./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/bitvector/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:42:26,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:42:26,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:42:26,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:42:26,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:42:26,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:42:26,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:42:26,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:42:26,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:42:26,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:42:26,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:42:26,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:42:26,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:42:26,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:42:26,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:42:26,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:42:26,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:42:26,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:42:26,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:42:26,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:42:26,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:42:26,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:42:26,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:42:26,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:42:26,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:42:26,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:42:26,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:42:26,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:42:26,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:42:26,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:42:26,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:42:26,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:42:26,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:42:26,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:42:26,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:42:26,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:42:26,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:42:26,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:42:26,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:42:26,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:42:26,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:42:26,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:42:26,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:42:26,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:42:26,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:42:26,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:42:26,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:42:26,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:42:26,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:42:26,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:42:26,954 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:42:26,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:42:26,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:42:26,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:42:26,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:42:26,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:42:26,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:42:26,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:42:26,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:42:26,956 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:42:26,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:42:26,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:42:26,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:42:26,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:42:26,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:42:26,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:42:26,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:42:26,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:42:26,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:42:26,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:42:26,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:42:26,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:42:26,958 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:42:26,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:42:26,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:42:26,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:42:26,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2021-12-14 11:42:27,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:42:27,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:42:27,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:42:27,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:42:27,161 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:42:27,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-12-14 11:42:27,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869dbf7b7/f124c1ab4ef44040ba24d32c6bc956cd/FLAG6b0aacf0d [2021-12-14 11:42:27,568 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:42:27,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-12-14 11:42:27,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869dbf7b7/f124c1ab4ef44040ba24d32c6bc956cd/FLAG6b0aacf0d [2021-12-14 11:42:27,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869dbf7b7/f124c1ab4ef44040ba24d32c6bc956cd [2021-12-14 11:42:27,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:42:27,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:42:27,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:42:27,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:42:27,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:42:27,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee68c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27, skipping insertion in model container [2021-12-14 11:42:27,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:42:27,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:42:27,720 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2021-12-14 11:42:27,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:42:27,769 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:42:27,777 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2021-12-14 11:42:27,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:42:27,807 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:42:27,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27 WrapperNode [2021-12-14 11:42:27,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:42:27,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:42:27,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:42:27,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:42:27,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,836 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2021-12-14 11:42:27,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:42:27,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:42:27,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:42:27,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:42:27,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:42:27,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:42:27,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:42:27,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:42:27,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (1/1) ... [2021-12-14 11:42:27,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:42:27,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:27,887 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) [2021-12-14 11:42:27,896 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 [2021-12-14 11:42:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:42:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:42:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-14 11:42:27,914 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-14 11:42:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:42:27,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:42:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 11:42:27,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 11:42:27,955 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:42:27,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:42:28,078 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:42:28,082 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:42:28,082 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 11:42:28,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:42:28 BoogieIcfgContainer [2021-12-14 11:42:28,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:42:28,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:42:28,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:42:28,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:42:28,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:42:27" (1/3) ... [2021-12-14 11:42:28,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23104009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:42:28, skipping insertion in model container [2021-12-14 11:42:28,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:27" (2/3) ... [2021-12-14 11:42:28,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23104009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:42:28, skipping insertion in model container [2021-12-14 11:42:28,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:42:28" (3/3) ... [2021-12-14 11:42:28,089 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2021-12-14 11:42:28,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:42:28,092 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:42:28,125 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:42:28,130 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-14 11:42:28,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:42:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 11:42:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 11:42:28,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:28,147 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:28,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:28,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:28,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1696138713, now seen corresponding path program 1 times [2021-12-14 11:42:28,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:28,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118217274] [2021-12-14 11:42:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:28,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 11:42:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 11:42:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 11:42:28,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:28,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118217274] [2021-12-14 11:42:28,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118217274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:42:28,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:42:28,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:42:28,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037244979] [2021-12-14 11:42:28,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:42:28,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:42:28,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:42:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:42:28,461 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:28,505 INFO L93 Difference]: Finished difference Result 104 states and 158 transitions. [2021-12-14 