./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/array-crafted/zero_sum3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 23:53:19,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 23:53:19,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 23:53:19,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 23:53:19,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 23:53:19,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 23:53:19,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 23:53:19,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 23:53:19,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 23:53:19,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 23:53:19,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 23:53:19,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 23:53:19,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 23:53:19,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 23:53:19,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 23:53:19,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 23:53:19,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 23:53:19,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 23:53:19,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 23:53:19,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 23:53:19,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 23:53:19,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 23:53:19,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 23:53:19,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 23:53:20,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 23:53:20,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 23:53:20,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 23:53:20,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 23:53:20,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 23:53:20,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 23:53:20,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 23:53:20,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 23:53:20,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 23:53:20,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 23:53:20,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 23:53:20,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 23:53:20,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 23:53:20,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 23:53:20,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 23:53:20,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 23:53:20,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 23:53:20,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 23:53:20,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 23:53:20,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 23:53:20,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 23:53:20,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 23:53:20,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 23:53:20,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 23:53:20,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 23:53:20,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 23:53:20,034 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 23:53:20,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 23:53:20,035 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 23:53:20,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 23:53:20,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 23:53:20,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 23:53:20,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 23:53:20,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 23:53:20,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 23:53:20,036 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 23:53:20,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 23:53:20,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 23:53:20,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 23:53:20,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 23:53:20,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 23:53:20,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 23:53:20,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:53:20,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 23:53:20,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 23:53:20,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 23:53:20,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 23:53:20,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 23:53:20,038 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 23:53:20,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 23:53:20,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 23:53:20,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 23:53:20,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2021-12-16 23:53:20,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 23:53:20,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 23:53:20,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 23:53:20,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 23:53:20,262 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 23:53:20,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum3.c [2021-12-16 23:53:20,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b752b6096/ace9ac4a8a3a43f8947194fab6936eac/FLAGaf460f873 [2021-12-16 23:53:20,683 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 23:53:20,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.c [2021-12-16 23:53:20,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b752b6096/ace9ac4a8a3a43f8947194fab6936eac/FLAGaf460f873 [2021-12-16 23:53:20,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b752b6096/ace9ac4a8a3a43f8947194fab6936eac [2021-12-16 23:53:20,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 23:53:20,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 23:53:20,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 23:53:20,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 23:53:20,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 23:53:20,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7748e33a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20, skipping insertion in model container [2021-12-16 23:53:20,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 23:53:20,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 23:53:20,865 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/array-crafted/zero_sum3.c[400,413] [2021-12-16 23:53:20,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:53:20,887 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 23:53:20,896 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/array-crafted/zero_sum3.c[400,413] [2021-12-16 23:53:20,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:53:20,922 INFO L208 MainTranslator]: Completed translation [2021-12-16 23:53:20,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20 WrapperNode [2021-12-16 23:53:20,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 23:53:20,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 23:53:20,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 23:53:20,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 23:53:20,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,957 INFO L137 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-12-16 23:53:20,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 23:53:20,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 23:53:20,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 23:53:20,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 23:53:20,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 23:53:20,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 23:53:20,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 23:53:20,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 23:53:20,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (1/1) ... [2021-12-16 23:53:20,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:53:21,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:21,031 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) [2021-12-16 23:53:21,046 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 [2021-12-16 23:53:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 23:53:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 23:53:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 23:53:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 23:53:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 23:53:21,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 23:53:21,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 23:53:21,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 23:53:21,116 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 23:53:21,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 23:53:21,279 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 23:53:21,294 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 23:53:21,294 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-16 23:53:21,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:53:21 BoogieIcfgContainer [2021-12-16 23:53:21,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 23:53:21,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 23:53:21,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 23:53:21,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 23:53:21,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 11:53:20" (1/3) ... [2021-12-16 23:53:21,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21056486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:53:21, skipping insertion in model container [2021-12-16 23:53:21,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:53:20" (2/3) ... [2021-12-16 23:53:21,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21056486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:53:21, skipping insertion in model container [2021-12-16 23:53:21,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:53:21" (3/3) ... [2021-12-16 23:53:21,301 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2021-12-16 23:53:21,304 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 23:53:21,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 23:53:21,354 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 23:53:21,360 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 [2021-12-16 23:53:21,360 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 23:53:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 23:53:21,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:21,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:21,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-12-16 23:53:21,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:21,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937704981] [2021-12-16 23:53:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:21,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:21,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937704981] [2021-12-16 23:53:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937704981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:53:21,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:53:21,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 23:53:21,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460457852] [2021-12-16 23:53:21,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:53:21,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 23:53:21,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 23:53:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:53:21,536 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:21,552 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-12-16 23:53:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 23:53:21,554 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 23:53:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:21,560 INFO L225 Difference]: With dead ends: 59 [2021-12-16 23:53:21,561 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 23:53:21,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:53:21,567 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:21,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:53:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 23:53:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-16 23:53:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-16 23:53:21,593 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-12-16 23:53:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:21,594 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-16 23:53:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-16 23:53:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 23:53:21,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:21,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:21,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 23:53:21,596 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:21,596 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-12-16 23:53:21,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:21,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511411829] [2021-12-16 23:53:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:21,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:21,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511411829] [2021-12-16 23:53:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511411829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:53:21,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:53:21,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 23:53:21,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743709632] [2021-12-16 23:53:21,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:53:21,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:53:21,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:53:21,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:53:21,657 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:21,688 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-16 23:53:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:53:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 23:53:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:21,689 INFO L225 Difference]: With dead ends: 51 [2021-12-16 23:53:21,689 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 23:53:21,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:53:21,691 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:21,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:53:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 23:53:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-16 23:53:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-16 23:53:21,697 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2021-12-16 23:53:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:21,698 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-16 23:53:21,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-16 23:53:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 23:53:21,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:21,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:21,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 23:53:21,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2021-12-16 23:53:21,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:21,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25762108] [2021-12-16 23:53:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:21,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:53:21,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:21,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25762108] [2021-12-16 23:53:21,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25762108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:53:21,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:53:21,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 23:53:21,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450105610] [2021-12-16 23:53:21,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:53:21,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 23:53:21,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:21,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 23:53:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:53:21,765 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:21,834 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-12-16 23:53:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 23:53:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 23:53:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:21,835 INFO L225 Difference]: With dead ends: 59 [2021-12-16 23:53:21,835 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 23:53:21,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:53:21,837 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:21,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:53:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 23:53:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-12-16 23:53:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-16 23:53:21,861 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2021-12-16 23:53:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:21,861 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-16 23:53:21,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-16 23:53:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 23:53:21,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:21,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:21,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 23:53:21,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2021-12-16 23:53:21,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:21,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728343645] [2021-12-16 23:53:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:21,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 23:53:21,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728343645] [2021-12-16 23:53:21,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728343645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:53:21,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280667106] [2021-12-16 23:53:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:21,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:21,932 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) [2021-12-16 23:53:21,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 23:53:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:53:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:53:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 23:53:22,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:53:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 23:53:22,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280667106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:53:22,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:53:22,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 23:53:22,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212211102] [2021-12-16 23:53:22,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:53:22,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 23:53:22,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 