 09:00:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:35,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:35,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:35,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 09:00:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 09:00:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:35,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336250569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:35,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:35,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-26 09:00:35,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074145559] [2021-08-26 09:00:35,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 09:00:35,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:35,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 09:00:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-08-26 09:00:35,752 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:35,834 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-08-26 09:00:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 09:00:35,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-08-26 09:00:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:35,837 INFO L225 Difference]: With dead ends: 41 [2021-08-26 09:00:35,837 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 09:00:35,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:00:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 09:00:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-08-26 09:00:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-26 09:00:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-26 09:00:35,848 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2021-08-26 09:00:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-26 09:00:35,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-26 09:00:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 09:00:35,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:35,854 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:35,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 09:00:36,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 09:00:36,055 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash 937223766, now seen corresponding path program 1 times [2021-08-26 09:00:36,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:36,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353847494] [2021-08-26 09:00:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:36,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 09:00:36,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:36,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353847494] [2021-08-26 09:00:36,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353847494] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:36,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:36,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 09:00:36,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115168985] [2021-08-26 09:00:36,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:00:36,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:00:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:00:36,248 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-26 09:00:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:36,289 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-08-26 09:00:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:00:36,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-08-26 09:00:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:36,291 INFO L225 Difference]: With dead ends: 53 [2021-08-26 09:00:36,291 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 09:00:36,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-26 09:00:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 09:00:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-08-26 09:00:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-26 09:00:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-08-26 09:00:36,295 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2021-08-26 09:00:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:36,295 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-08-26 09:00:36,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-26 09:00:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-08-26 09:00:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 09:00:36,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:36,296 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:36,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-26 09:00:36,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash 740710261, now seen corresponding path program 1 times [2021-08-26 09:00:36,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:36,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063175010] [2021-08-26 09:00:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:36,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 09:00:36,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:36,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063175010] [2021-08-26 09:00:36,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063175010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:36,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978388283] [2021-08-26 09:00:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:36,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:36,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:36,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:36,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 09:00:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 09:00:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 09:00:36,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978388283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:36,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 09:00:36,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-08-26 09:00:36,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243745583] [2021-08-26 09:00:36,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:00:36,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:00:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:00:36,681 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:36,692 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-08-26 09:00:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-08-26 09:00:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:36,693 INFO L225 Difference]: With dead ends: 45 [2021-08-26 09:00:36,693 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 09:00:36,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:00:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 09:00:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-08-26 09:00:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-26 09:00:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-08-26 09:00:36,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2021-08-26 09:00:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:36,698 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-08-26 09:00:36,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-08-26 09:00:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 09:00:36,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:36,699 INFO L512 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] [2021-08-26 09:00:36,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:36,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-26 09:00:36,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:36,923 INFO L82 PathProgramCache]: Analyzing trace with hash 769339412, now seen corresponding path program 1 times [2021-08-26 09:00:36,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:36,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901369873] [2021-08-26 09:00:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:36,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:36,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:37,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:37,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 09:00:37,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:37,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901369873] [2021-08-26 09:00:37,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901369873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:37,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149811150] [2021-08-26 09:00:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:37,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:37,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:37,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 09:00:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 09:00:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 09:00:37,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149811150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:37,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:37,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-26 09:00:37,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589960114] [2021-08-26 09:00:37,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 09:00:37,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 09:00:37,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-26 09:00:37,666 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-26 09:00:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:37,803 