11:42:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:42:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2021-12-14 11:42:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:28,517 INFO L225 Difference]: With dead ends: 104 [2021-12-14 11:42:28,517 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 11:42:28,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:42:28,524 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:28,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 11:42:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-14 11:42:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 11:42:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2021-12-14 11:42:28,552 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 41 [2021-12-14 11:42:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:28,554 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2021-12-14 11:42:28,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2021-12-14 11:42:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 11:42:28,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:28,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:28,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:42:28,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1289248129, now seen corresponding path program 1 times [2021-12-14 11:42:28,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:28,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526442810] [2021-12-14 11:42:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:28,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 11:42:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 11:42:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 11:42:28,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:28,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526442810] [2021-12-14 11:42:28,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526442810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:42:28,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:42:28,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:42:28,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126603600] [2021-12-14 11:42:28,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:42:28,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:42:28,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:42:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:42:28,644 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:28,667 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2021-12-14 11:42:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:42:28,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-14 11:42:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:28,670 INFO L225 Difference]: With dead ends: 55 [2021-12-14 11:42:28,670 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 11:42:28,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:42:28,672 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:28,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 11:42:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-14 11:42:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 11:42:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-12-14 11:42:28,680 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 43 [2021-12-14 11:42:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-12-14 11:42:28,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-12-14 11:42:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 11:42:28,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:28,681 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:28,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:42:28,682 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2098594755, now seen corresponding path program 1 times [2021-12-14 11:42:28,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:28,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939735368] [2021-12-14 11:42:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:28,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 11:42:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 11:42:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:28,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939735368] [2021-12-14 11:42:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939735368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433726163] [2021-12-14 11:42:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:28,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:28,802 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) [2021-12-14 11:42:28,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:42:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:28,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 11:42:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:42:29,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 11:42:29,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433726163] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:29,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:42:29,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 8] total 14 [2021-12-14 11:42:29,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170692087] [2021-12-14 11:42:29,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:42:29,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:42:29,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:42:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:42:29,202 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:29,234 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2021-12-14 11:42:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:42:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-14 11:42:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:29,236 INFO L225 Difference]: With dead ends: 82 [2021-12-14 11:42:29,236 INFO L226 Difference]: Without dead ends: 61 [2021-12-14 11:42:29,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-14 11:42:29,237 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:29,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 282 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-14 11:42:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2021-12-14 11:42:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 11:42:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2021-12-14 11:42:29,244 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 43 [2021-12-14 11:42:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:29,244 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2021-12-14 11:42:29,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2021-12-14 11:42:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 11:42:29,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:29,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:29,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 11:42:29,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:29,459 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1609566527, now seen corresponding path program 1 times [2021-12-14 11:42:29,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:29,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543926561] [2021-12-14 11:42:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:29,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:29,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 11:42:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:29,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 11:42:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:29,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:29,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543926561] [2021-12-14 11:42:29,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543926561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570775219] [2021-12-14 11:42:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:29,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:29,511 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) [2021-12-14 11:42:29,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:42:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 11:42:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:42:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 11:42:29,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570775219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:42:29,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:42:29,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 6] total 14 [2021-12-14 11:42:29,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850815834] [2021-12-14 11:42:29,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:42:29,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:42:29,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:42:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:42:29,770 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 11:42:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:29,959 INFO L93 Difference]: Finished difference Result 144 states and 210 transitions. [2021-12-14 11:42:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 11:42:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2021-12-14 11:42:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:29,963 INFO L225 Difference]: With dead ends: 144 [2021-12-14 11:42:29,963 INFO L226 Difference]: Without dead ends: 96 [2021-12-14 11:42:29,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-12-14 11:42:29,964 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 58 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:29,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 450 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:42:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-14 11:42:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-12-14 11:42:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 69 states have internal predecessors, (92), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 113 transitions. [2021-12-14 11:42:29,976 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 113 transitions. Word has length 43 [2021-12-14 11:42:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:29,976 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 113 transitions. [2021-12-14 11:42:29,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-14 11:42:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 113 transitions. [2021-12-14 11:42:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 11:42:29,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:29,979 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:29,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 11:42:30,199 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,SelfDestructingSolverStorable3 [2021-12-14 11:42:30,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1478276807, now seen corresponding path program 1 times [2021-12-14 11:42:30,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:30,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557990911] [2021-12-14 11:42:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:30,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 11:42:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 11:42:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:30,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557990911] [2021-12-14 11:42:30,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557990911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377771] [2021-12-14 11:42:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:30,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:30,234 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) [2021-12-14 