23:53:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:53:22,199 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:22,233 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-16 23:53:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 23:53:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 23:53:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:22,234 INFO L225 Difference]: With dead ends: 65 [2021-12-16 23:53:22,234 INFO L226 Difference]: Without dead ends: 37 [2021-12-16 23:53:22,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:53:22,236 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:22,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:53:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-16 23:53:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-12-16 23:53:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-16 23:53:22,247 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2021-12-16 23:53:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:22,247 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-16 23:53:22,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-16 23:53:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 23:53:22,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:22,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:22,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 23:53:22,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:22,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2021-12-16 23:53:22,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:22,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951833622] [2021-12-16 23:53:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:22,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:53:22,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:22,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951833622] [2021-12-16 23:53:22,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951833622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:53:22,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589164586] [2021-12-16 23:53:22,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:53:22,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:22,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:22,554 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) [2021-12-16 23:53:22,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 23:53:22,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:53:22,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:53:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:53:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:53:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:53:22,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:53:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:53:22,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589164586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:53:22,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:53:22,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-16 23:53:22,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736818183] [2021-12-16 23:53:22,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:53:22,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 23:53:22,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 23:53:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-16 23:53:22,826 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:22,930 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-12-16 23:53:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 23:53:22,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-16 23:53:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:22,931 INFO L225 Difference]: With dead ends: 78 [2021-12-16 23:53:22,931 INFO L226 Difference]: Without dead ends: 54 [2021-12-16 23:53:22,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-16 23:53:22,933 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:22,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:53:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-16 23:53:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-16 23:53:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-16 23:53:22,938 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-12-16 23:53:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:22,939 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-16 23:53:22,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-16 23:53:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 23:53:22,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:22,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:22,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 23:53:23,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:23,160 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2021-12-16 23:53:23,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:23,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345087775] [2021-12-16 23:53:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:23,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:24,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:24,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345087775] [2021-12-16 23:53:24,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345087775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:53:24,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356974650] [2021-12-16 23:53:24,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:53:24,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:24,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:24,356 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) [2021-12-16 23:53:24,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 23:53:24,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 23:53:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:53:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-16 23:53:24,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:53:26,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:53:26,366 INFO L388 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 15 treesize of output 16 [2021-12-16 23:53:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:26,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:53:35,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:53:35,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-16 23:53:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:36,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356974650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:53:36,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:53:36,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30, 32] total 71 [2021-12-16 23:53:36,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457002236] [2021-12-16 23:53:36,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:53:36,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-16 23:53:36,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-16 23:53:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=4490, Unknown=2, NotChecked=0, Total=4970 [2021-12-16 23:53:36,321 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 71 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 71 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:37,424 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2021-12-16 23:53:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 23:53:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 71 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-16 23:53:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:37,446 INFO L225 Difference]: With dead ends: 132 [2021-12-16 23:53:37,446 INFO L226 Difference]: Without dead ends: 126 [2021-12-16 23:53:37,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 40 SyntacticMatches, 28 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=740, Invalid=6914, Unknown=2, NotChecked=0, Total=7656 [2021-12-16 23:53:37,450 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:37,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 147 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 394 Invalid, 0 Unknown, 662 Unchecked, 0.2s Time] [2021-12-16 23:53:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-16 23:53:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 87. [2021-12-16 23:53:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-12-16 23:53:37,470 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 47 [2021-12-16 23:53:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:37,471 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-12-16 23:53:37,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 71 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-12-16 23:53:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 23:53:37,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:37,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:37,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 23:53:37,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:37,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2021-12-16 23:53:37,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:37,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116623491] [2021-12-16 23:53:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:37,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:53:37,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116623491] [2021-12-16 23:53:37,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116623491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:53:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666456708] [2021-12-16 23:53:37,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:53:37,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:37,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:37,768 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) [2021-12-16 23:53:37,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 23:53:37,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:53:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:53:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:53:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:53:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:53:37,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:53:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:53:38,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666456708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:53:38,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:53:38,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 23:53:38,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456864817] [2021-12-16 23:53:38,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:53:38,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:53:38,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:53:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:53:38,067 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:38,191 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2021-12-16 23:53:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 23:53:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 23:53:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:38,192 INFO L225 Difference]: With dead ends: 159 [2021-12-16 23:53:38,193 INFO L226 Difference]: Without dead ends: 87 [2021-12-16 23:53:38,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-16 23:53:38,194 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:38,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 62 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:53:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-16 23:53:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-16 23:53:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-12-16 23:53:38,208 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 49 [2021-12-16 23:53:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:38,209 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-12-16 23:53:38,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-12-16 23:53:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 23:53:38,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:38,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:38,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 23:53:38,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:38,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 5 times [2021-12-16 23:53:38,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678710491] [2021-12-16 23:53:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:38,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:53:38,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678710491] [2021-12-16 23:53:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678710491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:53:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794072445] [2021-12-16 23:53:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:53:38,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:38,513 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) [2021-12-16 23:53:38,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 23:53:38,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 23:53:38,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:53:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:53:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:53:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:53:38,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:53:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:53:38,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794072445] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:53:38,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:53:38,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 23:53:38,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724959666] [2021-12-16 23:53:38,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:53:38,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:53:38,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:53:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:53:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:53:38,743 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:53:38,863 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2021-12-16 23:53:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 23:53:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-16 23:53:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:53:38,864 INFO L225 Difference]: With dead ends: 139 [2021-12-16 23:53:38,864 INFO L226 Difference]: Without dead ends: 78 [2021-12-16 23:53:38,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 23:53:38,866 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:53:38,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 31 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:53:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-16 23:53:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2021-12-16 23:53:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-16 23:53:38,870 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-12-16 23:53:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:53:38,871 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-16 23:53:38,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:53:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-16 23:53:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 23:53:38,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:53:38,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:53:38,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 23:53:39,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:39,096 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:53:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:53:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-12-16 23:53:39,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:53:39,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283484029] [2021-12-16 23:53:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:53:39,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:53:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:53:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:40,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:53:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283484029] [2021-12-16 23:53:40,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283484029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:53:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25167664] [2021-12-16 23:53:40,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:53:40,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:53:40,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:53:40,880 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) [2021-12-16 23:53:40,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 23:53:40,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-16 23:53:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:53:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-16 23:53:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:53:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:53:42,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:15,752 INFO L354 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2021-12-16 23:54:15,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 152 treesize of output 263 [2021-12-16 23:54:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:54:19,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25167664] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:19,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:19,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 30, 34] total 94 [2021-12-16 23:54:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009791927] [2021-12-16 23:54:19,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:19,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-16 23:54:19,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-16 23:54:19,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=8077, Unknown=6, NotChecked=0, Total=8742 [2021-12-16 23:54:19,836 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 94 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 94 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:54:34,968 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2021-12-16 23:54:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-16 23:54:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 94 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 23:54:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:54:34,969 INFO L225 Difference]: With dead ends: 158 [2021-12-16 23:54:34,969 INFO L226 Difference]: Without dead ends: 154 [2021-12-16 23:54:34,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 61 SyntacticMatches, 17 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=1453, Invalid=18563, Unknown=6, NotChecked=0, Total=20022 [2021-12-16 23:54:34,973 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 23:54:34,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 208 Invalid, 4311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2486 Invalid, 0 Unknown, 1527 Unchecked, 1.4s