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-08-26 09:00:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 09:00:37,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-08-26 09:00:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:37,805 INFO L225 Difference]: With dead ends: 61 [2021-08-26 09:00:37,805 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 09:00:37,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-08-26 09:00:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 09:00:37,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-08-26 09:00:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-26 09:00:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-08-26 09:00:37,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2021-08-26 09:00:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:37,810 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-08-26 09:00:37,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-26 09:00:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-08-26 09:00:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 09:00:37,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:37,811 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:37,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:38,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:38,024 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1806151381, now seen corresponding path program 1 times [2021-08-26 09:00:38,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:38,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107166164] [2021-08-26 09:00:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:38,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:38,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:38,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:38,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:38,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-26 09:00:38,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:38,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107166164] [2021-08-26 09:00:38,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107166164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:38,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919436694] [2021-08-26 09:00:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:38,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:38,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:38,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:38,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 09:00:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 09:00:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-26 09:00:38,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919436694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:38,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 09:00:38,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-08-26 09:00:38,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9187988] [2021-08-26 09:00:38,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:00:38,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:00:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-08-26 09:00:38,710 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-26 09:00:38,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:38,739 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-26 09:00:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:38,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-08-26 09:00:38,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:38,740 INFO L225 Difference]: With dead ends: 55 [2021-08-26 09:00:38,740 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 09:00:38,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-08-26 09:00:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 09:00:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-08-26 09:00:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-26 09:00:38,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-08-26 09:00:38,744 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 38 [2021-08-26 09:00:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:38,744 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-08-26 09:00:38,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-26 09:00:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-08-26 09:00:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 09:00:38,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:38,745 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:38,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:38,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:38,946 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1609637876, now seen corresponding path program 2 times [2021-08-26 09:00:38,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:38,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997946677] [2021-08-26 09:00:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:38,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:39,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:39,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:39,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:39,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-26 09:00:39,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:39,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997946677] [2021-08-26 09:00:39,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997946677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:39,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923063650] [2021-08-26 09:00:39,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:00:39,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:39,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:39,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:39,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 09:00:39,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 09:00:39,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 09:00:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-26 09:00:39,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923063650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:39,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:39,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-26 09:00:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179067582] [2021-08-26 09:00:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 09:00:39,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 09:00:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-26 09:00:39,717 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-08-26 09:00:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:39,891 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-08-26 09:00:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 09:00:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2021-08-26 09:00:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:39,893 INFO L225 Difference]: With dead ends: 77 [2021-08-26 09:00:39,893 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 09:00:39,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-08-26 09:00:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 09:00:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2021-08-26 09:00:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-26 09:00:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-08-26 09:00:39,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 38 [2021-08-26 09:00:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:39,898 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-08-26 09:00:39,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-08-26 09:00:39,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-08-26 09:00:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-26 09:00:39,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:39,899 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:39,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:40,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 09:00:40,121 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1159827100, now seen corresponding path program 2 times [2021-08-26 09:00:40,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:40,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763649580] [2021-08-26 09:00:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:40,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 09:00:40,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:40,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763649580] [2021-08-26 09:00:40,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763649580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:40,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789543274] [2021-08-26 09:00:40,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:00:40,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:40,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:40,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 09:00:40,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 09:00:40,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 09:00:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-08-26 09:00:40,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789543274] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:40,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 09:00:40,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [20] total 