./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/reducercommutativity/sep10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:54:16,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:54:16,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:54:16,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:54:16,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:54:16,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:54:16,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:54:16,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:54:16,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:54:16,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:54:16,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:54:16,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:54:16,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:54:16,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:54:16,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:54:16,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:54:16,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:54:16,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:54:16,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:54:16,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:54:16,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:54:16,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:54:16,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:54:16,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:54:16,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:54:16,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:54:16,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:54:16,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:54:16,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:54:16,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:54:16,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:54:16,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:54:16,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:54:16,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:54:16,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:54:16,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:54:16,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:54:16,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:54:16,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:54:16,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:54:16,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:54:16,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:54:16,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:54:16,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:54:16,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:54:16,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:54:16,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:54:16,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:54:16,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:54:16,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:54:16,997 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:54:16,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:54:16,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:54:16,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:54:16,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:54:16,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:54:16,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:54:16,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:54:16,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:54:16,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:54:16,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:54:16,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:54:16,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:54:16,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:54:16,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:54:16,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:54:17,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:54:17,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:54:17,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:54:17,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:54:17,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:54:17,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:54:17,001 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:54:17,001 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:54:17,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:54:17,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:54:17,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 [2021-12-21 09:54:17,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:54:17,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:54:17,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:54:17,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:54:17,191 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:54:17,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep10-2.i [2021-12-21 09:54:17,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2bf78e9d/d137f6396ac645c1a85e33fb665b3f7f/FLAG5c3cfed74 [2021-12-21 09:54:17,627 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:54:17,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2021-12-21 09:54:17,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2bf78e9d/d137f6396ac645c1a85e33fb665b3f7f/FLAG5c3cfed74 [2021-12-21 09:54:17,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2bf78e9d/d137f6396ac645c1a85e33fb665b3f7f [2021-12-21 09:54:17,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:54:17,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:54:17,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:54:17,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:54:17,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:54:17,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56663a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17, skipping insertion in model container [2021-12-21 09:54:17,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:54:17,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:54:17,790 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/reducercommutativity/sep10-2.i[1293,1306] [2021-12-21 09:54:17,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:54:17,798 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:54:17,830 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/reducercommutativity/sep10-2.i[1293,1306] [2021-12-21 09:54:17,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:54:17,841 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:54:17,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17 WrapperNode [2021-12-21 09:54:17,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:54:17,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:54:17,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:54:17,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:54:17,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,877 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-21 09:54:17,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:54:17,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:54:17,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:54:17,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:54:17,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:54:17,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:54:17,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:54:17,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:54:17,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (1/1) ... [2021-12-21 09:54:17,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:54:17,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:17,938 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) [2021-12-21 09:54:17,963 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 [2021-12-21 09:54:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:54:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:54:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:54:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:54:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:54:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:54:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:54:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:54:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2021-12-21 09:54:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2021-12-21 09:54:18,057 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:54:18,058 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:54:18,205 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:54:18,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:54:18,210 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 09:54:18,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:54:18 BoogieIcfgContainer [2021-12-21 09:54:18,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:54:18,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:54:18,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:54:18,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:54:18,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:54:17" (1/3) ... [2021-12-21 09:54:18,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4933d032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:54:18, skipping insertion in model container [2021-12-21 09:54:18,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:54:17" (2/3) ... [2021-12-21 09:54:18,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4933d032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:54:18, skipping insertion in model container [2021-12-21 09:54:18,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:54:18" (3/3) ... [2021-12-21 09:54:18,232 INFO L111 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2021-12-21 09:54:18,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:54:18,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:54:18,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:54:18,288 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 [2021-12-21 09:54:18,288 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:54:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 09:54:18,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:18,315 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:18,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2021-12-21 09:54:18,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:18,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991747426] [2021-12-21 09:54:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:18,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 09:54:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 09:54:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 09:54:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 09:54:18,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991747426] [2021-12-21 09:54:18,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991747426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:54:18,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:54:18,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:54:18,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828196435] [2021-12-21 09:54:18,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:54:18,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:54:18,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:54:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:54:18,552 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 09:54:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:18,582 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-12-21 09:54:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:54:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-21 09:54:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:18,590 