Time] [2021-12-16 23:54:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-16 23:54:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 109. [2021-12-16 23:54:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-12-16 23:54:34,996 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 61 [2021-12-16 23:54:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:54:34,996 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-12-16 23:54:34,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 94 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-12-16 23:54:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 23:54:34,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:54:34,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:54:35,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 23:54:35,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:35,197 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2021-12-16 23:54:35,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:35,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740700516] [2021-12-16 23:54:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:35,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 23:54:35,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740700516] [2021-12-16 23:54:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740700516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423706891] [2021-12-16 23:54:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:54:35,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:35,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:35,307 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) [2021-12-16 23:54:35,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 23:54:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:35,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 23:54:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 23:54:35,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 23:54:35,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423706891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:35,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:35,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-16 23:54:35,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823762] [2021-12-16 23:54:35,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:35,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:54:35,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:54:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:54:35,591 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:54:35,763 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2021-12-16 23:54:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 23:54:35,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-16 23:54:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:54:35,764 INFO L225 Difference]: With dead ends: 225 [2021-12-16 23:54:35,764 INFO L226 Difference]: Without dead ends: 102 [2021-12-16 23:54:35,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-12-16 23:54:35,765 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:54:35,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 78 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:54:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-16 23:54:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-16 23:54:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.12) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2021-12-16 23:54:35,770 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 63 [2021-12-16 23:54:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:54:35,770 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2021-12-16 23:54:35,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2021-12-16 23:54:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 23:54:35,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:54:35,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:54:35,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 23:54:35,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:35,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2021-12-16 23:54:35,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184476469] [2021-12-16 23:54:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:35,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 23:54:36,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:36,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184476469] [2021-12-16 23:54:36,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184476469] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:36,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181553330] [2021-12-16 23:54:36,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:54:36,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:36,091 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) [2021-12-16 23:54:36,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 23:54:36,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:54:36,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:54:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 23:54:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 23:54:36,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 23:54:36,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181553330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:36,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:36,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-16 23:54:36,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261517135] [2021-12-16 23:54:36,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:36,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:54:36,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:36,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:54:36,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:54:36,378 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:54:36,543 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-12-16 23:54:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 23:54:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-16 23:54:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:54:36,545 INFO L225 Difference]: With dead ends: 155 [2021-12-16 23:54:36,545 INFO L226 Difference]: Without dead ends: 82 [2021-12-16 23:54:36,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:54:36,548 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 288 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:54:36,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 25 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:54:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-16 23:54:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-12-16 23:54:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-16 23:54:36,557 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-12-16 23:54:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:54:36,557 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-16 23:54:36,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:54:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-16 23:54:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 23:54:36,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:54:36,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:54:36,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 23:54:36,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 23:54:36,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:54:36,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:54:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2021-12-16 23:54:36,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:54:36,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818767523] [2021-12-16 23:54:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:54:36,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:54:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:54:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:54:39,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:54:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818767523] [2021-12-16 23:54:39,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818767523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:54:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488514385] [2021-12-16 23:54:39,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:54:39,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:54:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:54:39,960 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) [2021-12-16 23:54:39,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 23:54:40,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 23:54:40,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:54:40,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-16 23:54:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:54:40,094 INFO L388 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 15 treesize of output 11 [2021-12-16 23:54:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:54:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:54:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:54:44,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:54:44,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 59 [2021-12-16 23:54:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:54:44,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:54:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:54:51,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488514385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:54:51,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:54:51,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 26, 23] total 97 [2021-12-16 23:54:51,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168162270] [2021-12-16 23:54:51,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:54:51,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-16 23:54:51,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:54:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-16 23:54:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=8751, Unknown=0, NotChecked=0, Total=9312 [2021-12-16 23:54:51,627 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:55:00,463 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2021-12-16 23:55:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-16 23:55:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-16 23:55:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:55:00,464 INFO L225 Difference]: With dead ends: 151 [2021-12-16 23:55:00,464 INFO L226 Difference]: Without dead ends: 147 [2021-12-16 23:55:00,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 92 SyntacticMatches, 25 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8277 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1766, Invalid=27646, Unknown=0, NotChecked=0, Total=29412 [2021-12-16 23:55:00,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 852 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 23:55:00,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 204 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1510 Invalid, 0 Unknown, 852 Unchecked, 0.8s Time] [2021-12-16 23:55:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-16 23:55:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-12-16 23:55:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-12-16 23:55:00,488 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 75 [2021-12-16 23:55:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:55:00,489 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-12-16 23:55:00,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-12-16 23:55:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 23:55:00,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:55:00,490 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:55:00,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 23:55:00,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:00,708 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:55:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:55:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2021-12-16 23:55:00,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:55:00,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143489091] [2021-12-16 23:55:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:55:00,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:55:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:55:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-16 23:55:00,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:55:00,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143489091] [2021-12-16 23:55:00,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143489091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:55:00,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804505471] [2021-12-16 23:55:00,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:55:00,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:00,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:55:00,796 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) [2021-12-16 23:55:00,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 23:55:00,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:55:00,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:55:00,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 23:55:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:55:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-16 23:55:01,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:55:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-16 23:55:01,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804505471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:55:01,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:55:01,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-16 23:55:01,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737081529] [2021-12-16 23:55:01,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:55:01,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 23:55:01,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:55:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 23:55:01,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:55:01,166 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:55:01,409 INFO L93 Difference]: Finished difference Result 265 states and 290 transitions. [2021-12-16 23:55:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 23:55:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-16 23:55:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:55:01,410 INFO L225 Difference]: With dead ends: 265 [2021-12-16 23:55:01,410 INFO L226 Difference]: Without dead ends: 114 [2021-12-16 23:55:01,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-12-16 23:55:01,411 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:55:01,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 79 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:55:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-16 23:55:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-12-16 23:55:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0982142857142858) internal successors, (123), 112 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-12-16 23:55:01,416 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 77 [2021-12-16 23:55:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:55:01,416 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-12-16 23:55:01,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-12-16 23:55:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 23:55:01,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:55:01,417 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:55:01,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 23:55:01,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 23:55:01,618 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:55:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:55:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1014758264, now seen corresponding path program 11 times [2021-12-16 23:55:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:55:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639923071] [2021-12-16 23:55:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:55:01,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:55:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:55:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-16 23:55:01,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:55:01,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639923071] [2021-12-16 23:55:01,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639923071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:55:01,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892185083] [2021-12-16 23:55:01,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:55:01,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:55:01,709 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) [2021-12-16 23:55:01,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 23:55:01,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 23:55:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:55:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 23:55:01,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:55:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-16 23:55:02,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:55:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-16 23:55:02,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892185083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:55:02,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:55:02,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-12-16 23:55:02,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185087929] [2021-12-16 23:55:02,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:55:02,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:55:02,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:55:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:55:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:55:02,244 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:55:02,585 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2021-12-16 23:55:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 23:55:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 23:55:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:55:02,586 INFO L225 Difference]: With dead ends: 185 [2021-12-16 23:55:02,586 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 23:55:02,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 23:55:02,587 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 239 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:55:02,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 54 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:55:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 23:55:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-12-16 23:55:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-12-16 23:55:02,592 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2021-12-16 23:55:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:55:02,592 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-12-16 