./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/eca-rers2012/Problem19_label20.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 981e3791b3b9e818d7e8a5acebc5383a1ff1697fc3109e1899a4ce1c6a11f286 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:05:32,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:05:32,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:05:32,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:05:32,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:05:32,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:05:32,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:05:32,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:05:32,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:05:32,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:05:32,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:05:32,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:05:32,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:05:32,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:05:32,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:05:32,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:05:32,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:05:32,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:05:32,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:05:32,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:05:32,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:05:32,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:05:32,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:05:32,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:05:32,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:05:32,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:05:32,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:05:32,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:05:32,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:05:32,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:05:32,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:05:32,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:05:32,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:05:32,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:05:32,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:05:32,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:05:32,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:05:32,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:05:32,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:05:32,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:05:32,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:05:32,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:05:32,926 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:05:32,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:05:32,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:05:32,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:05:32,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:05:32,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:05:32,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:05:32,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:05:32,930 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:05:32,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:05:32,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:05:32,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:05:32,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:05:32,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:05:32,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:05:32,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:05:32,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:05:32,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:05:32,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:05:32,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:05:32,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:05:32,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:05:32,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:05:32,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:05:32,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:05:32,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:05:32,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:05:32,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:05:32,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:05:32,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:05:32,934 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:05:32,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:05:32,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:05:32,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 981e3791b3b9e818d7e8a5acebc5383a1ff1697fc3109e1899a4ce1c6a11f286 [2021-12-27 23:05:33,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:05:33,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:05:33,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:05:33,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:05:33,238 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:05:33,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label20.c [2021-12-27 23:05:33,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b28b6129b/aefdbe90e247474a9ef4f17c5ef190d3/FLAG02ab6b510 [2021-12-27 23:05:34,035 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:05:34,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label20.c [2021-12-27 23:05:34,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b28b6129b/aefdbe90e247474a9ef4f17c5ef190d3/FLAG02ab6b510 [2021-12-27 23:05:34,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b28b6129b/aefdbe90e247474a9ef4f17c5ef190d3 [2021-12-27 23:05:34,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:05:34,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:05:34,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:05:34,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:05:34,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:05:34,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:05:34" (1/1) ... [2021-12-27 23:05:34,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0d56eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:34, skipping insertion in model container [2021-12-27 23:05:34,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:05:34" (1/1) ... [2021-12-27 23:05:34,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:05:34,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:05:34,745 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/eca-rers2012/Problem19_label20.c[5771,5784] [2021-12-27 23:05:35,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:05:35,590 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:05:35,602 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/eca-rers2012/Problem19_label20.c[5771,5784] [2021-12-27 23:05:36,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:05:36,262 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:05:36,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36 WrapperNode [2021-12-27 23:05:36,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:05:36,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:05:36,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:05:36,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:05:36,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:36,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:37,184 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-27 23:05:37,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:05:37,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:05:37,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:05:37,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:05:37,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:37,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:37,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:37,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:37,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:37,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:38,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:38,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:05:38,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:05:38,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:05:38,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:05:38,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (1/1) ... [2021-12-27 23:05:38,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:05:38,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:05:38,193 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) [2021-12-27 23:05:38,203 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 [2021-12-27 23:05:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:05:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:05:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:05:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:05:38,294 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:05:38,296 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:05:43,480 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:05:43,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:05:43,493 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 23:05:43,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:05:43 BoogieIcfgContainer [2021-12-27 23:05:43,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:05:43,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:05:43,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:05:43,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:05:43,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:05:34" (1/3) ... [2021-12-27 23:05:43,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1fc13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:05:43, skipping insertion in model container [2021-12-27 23:05:43,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:05:36" (2/3) ... [2021-12-27 23:05:43,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1fc13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:05:43, skipping insertion in model container [2021-12-27 