11:42:30,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:42:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:42:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:30,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:42:30,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:42:30,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:42:30,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-14 11:42:30,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612718714] [2021-12-14 11:42:30,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:42:30,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:42:30,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:42:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:42:30,354 INFO L87 Difference]: Start difference. First operand 81 states and 113 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 11:42:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:30,380 INFO L93 Difference]: Finished difference Result 160 states and 225 transitions. [2021-12-14 11:42:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:42:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-12-14 11:42:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:30,382 INFO L225 Difference]: With dead ends: 160 [2021-12-14 11:42:30,382 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 11:42:30,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:42:30,385 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:30,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 11:42:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-14 11:42:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 74 states have internal predecessors, (97), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-14 11:42:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 121 transitions. [2021-12-14 11:42:30,391 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 121 transitions. Word has length 48 [2021-12-14 11:42:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:30,392 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 121 transitions. [2021-12-14 11:42:30,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 11:42:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 121 transitions. [2021-12-14 11:42:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 11:42:30,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:30,393 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:30,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 11:42:30,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:30,615 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:30,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash -230486842, now seen corresponding path program 1 times [2021-12-14 11:42:30,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:30,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193225305] [2021-12-14 11:42:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:30,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 11:42:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 11:42:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:30,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:30,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193225305] [2021-12-14 11:42:30,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193225305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:30,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841203022] [2021-12-14 11:42:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:30,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:30,692 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) [2021-12-14 11:42:30,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:42:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:42:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:30,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 11:42:30,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841203022] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:30,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:42:30,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2021-12-14 11:42:30,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564854706] [2021-12-14 11:42:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:42:30,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:42:30,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:42:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:42:30,923 INFO L87 Difference]: Start difference. First operand 86 states and 121 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:30,954 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2021-12-14 11:42:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 11:42:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-12-14 11:42:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:30,956 INFO L225 Difference]: With dead ends: 109 [2021-12-14 11:42:30,957 INFO L226 Difference]: Without dead ends: 103 [2021-12-14 11:42:30,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-14 11:42:30,960 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:30,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-14 11:42:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-14 11:42:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 89 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-14 11:42:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2021-12-14 11:42:30,983 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 50 [2021-12-14 11:42:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:30,983 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2021-12-14 11:42:30,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2021-12-14 11:42:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 11:42:30,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:30,984 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:31,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:42:31,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:31,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash -173228540, now seen corresponding path program 1 times [2021-12-14 11:42:31,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741001094] [2021-12-14 11:42:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:31,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 11:42:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 11:42:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 11:42:31,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:31,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741001094] [2021-12-14 11:42:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741001094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:42:31,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:42:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 11:42:31,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050839101] [2021-12-14 11:42:31,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:42:31,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:42:31,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:42:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:42:31,263 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:31,291 INFO L93 Difference]: Finished difference Result 107 states and 142 transitions. [2021-12-14 11:42:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:42:31,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-12-14 11:42:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:31,292 INFO L225 Difference]: With dead ends: 107 [2021-12-14 11:42:31,292 INFO L226 Difference]: Without dead ends: 90 [2021-12-14 11:42:31,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:42:31,293 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:31,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 293 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-14 11:42:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-14 11:42:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 79 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2021-12-14 11:42:31,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 50 [2021-12-14 11:42:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:31,311 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2021-12-14 11:42:31,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:42:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2021-12-14 11:42:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 11:42:31,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:31,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:31,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 11:42:31,313 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:31,313 INFO L85 PathProgramCache]: Analyzing trace with hash -100773931, now seen corresponding path program 1 times [2021-12-14 11:42:31,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:31,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596380622] [2021-12-14 11:42:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:31,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 11:42:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 11:42:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:31,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:31,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596380622] [2021-12-14 11:42:31,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596380622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:31,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397892961] [2021-12-14 11:42:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:31,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:31,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:31,381 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) [2021-12-14 11:42:31,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:42:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 11:42:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:31,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:42:31,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397892961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:42:31,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:42:31,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-12-14 11:42:31,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626060312] [2021-12-14 11:42:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:42:31,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:42:31,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:42:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:42:31,505 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 11:42:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:31,559 INFO L93 Difference]: Finished difference Result 190 states and 256 transitions. [2021-12-14 11:42:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:42:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-12-14 11:42:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:31,560 INFO L225 Difference]: With dead ends: 190 [2021-12-14 11:42:31,561 INFO L226 Difference]: Without dead ends: 107 [2021-12-14 11:42:31,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:42:31,561 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:31,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 193 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-14 11:42:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-12-14 11:42:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 80 states have internal predecessors, (100), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2021-12-14 11:42:31,566 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 52 [2021-12-14 11:42:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:31,567 