23:55:02,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-12-16 23:55:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 23:55:02,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:55:02,593 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:55:02,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 23:55:02,793 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,SelfDestructingSolverStorable13 [2021-12-16 23:55:02,794 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:55:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:55:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2021-12-16 23:55:02,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:55:02,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336471007] [2021-12-16 23:55:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:55:02,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:55:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:55:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:55:06,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:55:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336471007] [2021-12-16 23:55:06,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336471007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:55:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503776478] [2021-12-16 23:55:06,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:55:06,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:55:06,993 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) [2021-12-16 23:55:06,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 23:55:07,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-16 23:55:07,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:55:07,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-16 23:55:07,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:55:07,170 INFO L388 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 15 treesize of output 11 [2021-12-16 23:55:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:55:14,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:55:14,250 INFO L354 Elim1Store]: treesize reduction 48, result has 58.3 percent of original size [2021-12-16 23:55:14,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 87 [2021-12-16 23:55:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:55:14,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:55:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 23:55:25,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503776478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:55:25,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:55:25,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 33, 27] total 113 [2021-12-16 23:55:25,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493734029] [2021-12-16 23:55:25,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:55:25,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-16 23:55:25,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:55:25,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-16 23:55:25,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=12076, Unknown=0, NotChecked=0, Total=12656 [2021-12-16 23:55:25,025 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 113 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:55:35,875 INFO L93 Difference]: Finished difference Result 182 states and 196 transitions. [2021-12-16 23:55:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-16 23:55:35,876 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-16 23:55:35,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:55:35,877 INFO L225 Difference]: With dead ends: 182 [2021-12-16 23:55:35,877 INFO L226 Difference]: Without dead ends: 178 [2021-12-16 23:55:35,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 102 SyntacticMatches, 50 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10926 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1759, Invalid=32281, Unknown=0, NotChecked=0, Total=34040 [2021-12-16 23:55:35,880 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 3496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1780 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:55:35,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 243 Invalid, 3496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1489 Invalid, 0 Unknown, 1780 Unchecked, 1.0s Time] [2021-12-16 23:55:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-16 23:55:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2021-12-16 23:55:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0846153846153845) internal successors, (141), 130 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2021-12-16 23:55:35,894 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 89 [2021-12-16 23:55:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:55:35,895 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2021-12-16 23:55:35,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2021-12-16 23:55:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 23:55:35,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:55:35,900 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:55:35,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 23:55:36,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 23:55:36,119 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:55:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:55:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash -91318780, now seen corresponding path program 13 times [2021-12-16 23:55:36,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:55:36,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087631358] [2021-12-16 23:55:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:55:36,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:55:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:55:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-16 23:55:36,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:55:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087631358] [2021-12-16 23:55:36,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087631358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:55:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443592248] [2021-12-16 23:55:36,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:55:36,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:55:36,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:55:36,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 23:55:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:55:36,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 23:55:36,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:55:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-16 23:55:36,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:55:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-16 23:55:36,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443592248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:55:36,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:55:36,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 23:55:36,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925970797] [2021-12-16 23:55:36,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:55:36,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 23:55:36,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:55:36,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 23:55:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:55:36,667 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:36,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:55:36,945 INFO L93 Difference]: Finished difference Result 313 states and 338 transitions. [2021-12-16 23:55:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 23:55:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-16 23:55:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:55:36,946 INFO L225 Difference]: With dead ends: 313 [2021-12-16 23:55:36,946 INFO L226 Difference]: Without dead ends: 134 [2021-12-16 23:55:36,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-12-16 23:55:36,948 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:55:36,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 76 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:55:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-16 23:55:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-16 23:55:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0833333333333333) internal successors, (143), 132 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-12-16 23:55:36,961 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 91 [2021-12-16 23:55:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:55:36,961 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-12-16 23:55:36,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-12-16 23:55:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 23:55:36,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:55:36,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:55:36,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 23:55:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 23:55:37,168 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:55:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:55:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash 703668518, now seen corresponding path program 14 times [2021-12-16 23:55:37,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:55:37,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9274848] [2021-12-16 23:55:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:55:37,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:55:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:55:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-16 23:55:37,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:55:37,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9274848] [2021-12-16 23:55:37,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9274848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:55:37,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101406174] [2021-12-16 23:55:37,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:55:37,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:55:37,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:55:37,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 23:55:37,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:55:37,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:55:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 23:55:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:55:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-16 23:55:37,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:55:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-16 23:55:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101406174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:55:37,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:55:37,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-16 23:55:37,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553068518] [2021-12-16 23:55:37,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:55:37,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 23:55:37,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:55:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 23:55:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:55:37,768 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:55:38,052 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2021-12-16 23:55:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 23:55:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-16 23:55:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:55:38,053 INFO L225 Difference]: With dead ends: 215 [2021-12-16 23:55:38,053 INFO L226 Difference]: Without dead ends: 110 [2021-12-16 23:55:38,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-12-16 23:55:38,054 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 312 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:55:38,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 26 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:55:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-16 23:55:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-16 23:55:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-12-16 23:55:38,062 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 93 [2021-12-16 23:55:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:55:38,062 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-12-16 23:55:38,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:55:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-12-16 23:55:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 23:55:38,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:55:38,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:55:38,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 23:55:38,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:38,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:55:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:55:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1101361904, now seen corresponding path program 15 times [2021-12-16 23:55:38,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:55:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137773636] [2021-12-16 23:55:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:55:38,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:55:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:55:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:55:45,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:55:45,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137773636] [2021-12-16 23:55:45,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137773636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:55:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380709140] [2021-12-16 23:55:45,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:55:45,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:55:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:55:45,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:55:45,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 23:55:45,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-16 23:55:45,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:55:45,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 172 conjunts are in the unsatisfiable core [2021-12-16 23:55:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:55:45,316 INFO L388 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 15 treesize of output 11 [2021-12-16 23:55:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:55:54,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:55:54,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 109 [2021-12-16 23:55:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 23:55:55,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:56:10,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380709140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:10,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:10,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 36, 31] total 130 [2021-12-16 23:56:10,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863339432] [2021-12-16 23:56:10,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:10,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-12-16 23:56:10,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:10,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-12-16 23:56:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=15770, Unknown=0, NotChecked=0, Total=16770 [2021-12-16 23:56:10,248 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 130 states, 130 states have (on average 2.1538461538461537) internal successors, (280), 130 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:24,943 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2021-12-16 23:56:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-16 23:56:24,944 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.1538461538461537) internal successors, (280), 130 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-16 23:56:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:24,945 INFO L225 Difference]: With dead ends: 181 [2021-12-16 23:56:24,945 INFO L226 Difference]: Without dead ends: 177 [2021-12-16 23:56:24,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 115 SyntacticMatches, 56 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10892 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=2178, Invalid=39642, Unknown=0, NotChecked=0, Total=41820 [2021-12-16 23:56:24,952 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 4123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1582 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:24,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 222 Invalid, 4123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2312 Invalid, 0 Unknown, 1582 Unchecked, 1.4s Time] [2021-12-16 23:56:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-16 23:56:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2021-12-16 23:56:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0731707317073171) internal successors, (176), 164 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2021-12-16 23:56:24,966 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 103 [2021-12-16 23:56:24,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:24,967 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2021-12-16 23:56:24,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.1538461538461537) internal successors, (280), 130 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2021-12-16 23:56:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-16 23:56:24,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:24,968 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:24,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 23:56:25,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 23:56:25,188 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1793599822, now seen corresponding path program 16 times [2021-12-16 23:56:25,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:25,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032840226] [2021-12-16 23:56:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:25,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 23:56:25,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:25,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032840226] [2021-12-16 23:56:25,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032840226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:25,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142912783] [2021-12-16 23:56:25,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:56:25,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:25,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:25,336 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:25,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 23:56:25,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:56:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 23:56:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 23:56:25,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 