INFO L225 Difference]: With dead ends: 52 [2021-12-21 09:54:18,590 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 09:54:18,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:54:18,597 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 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 [2021-12-21 09:54:18,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 09:54:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-21 09:54:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-21 09:54:18,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-12-21 09:54:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:18,629 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-21 09:54:18,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 09:54:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-21 09:54:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 09:54:18,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:18,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:18,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:54:18,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2021-12-21 09:54:18,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099863191] [2021-12-21 09:54:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:18,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 09:54:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 09:54:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 09:54:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 09:54:18,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:18,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099863191] [2021-12-21 09:54:18,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099863191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898983906] [2021-12-21 09:54:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:18,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:18,706 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) [2021-12-21 09:54:18,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:54:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:18,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 09:54:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 09:54:18,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:54:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898983906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:54:18,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:54:18,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 09:54:18,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965605961] [2021-12-21 09:54:18,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:54:18,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:54:18,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:54:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:54:18,835 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:54:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:18,842 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-21 09:54:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:54:18,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-21 09:54:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:18,843 INFO L225 Difference]: With dead ends: 45 [2021-12-21 09:54:18,843 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 09:54:18,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:54:18,845 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 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 [2021-12-21 09:54:18,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 09:54:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-21 09:54:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-21 09:54:18,849 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2021-12-21 09:54:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:18,849 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-21 09:54:18,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:54:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-21 09:54:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 09:54:18,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:18,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:18,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:19,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:19,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2021-12-21 09:54:19,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:19,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366477651] [2021-12-21 09:54:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:19,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 09:54:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 09:54:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 09:54:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 09:54:19,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366477651] [2021-12-21 09:54:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366477651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630383982] [2021-12-21 09:54:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:19,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:19,178 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) [2021-12-21 09:54:19,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:54:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 09:54:19,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 09:54:19,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 09:54:19,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630383982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:54:19,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:54:19,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 09:54:19,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974011777] [2021-12-21 09:54:19,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:54:19,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:54:19,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:19,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:54:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:54:19,347 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:54:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:19,364 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-12-21 09:54:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:54:19,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-21 09:54:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:19,366 INFO L225 Difference]: With dead ends: 41 [2021-12-21 09:54:19,367 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 09:54:19,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:54:19,369 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:19,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 09:54:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-12-21 09:54:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-21 09:54:19,377 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2021-12-21 09:54:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:19,378 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-21 09:54:19,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 09:54:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-21 09:54:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 09:54:19,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:19,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:19,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:19,581 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,SelfDestructingSolverStorable2 [2021-12-21 09:54:19,582 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2021-12-21 09:54:19,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:19,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851732018] [2021-12-21 09:54:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:19,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 09:54:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 09:54:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 09:54:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 09:54:19,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:19,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851732018] [2021-12-21 09:54:19,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851732018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:19,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697965515] [2021-12-21 09:54:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:19,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:19,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:19,678 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) [2021-12-21 09:54:19,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:54:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:54:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 09:54:19,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 09:54:19,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697965515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:19,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:19,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-21 09:54:19,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104985376] [2021-12-21 09:54:19,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:19,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 09:54:19,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 09:54:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:54:19,927 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:54:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:19,956 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-12-21 09:54:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 09:54:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-21 09:54:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:19,957 INFO L225 Difference]: With dead ends: 58 [2021-12-21 09:54:19,957 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 09:54:19,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:54:19,959 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:19,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 09:54:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-21 09:54:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-21 09:54:19,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2021-12-21 09:54:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:19,963 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-21 09:54:19,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 09:54:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-21 09:54:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 09:54:19,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:19,964 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:19,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:20,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:20,195 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2021-12-21 09:54:20,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:20,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813938921] [2021-12-21 09:54:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:20,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 09:54:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 09:54:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 09:54:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-21 09:54:20,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:20,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813938921] [2021-12-21 09:54:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813938921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673195213] [2021-12-21 09:54:20,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:54:20,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:20,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:20,271 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) [2021-12-21 