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2021-12-14 11:42:31,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 11:42:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2021-12-14 11:42:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 11:42:31,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:31,568 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:31,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:42:31,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:31,784 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1073437282, now seen corresponding path program 1 times [2021-12-14 11:42:31,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:31,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207193603] [2021-12-14 11:42:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:31,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 11:42:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 11:42:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:31,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:31,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207193603] [2021-12-14 11:42:31,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207193603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:31,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917114414] [2021-12-14 11:42:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:31,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:31,824 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) [2021-12-14 11:42:31,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:42:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:31,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:42:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:31,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:32,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917114414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:42:32,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:42:32,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-12-14 11:42:32,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017462446] [2021-12-14 11:42:32,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:42:32,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 11:42:32,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:32,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 11:42:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 11:42:32,069 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 11:42:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:32,148 INFO L93 Difference]: Finished difference Result 211 states and 291 transitions. [2021-12-14 11:42:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 11:42:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 53 [2021-12-14 11:42:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:32,149 INFO L225 Difference]: With dead ends: 211 [2021-12-14 11:42:32,149 INFO L226 Difference]: Without dead ends: 127 [2021-12-14 11:42:32,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-12-14 11:42:32,150 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 101 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:32,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 232 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:42:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-14 11:42:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-12-14 11:42:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2021-12-14 11:42:32,156 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 53 [2021-12-14 11:42:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:32,156 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2021-12-14 11:42:32,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 11:42:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2021-12-14 11:42:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 11:42:32,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:32,157 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:32,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 11:42:32,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:32,374 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2015352415, now seen corresponding path program 1 times [2021-12-14 11:42:32,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:32,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091931481] [2021-12-14 11:42:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:32,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:32,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:32,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:32,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 11:42:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:32,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 11:42:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:32,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091931481] [2021-12-14 11:42:32,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091931481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355913824] [2021-12-14 11:42:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:32,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:32,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:32,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:42:32,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:42:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 11:42:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:32,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:32,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355913824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:42:32,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:42:32,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-12-14 11:42:32,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737606264] [2021-12-14 11:42:32,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:42:32,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 11:42:32,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:32,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 11:42:32,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:42:32,742 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 11:42:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:33,064 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2021-12-14 11:42:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:42:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2021-12-14 11:42:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:33,066 INFO L225 Difference]: With dead ends: 223 [2021-12-14 11:42:33,066 INFO L226 Difference]: Without dead ends: 131 [2021-12-14 11:42:33,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-12-14 11:42:33,067 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 144 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:33,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 241 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:42:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-14 11:42:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2021-12-14 11:42:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 92 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2021-12-14 11:42:33,072 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2021-12-14 11:42:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:33,072 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2021-12-14 11:42:33,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 11:42:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2021-12-14 11:42:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 11:42:33,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:33,073 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:33,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 11:42:33,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:33,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 173315734, now seen corresponding path program 2 times [2021-12-14 11:42:33,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:33,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057842519] [2021-12-14 11:42:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:33,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:33,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:33,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 11:42:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:33,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 11:42:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:33,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:33,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057842519] [2021-12-14 11:42:33,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057842519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:33,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037930097] [2021-12-14 11:42:33,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:42:33,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:33,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:33,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:42:33,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:42:33,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:42:33,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:42:33,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 11:42:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:33,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:33,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037930097] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:42:33,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:42:33,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-12-14 11:42:33,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499971828] [2021-12-14 11:42:33,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:42:33,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 11:42:33,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 11:42:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-12-14 11:42:33,800 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 11:42:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:33,930 INFO L93 Difference]: Finished difference Result 274 states and 391 transitions. [2021-12-14 11:42:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 11:42:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-14 11:42:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:33,932 INFO L225 Difference]: With dead ends: 274 [2021-12-14 11:42:33,932 INFO L226 Difference]: Without dead ends: 178 [2021-12-14 11:42:33,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=432, Unknown=0, NotChecked=0, Total=702 [2021-12-14 11:42:33,933 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 167 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:33,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 420 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:42:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-14 11:42:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 117. [2021-12-14 11:42:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.361904761904762) internal successors, (143), 106 states have internal predecessors, (143), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2021-12-14 11:42:33,944 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 62 [2021-12-14 11:42:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:33,945 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2021-12-14 11:42:33,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 11:42:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2021-12-14 11:42:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 