23:56:25,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142912783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:25,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:25,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-16 23:56:25,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031080317] [2021-12-16 23:56:25,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:25,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 23:56:25,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:25,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 23:56:25,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-12-16 23:56:25,855 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:26,203 INFO L93 Difference]: Finished difference Result 328 states and 350 transitions. [2021-12-16 23:56:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 23:56:26,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-16 23:56:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:26,205 INFO L225 Difference]: With dead ends: 328 [2021-12-16 23:56:26,205 INFO L226 Difference]: Without dead ends: 168 [2021-12-16 23:56:26,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 23:56:26,207 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:26,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 76 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:56:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-16 23:56:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-12-16 23:56:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.072289156626506) internal successors, (178), 166 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2021-12-16 23:56:26,239 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 105 [2021-12-16 23:56:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:26,239 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2021-12-16 23:56:26,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2021-12-16 23:56:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-16 23:56:26,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:26,241 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:26,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-16 23:56:26,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:26,443 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1120878164, now seen corresponding path program 17 times [2021-12-16 23:56:26,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:26,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550525868] [2021-12-16 23:56:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:26,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-16 23:56:26,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:26,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550525868] [2021-12-16 23:56:26,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550525868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:26,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400228778] [2021-12-16 23:56:26,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:56:26,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:26,576 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:26,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 23:56:26,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 23:56:26,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 23:56:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-16 23:56:27,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:56:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-16 23:56:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400228778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:56:27,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:56:27,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2021-12-16 23:56:27,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300904259] [2021-12-16 23:56:27,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:56:27,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 23:56:27,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:56:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 23:56:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 23:56:27,146 INFO L87 Difference]: Start difference. First operand 167 states and 178 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:56:27,504 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2021-12-16 23:56:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 23:56:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-16 23:56:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:56:27,505 INFO L225 Difference]: With dead ends: 245 [2021-12-16 23:56:27,505 INFO L226 Difference]: Without dead ends: 124 [2021-12-16 23:56:27,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 23:56:27,506 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 368 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:56:27,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 57 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:56:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-16 23:56:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-12-16 23:56:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0598290598290598) internal successors, (124), 117 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2021-12-16 23:56:27,514 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2021-12-16 23:56:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:56:27,514 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2021-12-16 23:56:27,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:56:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2021-12-16 23:56:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 23:56:27,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:56:27,515 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:56:27,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 23:56:27,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:27,731 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:56:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:56:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 680376510, now seen corresponding path program 18 times [2021-12-16 23:56:27,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:56:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277934484] [2021-12-16 23:56:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:56:27,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:56:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:56:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 34 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:56:36,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:56:36,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277934484] [2021-12-16 23:56:36,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277934484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:56:36,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029589979] [2021-12-16 23:56:36,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:56:36,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:56:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:56:36,264 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:56:36,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 23:56:36,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-16 23:56:36,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:56:36,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 194 conjunts are in the unsatisfiable core [2021-12-16 23:56:36,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:56:36,553 INFO L388 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 15 treesize of output 11 [2021-12-16 23:56:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:56:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:56:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:56:53,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:56:53,716 INFO L354 Elim1Store]: treesize reduction 464, result has 56.0 percent of original size [2021-12-16 23:56:53,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 33 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 265 treesize of output 630 [2021-12-16 23:57:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 13 proven. 294 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 23:57:02,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 23:57:21,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029589979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:21,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:21,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 38, 35] total 150 [2021-12-16 23:57:21,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631147232] [2021-12-16 23:57:21,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:21,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-12-16 23:57:21,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-12-16 23:57:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1234, Invalid=21116, Unknown=0, NotChecked=0, Total=22350 [2021-12-16 23:57:21,227 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 150 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:47,586 INFO L93 Difference]: Finished difference Result 223 states and 236 transitions. [2021-12-16 23:57:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-16 23:57:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-16 23:57:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:47,587 INFO L225 Difference]: With dead ends: 223 [2021-12-16 23:57:47,587 INFO L226 Difference]: Without dead ends: 219 [2021-12-16 23:57:47,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 130 SyntacticMatches, 65 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 21675 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=4035, Invalid=58715, Unknown=0, NotChecked=0, Total=62750 [2021-12-16 23:57:47,593 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 6378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2823 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:47,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 272 Invalid, 6378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 3144 Invalid, 0 Unknown, 2823 Unchecked, 2.0s Time] [2021-12-16 23:57:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-16 23:57:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2021-12-16 23:57:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0647058823529412) internal successors, (181), 170 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 181 transitions. [2021-12-16 23:57:47,607 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 181 transitions. Word has length 117 [2021-12-16 23:57:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:47,607 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 181 transitions. [2021-12-16 23:57:47,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 181 transitions. [2021-12-16 23:57:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 23:57:47,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:47,608 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:47,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-16 23:57:47,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:47,824 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1060032224, now seen corresponding path program 19 times [2021-12-16 23:57:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:47,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675378594] [2021-12-16 23:57:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:47,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-16 23:57:47,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:47,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675378594] [2021-12-16 23:57:47,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675378594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:47,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627921698] [2021-12-16 23:57:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:57:47,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:47,970 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:47,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 23:57:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:48,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 23:57:48,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-16 23:57:48,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-16 23:57:48,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627921698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:48,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:48,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-16 23:57:48,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180277830] [2021-12-16 23:57:48,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:48,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:57:48,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:57:48,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:57:48,576 INFO L87 Difference]: Start difference. First operand 171 states and 181 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:48,870 INFO L93 Difference]: Finished difference Result 409 states and 434 transitions. [2021-12-16 23:57:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 23:57:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-16 23:57:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:48,880 INFO L225 Difference]: With dead ends: 409 [2021-12-16 23:57:48,880 INFO L226 Difference]: Without dead ends: 174 [2021-12-16 23:57:48,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 23:57:48,881 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:48,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 77 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-16 23:57:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-12-16 23:57:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.063953488372093) internal successors, (183), 172 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 183 transitions. [2021-12-16 23:57:48,895 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 183 transitions. Word has length 119 [2021-12-16 23:57:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:48,895 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 183 transitions. [2021-12-16 23:57:48,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 183 transitions. [2021-12-16 23:57:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 23:57:48,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:48,896 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:48,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-16 23:57:49,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:49,113 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1161769730, now seen corresponding path program 20 times [2021-12-16 23:57:49,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:49,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364752916] [2021-12-16 23:57:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:49,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:57:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-16 23:57:49,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:57:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364752916] [2021-12-16 23:57:49,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364752916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:57:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182462229] [2021-12-16 23:57:49,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:57:49,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:57:49,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:57:49,268 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:57:49,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 23:57:49,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:57:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:57:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 23:57:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:57:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-16 23:57:49,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:57:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-16 23:57:49,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182462229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:57:49,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:57:49,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-12-16 23:57:49,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567209825] [2021-12-16 23:57:49,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:57:49,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 23:57:49,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:57:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 23:57:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-12-16 23:57:49,763 INFO L87 Difference]: Start difference. First operand 173 states and 183 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:57:50,083 INFO L93 Difference]: Finished difference Result 275 states and 295 transitions. [2021-12-16 23:57:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 23:57:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-16 23:57:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:57:50,084 INFO L225 Difference]: With dead ends: 275 [2021-12-16 23:57:50,084 INFO L226 Difference]: Without dead ends: 138 [2021-12-16 23:57:50,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 23:57:50,088 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 364 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:57:50,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 28 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:57:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-16 23:57:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-12-16 23:57:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0534351145038168) internal successors, (138), 131 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2021-12-16 23:57:50,113 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 121 [2021-12-16 23:57:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:57:50,113 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2021-12-16 23:57:50,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:57:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2021-12-16 23:57:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-16 23:57:50,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:57:50,114 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:57:50,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 23:57:50,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-16 23:57:50,334 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:57:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:57:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1125688340, now seen corresponding path program 21 times [2021-12-16 23:57:50,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:57:50,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221892381] [2021-12-16 23:57:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:57:50,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:57:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:58:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 12 proven. 