09:54:20,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:54:20,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:54:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:54:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:54:20,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-21 09:54:20,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-21 09:54:20,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673195213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:20,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:20,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-21 09:54:20,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449388765] [2021-12-21 09:54:20,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:20,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 09:54:20,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 09:54:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:54:20,557 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 09:54:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:20,593 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2021-12-21 09:54:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 09:54:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-12-21 09:54:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:20,594 INFO L225 Difference]: With dead ends: 74 [2021-12-21 09:54:20,594 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 09:54:20,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-21 09:54:20,595 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:20,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 09:54:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-21 09:54:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-21 09:54:20,608 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2021-12-21 09:54:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:20,608 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-21 09:54:20,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 09:54:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-21 09:54:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-21 09:54:20,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:20,612 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:20,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:20,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:20,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2021-12-21 09:54:20,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402493516] [2021-12-21 09:54:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:20,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:54:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 09:54:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 09:54:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-21 09:54:20,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:20,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402493516] [2021-12-21 09:54:20,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402493516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:20,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587259675] [2021-12-21 09:54:20,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:54:20,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:20,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:20,919 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) [2021-12-21 09:54:20,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:54:20,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 09:54:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:54:20,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 09:54:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-21 09:54:21,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-21 09:54:21,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587259675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:21,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:21,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 09:54:21,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593285688] [2021-12-21 09:54:21,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:21,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 09:54:21,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 09:54:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 09:54:21,177 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:54:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:21,208 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2021-12-21 09:54:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 09:54:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2021-12-21 09:54:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:21,211 INFO L225 Difference]: With dead ends: 86 [2021-12-21 09:54:21,211 INFO L226 Difference]: Without dead ends: 61 [2021-12-21 09:54:21,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-21 09:54:21,213 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:21,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-21 09:54:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-21 09:54:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-21 09:54:21,222 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 70 [2021-12-21 09:54:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:21,222 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-21 09:54:21,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 09:54:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-21 09:54:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 09:54:21,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:21,226 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:21,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:21,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:21,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash -189786485, now seen corresponding path program 4 times [2021-12-21 09:54:21,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200690346] [2021-12-21 09:54:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:21,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:21,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:54:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 09:54:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:21,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 09:54:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-21 09:54:21,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:21,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200690346] [2021-12-21 09:54:21,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200690346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:21,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047551113] [2021-12-21 09:54:21,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:54:21,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:21,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:21,564 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) [2021-12-21 09:54:21,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 09:54:21,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:54:21,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:54:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 09:54:21,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-21 09:54:21,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-21 09:54:21,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047551113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:21,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:21,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-12-21 09:54:21,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268895393] [2021-12-21 09:54:21,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:21,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 09:54:21,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 09:54:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:54:21,969 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 09:54:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:21,996 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2021-12-21 09:54:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 09:54:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 106 [2021-12-21 09:54:21,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:21,997 INFO L225 Difference]: With dead ends: 110 [2021-12-21 09:54:21,997 INFO L226 Difference]: Without dead ends: 73 [2021-12-21 09:54:21,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:54:21,998 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:21,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-21 09:54:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-21 09:54:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-12-21 09:54:22,004 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 106 [2021-12-21 09:54:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:22,004 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-12-21 09:54:22,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 09:54:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-12-21 09:54:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 09:54:22,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:22,006 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:22,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:22,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:22,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1263048203, now seen corresponding path program 5 times [2021-12-21 09:54:22,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:22,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803180946] [2021-12-21 09:54:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:22,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:54:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 09:54:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:22,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-21 09:54:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-21 09:54:22,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803180946] [2021-12-21 09:54:22,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803180946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235935762] [2021-12-21 09:54:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:54:22,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:22,404 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) [2021-12-21 09:54:22,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 09:54:22,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-21 09:54:22,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:54:22,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 09:54:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 650 proven. 