11:42:33,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:33,946 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:33,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 11:42:34,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 11:42:34,162 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash 103329953, now seen corresponding path program 2 times [2021-12-14 11:42:34,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624744831] [2021-12-14 11:42:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:34,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:34,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:34,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 11:42:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:34,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 11:42:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:34,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624744831] [2021-12-14 11:42:34,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624744831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486684276] [2021-12-14 11:42:34,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:42:34,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:34,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:42:34,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 11:42:34,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:42:34,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:42:34,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 11:42:34,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:34,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:34,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486684276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:42:34,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:42:34,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-14 11:42:34,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339199753] [2021-12-14 11:42:34,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:42:34,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 11:42:34,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 11:42:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:42:34,851 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 25 states, 25 states have (on average 4.2) internal successors, (105), 25 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 11:42:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:50,717 INFO L93 Difference]: Finished difference Result 293 states and 416 transitions. [2021-12-14 11:42:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 11:42:50,717 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.2) internal successors, (105), 25 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-12-14 11:42:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:50,718 INFO L225 Difference]: With dead ends: 293 [2021-12-14 11:42:50,718 INFO L226 Difference]: Without dead ends: 183 [2021-12-14 11:42:50,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=502, Invalid=902, Unknown=2, NotChecked=0, Total=1406 [2021-12-14 11:42:50,719 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 271 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:50,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 758 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 11:42:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-14 11:42:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2021-12-14 11:42:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.391304347826087) internal successors, (160), 116 states have internal predecessors, (160), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 181 transitions. [2021-12-14 11:42:50,729 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 181 transitions. Word has length 67 [2021-12-14 11:42:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:50,729 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 181 transitions. [2021-12-14 11:42:50,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.2) internal successors, (105), 25 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 11:42:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 181 transitions. [2021-12-14 11:42:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 11:42:50,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:50,731 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:50,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 11:42:50,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:50,947 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1524110314, now seen corresponding path program 3 times [2021-12-14 11:42:50,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:50,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689710950] [2021-12-14 11:42:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:50,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:50,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:51,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 11:42:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:51,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 11:42:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:51,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:51,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689710950] [2021-12-14 11:42:51,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689710950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:51,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402744691] [2021-12-14 11:42:51,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:42:51,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:51,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:51,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:42:51,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 11:42:51,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-14 11:42:51,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:42:51,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 11:42:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:51,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:42:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:51,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402744691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:42:51,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:42:51,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2021-12-14 11:42:51,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11724828] [2021-12-14 11:42:51,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:42:51,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-14 11:42:51,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:42:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-14 11:42:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 11:42:51,916 INFO L87 Difference]: Start difference. First operand 127 states and 181 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 11:42:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:42:52,168 INFO L93 Difference]: Finished difference Result 400 states and 591 transitions. [2021-12-14 11:42:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-14 11:42:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-12-14 11:42:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:42:52,170 INFO L225 Difference]: With dead ends: 400 [2021-12-14 11:42:52,170 INFO L226 Difference]: Without dead ends: 280 [2021-12-14 11:42:52,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=972, Invalid=1578, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 11:42:52,172 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 503 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:42:52,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 451 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:42:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-14 11:42:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 153. [2021-12-14 11:42:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.4397163120567376) internal successors, (203), 142 states have internal predecessors, (203), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 11:42:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 224 transitions. [2021-12-14 11:42:52,183 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 224 transitions. Word has length 80 [2021-12-14 11:42:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:42:52,183 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 224 transitions. [2021-12-14 11:42:52,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 11:42:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 224 transitions. [2021-12-14 11:42:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 11:42:52,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:52,184 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:52,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 11:42:52,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 11:42:52,389 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash 264388257, now seen corresponding path program 3 times [2021-12-14 11:42:52,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734376547] [2021-12-14 11:42:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:52,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:52,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:42:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:52,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:42:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 11:42:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:52,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 11:42:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:42:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:42:52,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:42:52,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734376547] [2021-12-14 11:42:52,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734376547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:42:52,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099893577] [2021-12-14 11:42:52,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:42:52,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:42:52,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:52,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:42:52,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 11:42:53,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-14 11:42:53,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:42:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 11:42:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:42:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:42:53,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 11:43:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099893577] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:20,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:43:20,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2021-12-14 11:43:20,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266448610] [2021-12-14 11:43:20,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:20,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-14 11:43:20,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:43:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-14 11:43:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1857, Unknown=5, NotChecked=0, Total=2550 [2021-12-14 11:43:20,260 INFO L87 Difference]: Start difference. First operand 153 states and 224 transitions. Second operand has 51 states, 51 states have (on average 3.4705882352941178) internal successors, (177), 51 states have internal predecessors, (177), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)