436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:58:01,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:58:01,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221892381] [2021-12-16 23:58:01,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221892381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:58:01,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617375641] [2021-12-16 23:58:01,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:58:01,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:58:01,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:58:01,220 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 23:58:01,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 23:58:01,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-16 23:58:01,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:58:01,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 227 conjunts are in the unsatisfiable core [2021-12-16 23:58:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:58:01,483 INFO L388 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 15 treesize of output 11 [2021-12-16 23:58:01,500 INFO L388 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 15 treesize of output 11 [2021-12-16 23:58:33,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:58:33,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:58:33,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 175 [2021-12-16 23:58:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 9 proven. 423 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 23:58:34,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:58:59,795 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-16 23:58:59,796 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-16 23:58:59,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 23:58:59,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2021-12-16 23:58:59,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360953963] [2021-12-16 23:58:59,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 23:58:59,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-16 23:58:59,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:58:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-16 23:58:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=41914, Unknown=2, NotChecked=0, Total=44310 [2021-12-16 23:58:59,800 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand has 100 states, 100 states have (on average 1.31) internal successors, (131), 100 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:58:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 23:58:59,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 73 SyntacticMatches, 35 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20237 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=2394, Invalid=41914, Unknown=2, NotChecked=0, Total=44310 [2021-12-16 23:58:59,818 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:58:59,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:58:59,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-12-16 23:58:59,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:00,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-16 23:59:00,036 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1b157809 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-16 23:59:00,038 INFO L158 Benchmark]: Toolchain (without parser) took 339334.09ms. Allocated memory was 102.8MB in the beginning and 629.1MB in the end (delta: 526.4MB). Free memory was 73.4MB in the beginning and 480.1MB in the end (delta: -406.7MB). Peak memory consumption was 119.7MB. Max. memory is 16.1GB. [2021-12-16 23:59:00,038 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory was 59.4MB in the beginning and 59.3MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 23:59:00,038 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.01ms. Allocated memory was 102.8MB in the beginning and 144.7MB in the end (delta: 41.9MB). Free memory was 73.2MB in the beginning and 119.5MB in the end (delta: -46.4MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-12-16 23:59:00,038 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.76ms. Allocated memory is still 144.7MB. Free memory was 119.0MB in the beginning and 117.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 23:59:00,038 INFO L158 Benchmark]: Boogie Preprocessor took 32.55ms. Allocated memory is still 144.7MB. Free memory was 117.4MB in the beginning and 116.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 23:59:00,039 INFO L158 Benchmark]: RCFGBuilder took 304.11ms. Allocated memory is still 144.7MB. Free memory was 116.4MB in the beginning and 105.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 23:59:00,039 INFO L158 Benchmark]: TraceAbstraction took 338740.87ms. Allocated memory was 144.7MB in the beginning and 629.1MB in the end (delta: 484.4MB). Free memory was 104.9MB in the beginning and 480.1MB in the end (delta: -375.2MB). Peak memory consumption was 110.2MB. Max. memory is 16.1GB. [2021-12-16 23:59:00,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory was 59.4MB in the beginning and 59.3MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.01ms. Allocated memory was 102.8MB in the beginning and 144.7MB in the end (delta: 41.9MB). Free memory was 73.2MB in the beginning and 119.5MB in the end (delta: -46.4MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.76ms. Allocated memory is still 144.7MB. Free memory was 119.0MB in the beginning and 117.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.55ms. Allocated memory is still 144.7MB. Free memory was 117.4MB in the beginning and 116.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 304.11ms. Allocated memory is still 144.7MB. Free memory was 116.4MB in the beginning and 105.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 338740.87ms. Allocated memory was 144.7MB in the beginning and 629.1MB in the end (delta: 484.4MB). Free memory was 104.9MB in the beginning and 480.1MB in the end (delta: -375.2MB). Peak memory consumption was 110.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1b157809 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1b157809: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/array-crafted/zero_sum3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 23:59:01,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 23:59:01,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 23:59:01,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 23:59:01,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 23:59:01,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 23:59:01,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 23:59:01,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 23:59:01,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 23:59:01,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 23:59:01,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 23:59:01,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 23:59:01,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 23:59:01,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 23:59:01,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 23:59:01,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 23:59:01,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 23:59:01,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 23:59:01,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 23:59:01,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 23:59:01,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 23:59:01,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 23:59:01,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 23:59:01,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 23:59:01,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 23:59:01,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 23:59:01,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 23:59:01,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 23:59:01,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 23:59:01,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 23:59:01,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 23:59:01,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 23:59:01,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 23:59:01,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 23:59:01,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 23:59:01,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 23:59:01,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 23:59:01,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 23:59:01,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 23:59:01,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 23:59:01,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 23:59:01,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-16 23:59:01,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 23:59:01,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 23:59:01,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 23:59:01,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 23:59:01,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 23:59:01,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 23:59:01,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 23:59:01,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 23:59:01,880 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 23:59:01,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 23:59:01,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 23:59:01,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 23:59:01,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 23:59:01,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 23:59:01,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 23:59:01,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 23:59:01,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 23:59:01,882 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 23:59:01,882 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 23:59:01,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 23:59:01,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 23:59:01,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 23:59:01,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 23:59:01,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 23:59:01,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 23:59:01,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 23:59:01,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:59:01,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 23:59:01,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 23:59:01,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 23:59:01,884 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 23:59:01,884 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 23:59:01,884 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 23:59:01,884 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 23:59:01,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 23:59:01,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 23:59:01,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 23:59:01,885 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2021-12-16 23:59:02,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 23:59:02,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 23:59:02,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 23:59:02,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 23:59:02,124 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 23:59:02,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum3.c [2021-12-16 23:59:02,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c044f6b0/f73f1cc6d8a74a1a997416ede7361f47/FLAG00cea509a [2021-12-16 23:59:02,494 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 23:59:02,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.c [2021-12-16 23:59:02,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c044f6b0/f73f1cc6d8a74a1a997416ede7361f47/FLAG00cea509a [2021-12-16 23:59:02,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c044f6b0/f73f1cc6d8a74a1a997416ede7361f47 [2021-12-16 23:59:02,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 23:59:02,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 23:59:02,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 23:59:02,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 23:59:02,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 23:59:02,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:59:02" (1/1) ... [2021-12-16 23:59:02,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@852cf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:02, skipping insertion in model container [2021-12-16 23:59:02,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:59:02" (1/1) ... [2021-12-16 23:59:02,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 23:59:02,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 23:59:03,045 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/array-crafted/zero_sum3.c[400,413] [2021-12-16 23:59:03,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:59:03,062 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 23:59:03,069 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/array-crafted/zero_sum3.c[400,413] [2021-12-16 23:59:03,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:59:03,084 INFO L208 MainTranslator]: Completed translation [2021-12-16 23:59:03,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03 WrapperNode [2021-12-16 23:59:03,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 23:59:03,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 23:59:03,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 23:59:03,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 23:59:03,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,138 INFO L137 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-12-16 23:59:03,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 23:59:03,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 23:59:03,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 23:59:03,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 23:59:03,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 23:59:03,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 23:59:03,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 23:59:03,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 23:59:03,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (1/1) ... [2021-12-16 23:59:03,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:59:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:59:03,200 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) [2021-12-16 23:59:03,219 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 [2021-12-16 23:59:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 23:59:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 23:59:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 23:59:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-16 23:59:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 23:59:03,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 23:59:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-16 23:59:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 23:59:03,310 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 23:59:03,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 23:59:03,523 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 23:59:03,528 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 23:59:03,528 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-16 23:59:03,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:59:03 BoogieIcfgContainer [2021-12-16 23:59:03,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 23:59:03,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 23:59:03,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 23:59:03,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 23:59:03,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 11:59:02" (1/3) ... [2021-12-16 23:59:03,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d41606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:59:03, skipping insertion in model container [2021-12-16 23:59:03,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:59:03" (2/3) ... [2021-12-16 23:59:03,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d41606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:59:03, skipping insertion in model container [2021-12-16 23:59:03,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:59:03" (3/3) ... [2021-12-16 23:59:03,541 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2021-12-16 23:59:03,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 23:59:03,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 23:59:03,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 23:59:03,591 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 [2021-12-16 23:59:03,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 23:59:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 23:59:03,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:03,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:03,609 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-12-16 23:59:03,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:03,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022460167] [2021-12-16 23:59:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:59:03,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:03,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:03,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:03,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 23:59:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 23:59:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:59:03,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 23:59:03,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:03,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022460167] [2021-12-16 23:59:03,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022460167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:59:03,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:59:03,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 23:59:03,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953977666] [2021-12-16 23:59:03,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:59:03,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 23:59:03,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:03,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 23:59:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:59:03,756 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:03,771 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-12-16 23:59:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 23:59:03,772 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 23:59:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:03,777 INFO L225 Difference]: With dead ends: 59 [2021-12-16 23:59:03,777 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 23:59:03,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:59:03,781 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:03,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:59:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 