4 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-21 09:54:22,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-21 09:54:23,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235935762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:23,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:23,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-21 09:54:23,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318907472] [2021-12-21 09:54:23,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 09:54:23,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 09:54:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:54:23,084 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 09:54:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:23,103 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-12-21 09:54:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 09:54:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2021-12-21 09:54:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:23,104 INFO L225 Difference]: With dead ends: 122 [2021-12-21 09:54:23,104 INFO L226 Difference]: Without dead ends: 81 [2021-12-21 09:54:23,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-21 09:54:23,105 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:23,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-21 09:54:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-21 09:54:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2021-12-21 09:54:23,111 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 142 [2021-12-21 09:54:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:23,111 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2021-12-21 09:54:23,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 09:54:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2021-12-21 09:54:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-21 09:54:23,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:23,113 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:23,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:23,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:23,331 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash -660788349, now seen corresponding path program 6 times [2021-12-21 09:54:23,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:23,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745372385] [2021-12-21 09:54:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:23,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:23,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:54:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:23,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 09:54:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:23,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 09:54:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-21 09:54:23,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:23,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745372385] [2021-12-21 09:54:23,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745372385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:23,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92841677] [2021-12-21 09:54:23,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:54:23,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:23,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:23,496 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) [2021-12-21 09:54:23,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 09:54:23,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-21 09:54:23,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:54:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 09:54:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-21 09:54:23,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-21 09:54:24,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92841677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:24,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:24,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-12-21 09:54:24,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448975642] [2021-12-21 09:54:24,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:24,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 09:54:24,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:24,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 09:54:24,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:54:24,136 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 09:54:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:24,158 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2021-12-21 09:54:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 09:54:24,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2021-12-21 09:54:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:24,176 INFO L225 Difference]: With dead ends: 128 [2021-12-21 09:54:24,176 INFO L226 Difference]: Without dead ends: 87 [2021-12-21 09:54:24,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-21 09:54:24,177 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:24,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:54:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-21 09:54:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-21 09:54:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 82 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 09:54:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-12-21 09:54:24,182 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 150 [2021-12-21 09:54:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:24,182 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-12-21 09:54:24,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 09:54:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-12-21 09:54:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 09:54:24,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:24,183 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:24,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:24,398 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,SelfDestructingSolverStorable8 [2021-12-21 09:54:24,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1766594339, now seen corresponding path program 7 times [2021-12-21 09:54:24,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924288025] [2021-12-21 09:54:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:24,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:24,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:54:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:24,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 09:54:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 09:54:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-21 09:54:25,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924288025] [2021-12-21 09:54:25,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924288025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707169478] [2021-12-21 09:54:25,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 09:54:25,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:25,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:25,244 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) [2021-12-21 09:54:25,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 09:54:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-21 09:54:25,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-21 09:54:26,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-21 09:54:27,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707169478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:27,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:27,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 38 [2021-12-21 09:54:27,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283963190] [2021-12-21 09:54:27,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:27,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-21 09:54:27,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-21 09:54:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 09:54:27,293 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 09:54:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:27,800 INFO L93 Difference]: Finished difference Result 293 states and 410 transitions. [2021-12-21 09:54:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 09:54:27,801 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 156 [2021-12-21 09:54:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:27,804 INFO L225 Difference]: With dead ends: 293 [2021-12-21 09:54:27,804 INFO L226 Difference]: Without dead ends: 289 [2021-12-21 09:54:27,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 309 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 09:54:27,805 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 65 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 3275 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:27,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 3275 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 09:54:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-21 09:54:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 229. [2021-12-21 09:54:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 221 states have (on average 1.2714932126696832) internal successors, (281), 222 states have internal predecessors, (281), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 09:54:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2021-12-21 09:54:27,828 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 156 [2021-12-21 09:54:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:27,829 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2021-12-21 09:54:27,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 09:54:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2021-12-21 09:54:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 09:54:27,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:27,831 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:27,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:28,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 09:54:28,050 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1086535969, now seen corresponding path program 1 times [2021-12-21 09:54:28,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:28,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123840839] [2021-12-21 09:54:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:28,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:28,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:54:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:28,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 09:54:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 09:54:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 324 proven. 964 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-21 09:54:29,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:29,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123840839] [2021-12-21 09:54:29,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123840839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:29,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194106169] [2021-12-21 09:54:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:29,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:29,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:29,360 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) [2021-12-21 09:54:29,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 09:54:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-21 09:54:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:30,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-21 09:54:30,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-21 09:54:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-12-21 09:54:31,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:54:32,038 INFO L353 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2021-12-21 09:54:32,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 09:54:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 676 proven. 