23 [2021-08-26 09:00:40,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153875007] [2021-08-26 09:00:40,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:00:40,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:00:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-08-26 09:00:40,868 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:40,878 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-08-26 09:00:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-08-26 09:00:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:40,879 INFO L225 Difference]: With dead ends: 43 [2021-08-26 09:00:40,879 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 09:00:40,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-08-26 09:00:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 09:00:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 09:00:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 09:00:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 09:00:40,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-08-26 09:00:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:40,882 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 09:00:40,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-26 09:00:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 09:00:40,882 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 09:00:40,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:00:40,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:41,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:41,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 09:00:41,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:00:41,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:00:41,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:00:41,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:00:41,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:00:41,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:00:41,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:00:41,114 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-08-26 09:00:41,115 INFO L857 garLoopResultBuilder]: For program point L18-1(line 18) no Hoare annotation was computed. [2021-08-26 09:00:41,115 INFO L857 garLoopResultBuilder]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2021-08-26 09:00:41,115 INFO L860 garLoopResultBuilder]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2021-08-26 09:00:41,115 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-26 09:00:41,115 INFO L857 garLoopResultBuilder]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2021-08-26 09:00:41,115 INFO L860 garLoopResultBuilder]: At program point L18(line 18) the Hoare annotation is: true [2021-08-26 09:00:41,116 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 09:00:41,116 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 09:00:41,116 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 09:00:41,116 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 09:00:41,116 INFO L857 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2021-08-26 09:00:41,116 INFO L857 garLoopResultBuilder]: For program point L26(lines 26 28) no Hoare annotation was computed. [2021-08-26 09:00:41,116 INFO L860 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2021-08-26 09:00:41,116 INFO L857 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-08-26 09:00:41,117 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2021-08-26 09:00:41,117 INFO L857 garLoopResultBuilder]: For program point L23(lines 23 29) no Hoare annotation was computed. [2021-08-26 09:00:41,117 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2021-08-26 09:00:41,117 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-08-26 09:00:41,117 INFO L860 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: true [2021-08-26 09:00:41,117 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2021-08-26 09:00:41,117 INFO L857 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-08-26 09:00:41,118 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-08-26 09:00:41,118 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2021-08-26 09:00:41,121 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 09:00:41,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 09:00:41 BoogieIcfgContainer [2021-08-26 09:00:41,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 09:00:41,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 09:00:41,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 09:00:41,125 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 09:00:41,125 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:33" (3/4) ... [2021-08-26 09:00:41,128 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 09:00:41,133 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2021-08-26 09:00:41,134 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-08-26 09:00:41,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 09:00:41,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 09:00:41,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 09:00:41,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 09:00:41,161 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 09:00:41,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 09:00:41,163 INFO L168 Benchmark]: Toolchain (without parser) took 8385.37 ms. Allocated memory was 52.4 MB in the beginning and 144.7 MB in the end (delta: 92.3 MB). Free memory was 29.5 MB in the beginning and 72.5 MB in the end (delta: -43.0 MB). Peak memory consumption was 50.0 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:41,163 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 52.4 MB. Free memory was 34.3 MB in the beginning and 34.2 MB in the end (delta: 41.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:00:41,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.05 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 33.3 MB in the end (delta: -4.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:41,164 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.75 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 31.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:41,164 INFO L168 Benchmark]: Boogie Preprocessor took 27.11 ms. Allocated memory is still 52.4 MB. Free memory was 31.9 MB in the beginning and 30.9 MB in the end (delta: 984.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:41,164 INFO L168 Benchmark]: RCFGBuilder took 353.69 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 30.9 MB in the beginning and 44.0 MB in the end (delta: -13.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:41,165 INFO L168 Benchmark]: TraceAbstraction took 7688.37 ms. Allocated memory was 67.1 MB in the beginning and 144.7 MB in the end (delta: 77.6 MB). Free memory was 43.6 MB in the beginning and 75.6 MB in the end (delta: -32.1 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:41,165 INFO L168 Benchmark]: Witness Printer took 37.04 ms. Allocated memory is still 144.7 MB. Free memory was 75.6 MB in the beginning and 72.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:41,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 52.4 MB. Free memory was 34.3 MB in the beginning and 34.2 MB in the end (delta: 41.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.05 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 33.3 MB in the end (delta: -4.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.75 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 31.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.11 ms. Allocated memory is still 52.4 MB. Free memory was 31.9 MB in the beginning and 30.9 MB in the end (delta: 984.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 353.69 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 30.9 MB in the beginning and 44.0 MB in the end (delta: -13.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7688.37 ms. Allocated memory was 67.1 MB in the beginning and 144.7 MB in the end (delta: 77.6 MB). Free memory was 43.6 MB in the beginning and 75.6 MB in the end (delta: -32.1 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. * Witness Printer took 37.04 ms. Allocated memory is still 144.7 MB. Free memory was 75.6 MB in the beginning and 72.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 27]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7598.2ms, OverallIterations: 12, TraceHistogramMax: 3, EmptinessCheckTime: 20.9ms, AutomataDifference: 810.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 14.7ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 316 SDtfs, 37 SDslu, 1918 SDs, 0 SdLazy, 524 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 351.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 429 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1662.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=11, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 95.4ms AutomataMinimizationTime, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 6.0ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 70.3ms SsaConstructionTime, 261.3ms SatisfiabilityAnalysisTime, 4268.7ms InterpolantComputationTime, 537 NumberOfCodeBlocks, 509 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 519 ConstructedInterpolants, 0 QuantifiedInterpolants, 1675 SizeOfPredicates, 16 NumberOfNonLiveVariables, 561 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 163/231 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-26 09:00:41,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...