23:59:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-16 23:59:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-16 23:59:03,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-12-16 23:59:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:03,800 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-16 23:59:03,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-16 23:59:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 23:59:03,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:03,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:03,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:04,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:04,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-12-16 23:59:04,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:04,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820959259] [2021-12-16 23:59:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:59:04,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:04,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:04,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:04,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 23:59:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:59:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:59:04,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 23:59:04,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820959259] [2021-12-16 23:59:04,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820959259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:59:04,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:59:04,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 23:59:04,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922061274] [2021-12-16 23:59:04,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:59:04,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 23:59:04,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 23:59:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:59:04,180 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:04,242 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-12-16 23:59:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 23:59:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 23:59:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:04,244 INFO L225 Difference]: With dead ends: 42 [2021-12-16 23:59:04,244 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 23:59:04,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 23:59:04,245 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:04,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:59:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 23:59:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-16 23:59:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-16 23:59:04,254 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2021-12-16 23:59:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-16 23:59:04,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-16 23:59:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 23:59:04,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:04,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:04,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:04,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:04,463 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash -145263842, now seen corresponding path program 1 times [2021-12-16 23:59:04,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:04,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309731430] [2021-12-16 23:59:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:59:04,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:04,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:04,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:04,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 23:59:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:04,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 23:59:04,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:59:04,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 23:59:04,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309731430] [2021-12-16 23:59:04,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309731430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:59:04,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:59:04,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 23:59:04,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956221104] [2021-12-16 23:59:04,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:59:04,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:59:04,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:59:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:59:04,597 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:04,653 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2021-12-16 23:59:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:59:04,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-16 23:59:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:04,655 INFO L225 Difference]: With dead ends: 73 [2021-12-16 23:59:04,655 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 23:59:04,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:59:04,659 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:04,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:59:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 23:59:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-16 23:59:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-16 23:59:04,676 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2021-12-16 23:59:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:04,677 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-16 23:59:04,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-16 23:59:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 23:59:04,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:04,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:04,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:04,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:04,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1250455616, now seen corresponding path program 1 times [2021-12-16 23:59:04,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469195086] [2021-12-16 23:59:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:59:04,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:04,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:04,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:04,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 23:59:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:04,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:59:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:59:05,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:59:05,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469195086] [2021-12-16 23:59:05,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469195086] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:05,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:59:05,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 23:59:05,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421611034] [2021-12-16 23:59:05,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:05,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 23:59:05,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 23:59:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 23:59:05,106 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:05,185 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2021-12-16 23:59:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 23:59:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-16 23:59:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:05,186 INFO L225 Difference]: With dead ends: 75 [2021-12-16 23:59:05,186 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 23:59:05,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 23:59:05,187 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:05,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:59:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 23:59:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-16 23:59:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-12-16 23:59:05,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 23 [2021-12-16 23:59:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:05,191 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-12-16 23:59:05,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-12-16 23:59:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 23:59:05,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:05,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:05,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-16 23:59:05,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:05,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1812138978, now seen corresponding path program 2 times [2021-12-16 23:59:05,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940208825] [2021-12-16 23:59:05,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:59:05,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:05,410 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:05,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 23:59:05,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 23:59:05,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:05,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 23:59:05,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 23:59:05,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 23:59:05,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:05,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940208825] [2021-12-16 23:59:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940208825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:59:05,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:59:05,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 23:59:05,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467172771] [2021-12-16 23:59:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:59:05,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 23:59:05,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 23:59:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:59:05,561 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:05,648 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2021-12-16 23:59:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 23:59:05,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 23:59:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:05,650 INFO L225 Difference]: With dead ends: 70 [2021-12-16 23:59:05,650 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 23:59:05,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 23:59:05,651 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:05,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:59:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 23:59:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-16 23:59:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-16 23:59:05,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2021-12-16 23:59:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:05,655 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-16 23:59:05,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-16 23:59:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 23:59:05,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:05,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:05,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:05,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:05,864 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:05,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:05,865 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 1 times [2021-12-16 23:59:05,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:05,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792550545] [2021-12-16 23:59:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:59:05,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:05,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:05,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:05,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 23:59:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:59:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 23:59:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 23:59:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 23:59:06,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:06,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792550545] [2021-12-16 23:59:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792550545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:06,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:59:06,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-16 23:59:06,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764316569] [2021-12-16 23:59:06,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:06,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 23:59:06,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 23:59:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-12-16 23:59:06,362 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:06,771 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2021-12-16 23:59:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 23:59:06,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-16 23:59:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:06,773 INFO L225 Difference]: With dead ends: 121 [2021-12-16 23:59:06,773 INFO L226 Difference]: Without dead ends: 97 [2021-12-16 23:59:06,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:59:06,774 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:06,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 57 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:59:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-16 23:59:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 48. [2021-12-16 23:59:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-16 23:59:06,780 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-12-16 23:59:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:06,781 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-16 23:59:06,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-16 23:59:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 23:59:06,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:06,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:06,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:06,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:06,992 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 2 times [2021-12-16 23:59:06,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:06,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066634326] [2021-12-16 23:59:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:59:06,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:07,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:07,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 23:59:07,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:59:07,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 23:59:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:07,995 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 23:59:07,996 INFO L388 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 41 treesize of output 21 [2021-12-16 23:59:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:59:08,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:09,008 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-16 23:59:09,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-12-16 23:59:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 23:59:14,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066634326] [2021-12-16 23:59:14,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066634326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:14,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:59:14,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-12-16 23:59:14,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045350417] [2021-12-16 23:59:14,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:14,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 23:59:14,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 23:59:14,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=328, Unknown=1, NotChecked=0, Total=380 [2021-12-16 23:59:14,299 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:16,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 23:59:18,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 23:59:20,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 23:59:22,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 23:59:25,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 23:59:27,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 23:59:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:27,394 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-12-16 23:59:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 23:59:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-16 23:59:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:27,395 INFO L225 Difference]: With dead ends: 84 [2021-12-16 23:59:27,395 INFO L226 Difference]: Without dead ends: 80 [2021-12-16 23:59:27,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=56, Invalid=363, Unknown=1, NotChecked=0, Total=420 [2021-12-16 23:59:27,396 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:27,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 564 Invalid, 6 Unknown, 52 Unchecked, 13.0s Time] [2021-12-16 23:59:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-16 23:59:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-12-16 23:59:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-12-16 23:59:27,401 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-12-16 23:59:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:27,401 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-12-16 23:59:27,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-12-16 23:59:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 23:59:27,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:27,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:27,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 23:59:27,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:27,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 3 times [2021-12-16 23:59:27,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141478964] [2021-12-16 23:59:27,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 23:59:27,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:27,625 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:27,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 23:59:27,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 23:59:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:27,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 23:59:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:59:27,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:59:28,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:28,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141478964] [2021-12-16 