460 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-12-21 09:54:32,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194106169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:54:32,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:54:32,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 20] total 65 [2021-12-21 09:54:32,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042592600] [2021-12-21 09:54:32,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:54:32,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-21 09:54:32,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:54:32,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-21 09:54:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3931, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 09:54:32,129 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand has 65 states, 63 states have (on average 2.857142857142857) internal successors, (180), 62 states have internal predecessors, (180), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 09:54:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:54:35,919 INFO L93 Difference]: Finished difference Result 923 states and 1272 transitions. [2021-12-21 09:54:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-21 09:54:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.857142857142857) internal successors, (180), 62 states have internal predecessors, (180), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 156 [2021-12-21 09:54:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:54:35,924 INFO L225 Difference]: With dead ends: 923 [2021-12-21 09:54:35,925 INFO L226 Difference]: Without dead ends: 674 [2021-12-21 09:54:35,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 322 SyntacticMatches, 9 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3725 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=957, Invalid=13805, Unknown=0, NotChecked=0, Total=14762 [2021-12-21 09:54:35,929 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 318 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 994 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:54:35,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1285 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2119 Invalid, 0 Unknown, 994 Unchecked, 1.0s Time] [2021-12-21 09:54:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-21 09:54:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 624. [2021-12-21 09:54:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 605 states have (on average 1.3454545454545455) internal successors, (814), 610 states have internal predecessors, (814), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (53), 9 states have call predecessors, (53), 9 states have call successors, (53) [2021-12-21 09:54:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 876 transitions. [2021-12-21 09:54:35,985 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 876 transitions. Word has length 156 [2021-12-21 09:54:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:54:35,985 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 876 transitions. [2021-12-21 09:54:35,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.857142857142857) internal successors, (180), 62 states have internal predecessors, (180), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 09:54:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 876 transitions. [2021-12-21 09:54:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 09:54:35,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:54:35,990 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:54:36,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 09:54:36,208 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,SelfDestructingSolverStorable10 [2021-12-21 09:54:36,209 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:54:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:54:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1508428901, now seen corresponding path program 2 times [2021-12-21 09:54:36,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:54:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496833776] [2021-12-21 09:54:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:54:36,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:54:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:37,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:54:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:37,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 09:54:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:37,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 09:54:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:54:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1092 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-21 09:54:37,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:54:37,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496833776] [2021-12-21 09:54:37,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496833776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:54:37,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896242504] [2021-12-21 09:54:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:54:37,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:54:37,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:54:37,848 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) [2021-12-21 09:54:37,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 09:54:37,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:54:37,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:54:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-21 09:54:37,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:54:38,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2021-12-21 09:54:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2021-12-21 09:54:38,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:38,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 09:54:38,933 INFO L353 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-21 09:54:38,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 52 [2021-12-21 09:54:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:54:39,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 09:54:39,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 09:54:39,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 58 [2021-12-21 09:54:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 27 proven. 1416 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-21 09:54:39,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:05,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896242504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:05,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 09:55:05,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 49] total 56 [2021-12-21 09:55:05,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516832014] [2021-12-21 09:55:05,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:05,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-21 09:55:05,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-21 09:55:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=6756, Unknown=30, NotChecked=0, Total=7140 [2021-12-21 09:55:05,098 INFO L87 Difference]: Start difference. First operand 624 states and 876 transitions. Second operand has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 09:55:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:07,177 INFO L93 Difference]: Finished difference Result 1765 states and 2566 transitions. [2021-12-21 09:55:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-21 09:55:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 156 [2021-12-21 09:55:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:07,190 INFO L225 Difference]: With dead ends: 1765 [2021-12-21 09:55:07,191 INFO L226 Difference]: Without dead ends: 1616 [2021-12-21 09:55:07,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 198 SyntacticMatches, 16 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3470 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=660, Invalid=11966, Unknown=30, NotChecked=0, Total=12656 [2021-12-21 09:55:07,196 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 110 mSDsluCounter, 2202 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 3422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1130 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:07,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 2284 Invalid, 3422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2227 Invalid, 0 Unknown, 1130 Unchecked, 0.9s Time] [2021-12-21 09:55:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-12-21 09:55:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1512. [2021-12-21 09:55:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1467 states have (on average 1.3476482617586911) internal successors, (1977), 1485 states have internal predecessors, (1977), 17 states have call successors, (17), 9 states have call predecessors, (17), 27 states have return successors, (207), 17 states have call predecessors, (207), 17 states have call successors, (207) [2021-12-21 09:55:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2201 transitions. [2021-12-21 09:55:07,296 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2201 transitions. Word has length 156 [2021-12-21 09:55:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:07,296 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2201 transitions. [2021-12-21 09:55:07,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 09:55:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2201 transitions. [2021-12-21 09:55:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 09:55:07,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:07,305 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:07,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 09:55:07,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 09:55:07,524 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:07,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1248509279, now seen corresponding path program 3 times [2021-12-21 09:55:07,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:07,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45092442] [2021-12-21 09:55:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:07,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:08,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 09:55:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:08,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 09:55:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:08,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 09:55:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 650 proven. 770 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-21 09:55:09,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45092442] [2021-12-21 09:55:09,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45092442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737064961] [2021-12-21 09:55:09,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:55:09,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:09,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:09,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 09:55:09,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-21 09:55:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:09,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-21 09:55:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:10,383 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:10,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-21 09:55:10,436 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:10,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-21 09:55:10,490 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:10,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-21 09:55:10,547 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:10,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-21 09:55:10,603 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 09:55:10,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-21 09:55:10,618 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-21 09:55:10,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-12-21 09:55:10,718 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-21 09:55:10,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-12-21 09:55:10,847 INFO L353 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-12-21 09:55:10,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 63 [2021-12-21 09:55:11,014 INFO L353 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2021-12-21 09:55:11,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 83 [2021-12-21 09:55:11,334 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 09:55:11,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 28