23:59:28,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141478964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:28,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:59:28,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-16 23:59:28,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565486746] [2021-12-16 23:59:28,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:28,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 23:59:28,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:28,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 23:59:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-16 23:59:28,120 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:28,585 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2021-12-16 23:59:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 23:59:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 23:59:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:28,586 INFO L225 Difference]: With dead ends: 154 [2021-12-16 23:59:28,586 INFO L226 Difference]: Without dead ends: 94 [2021-12-16 23:59:28,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-12-16 23:59:28,588 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:28,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 62 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 23:59:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-16 23:59:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2021-12-16 23:59:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-12-16 23:59:28,598 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 49 [2021-12-16 23:59:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:28,598 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-12-16 23:59:28,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-12-16 23:59:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 23:59:28,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:28,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:28,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-16 23:59:28,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:28,806 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:28,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1725581382, now seen corresponding path program 4 times [2021-12-16 23:59:28,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:28,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061071085] [2021-12-16 23:59:28,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 23:59:28,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:28,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:28,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:28,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 23:59:28,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 23:59:28,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 23:59:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:59:29,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 23:59:29,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061071085] [2021-12-16 23:59:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061071085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:29,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:59:29,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-16 23:59:29,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104700508] [2021-12-16 23:59:29,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 23:59:29,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 23:59:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-16 23:59:29,227 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:29,487 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2021-12-16 23:59:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 23:59:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 23:59:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:29,488 INFO L225 Difference]: With dead ends: 159 [2021-12-16 23:59:29,489 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 23:59:29,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-12-16 23:59:29,489 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:29,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 23:59:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 23:59:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-12-16 23:59:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-12-16 23:59:29,494 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 49 [2021-12-16 23:59:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:29,494 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-12-16 23:59:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-12-16 23:59:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 23:59:29,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:29,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:29,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-16 23:59:29,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:29,709 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2021-12-16 23:59:29,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261980604] [2021-12-16 23:59:29,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 23:59:29,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:29,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:29,711 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:29,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 23:59:29,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 23:59:29,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 23:59:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:59:29,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 23:59:30,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 23:59:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261980604] [2021-12-16 23:59:30,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261980604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:59:30,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 23:59:30,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-16 23:59:30,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654681877] [2021-12-16 23:59:30,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 23:59:30,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 23:59:30,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 23:59:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 23:59:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 23:59:30,245 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:59:30,589 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2021-12-16 23:59:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 23:59:30,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-16 23:59:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:59:30,590 INFO L225 Difference]: With dead ends: 97 [2021-12-16 23:59:30,590 INFO L226 Difference]: Without dead ends: 69 [2021-12-16 23:59:30,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-12-16 23:59:30,591 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 23:59:30,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 51 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 23:59:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-16 23:59:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-12-16 23:59:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-16 23:59:30,610 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-12-16 23:59:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:59:30,610 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-16 23:59:30,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:59:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-16 23:59:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 23:59:30,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:59:30,612 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:59:30,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-16 23:59:30,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 23:59:30,821 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:59:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:59:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-12-16 23:59:30,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 23:59:30,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857203324] [2021-12-16 23:59:30,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 23:59:30,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 23:59:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 23:59:30,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 23:59:30,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 23:59:41,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-16 23:59:41,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:59:41,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 23:59:41,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:59:42,556 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-16 23:59:42,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 30 [2021-12-16 23:59:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 23:59:42,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:59:50,792 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-16 23:59:50,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 125 [2021-12-17 00:00:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:00:07,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:00:07,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857203324] [2021-12-17 00:00:07,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857203324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:00:07,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:00:07,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-12-17 00:00:07,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955508253] [2021-12-17 00:00:07,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:00:07,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 00:00:07,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:00:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 00:00:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=737, Unknown=3, NotChecked=0, Total=812 [2021-12-17 00:00:07,922 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:10,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:00:15,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:00:20,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:00:22,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:00:24,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:00:27,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 00:00:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:27,709 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-12-17 00:00:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:00:27,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 00:00:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:27,710 INFO L225 Difference]: With dead ends: 108 [2021-12-17 00:00:27,710 INFO L226 Difference]: Without dead ends: 104 [2021-12-17 00:00:27,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=85, Invalid=904, Unknown=3, NotChecked=0, Total=992 [2021-12-17 00:00:27,711 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-12-17 00:00:27,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 199 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1290 Invalid, 6 Unknown, 17 Unchecked, 14.9s Time] [2021-12-17 00:00:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-17 00:00:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2021-12-17 00:00:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-12-17 00:00:27,716 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 61 [2021-12-17 00:00:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:27,716 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-12-17 00:00:27,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-12-17 00:00:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 00:00:27,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:27,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:00:27,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:00:27,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:00:27,944 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2021-12-17 00:00:27,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:00:27,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127652793] [2021-12-17 00:00:27,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:00:27,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:00:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:00:27,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:00:27,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 00:00:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:00:28,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:00:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:00:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 00:00:28,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:00:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 00:00:28,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:00:28,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127652793] [2021-12-17 00:00:28,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127652793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:00:28,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:00:28,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-12-17 00:00:28,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025792960] [2021-12-17 00:00:28,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:00:28,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 00:00:28,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:00:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 00:00:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:00:28,766 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:29,513 INFO L93 Difference]: Finished difference Result 196 states and 218 transitions. [2021-12-17 00:00:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:00:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 00:00:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:29,514 INFO L225 Difference]: With dead ends: 196 [2021-12-17 00:00:29,514 INFO L226 Difference]: Without dead ends: 102 [2021-12-17 00:00:29,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2021-12-17 00:00:29,515 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:00:29,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 105 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:00:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-17 00:00:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-17 00:00:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.12) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2021-12-17 00:00:29,521 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 63 [2021-12-17 00:00:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:29,521 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2021-12-17 00:00:29,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2021-12-17 00:00:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 00:00:29,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:29,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:00:29,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:00:29,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:00:29,722 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2021-12-17 00:00:29,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:00:29,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169223406] [2021-12-17 00:00:29,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:00:29,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:00:29,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:00:29,736 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:00:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 00:00:29,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:00:29,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:00:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:00:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:00:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 00:00:30,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:00:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 00:00:30,461 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:00:30,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169223406] [2021-12-17 00:00:30,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169223406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:00:30,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:00:30,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-17 00:00:30,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955327117] [2021-12-17 00:00:30,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:00:30,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 00:00:30,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:00:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 00:00:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:00:30,462 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:00:31,027 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2021-12-17 00:00:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 00:00:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-17 00:00:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:00:31,028 INFO L225 Difference]: With dead ends: 156 [2021-12-17 00:00:31,028 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 00:00:31,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-17 00:00:31,030 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:00:31,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 72 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:00:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 00:00:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-12-17 00:00:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-17 00:00:31,037 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-12-17 00:00:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:00:31,037 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-17 00:00:31,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:00:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-17 00:00:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 00:00:31,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:00:31,039 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:00:31,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:00:31,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:00:31,249 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:00:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:00:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2021-12-17 00:00:31,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:00:31,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970855190] [2021-12-17 00:00:31,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:00:31,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:00:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:00:31,252 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:00:31,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process Killed by 15