23:05:43,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:05:43" (3/3) ... [2021-12-27 23:05:43,501 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label20.c [2021-12-27 23:05:43,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:05:43,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:05:43,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:05:43,555 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 [2021-12-27 23:05:43,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:05:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) [2021-12-27 23:05:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 23:05:43,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:05:43,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:05:43,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:05:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:05:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-12-27 23:05:43,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:05:43,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86460711] [2021-12-27 23:05:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:05:43,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:05:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:05:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:05:43,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:05:43,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86460711] [2021-12-27 23:05:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86460711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:05:43,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:05:43,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:05:43,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283797772] [2021-12-27 23:05:43,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:05:43,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:05:43,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:05:43,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:05:43,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:05:43,871 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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) [2021-12-27 23:05:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:05:49,631 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2021-12-27 23:05:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:05:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 43 [2021-12-27 23:05:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:05:49,659 INFO L225 Difference]: With dead ends: 4919 [2021-12-27 23:05:49,659 INFO L226 Difference]: Without dead ends: 3107 [2021-12-27 23:05:49,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:05:49,668 INFO L933 BasicCegarLoop]: 1276 mSDtfsCounter, 1510 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 5748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-27 23:05:49,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1457 Invalid, 5748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 4638 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-27 23:05:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-12-27 23:05:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2021-12-27 23:05:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.652818035426731) internal successors, (5132), 3105 states have internal predecessors, (5132), 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) [2021-12-27 23:05:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2021-12-27 23:05:49,773 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 43 [2021-12-27 23:05:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:05:49,774 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2021-12-27 23:05:49,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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) [2021-12-27 23:05:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2021-12-27 23:05:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-27 23:05:49,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:05:49,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:05:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:05:49,779 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:05:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:05:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1181766134, now seen corresponding path program 1 times [2021-12-27 23:05:49,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:05:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377663057] [2021-12-27 23:05:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:05:49,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:05:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:05:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:05:49,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:05:49,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377663057] [2021-12-27 23:05:49,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377663057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:05:49,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:05:49,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:05:49,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476231725] [2021-12-27 23:05:49,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:05:49,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:05:49,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:05:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:05:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:05:49,919 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 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) [2021-12-27 23:06:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:06:00,455 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2021-12-27 23:06:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:06:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 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) Word has length 112 [2021-12-27 23:06:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:06:00,501 INFO L225 Difference]: With dead ends: 10391 [2021-12-27 23:06:00,501 INFO L226 Difference]: Without dead ends: 7287 [2021-12-27 23:06:00,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:06:00,509 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 4207 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11122 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 12528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 11122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-27 23:06:00,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4207 Valid, 2104 Invalid, 12528 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1406 Valid, 11122 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-12-27 23:06:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-12-27 23:06:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2021-12-27 23:06:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5214927436074637) internal successors, (11008), 7235 states have internal predecessors, (11008), 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) [2021-12-27 23:06:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11008 transitions. [2021-12-27 23:06:00,622 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11008 transitions. Word has length 112 [2021-12-27 23:06:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:06:00,624 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 11008 transitions. [2021-12-27 23:06:00,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 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) [2021-12-27 23:06:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11008 transitions. [2021-12-27 23:06:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-27 23:06:00,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:06:00,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:06:00,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 23:06:00,633 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:06:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:06:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash -886359095, now seen corresponding path program 1 times [2021-12-27 23:06:00,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:06:00,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851249355] [2021-12-27 23:06:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:00,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:06:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:06:00,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:06:00,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851249355] [2021-12-27 23:06:00,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851249355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:06:00,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:06:00,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:06:00,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665888006] [2021-12-27 23:06:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:06:00,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:06:00,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:06:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:06:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:06:00,909 INFO L87 Difference]: Start difference. First operand 7236 states and 11008 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 3 states have internal predecessors, (278), 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) [2021-12-27 23:06:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:06:06,686 INFO L93 Difference]: Finished difference Result 13136 states and 20668 transitions. [2021-12-27 23:06:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:06:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 3 states have internal predecessors, (278), 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 278 [2021-12-27 23:06:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:06:06,710 INFO L225 Difference]: With dead ends: 13136 [2021-12-27 23:06:06,710 INFO L226 Difference]: Without dead ends: 7236 [2021-12-27 23:06:06,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:06:06,724 INFO L933 BasicCegarLoop]: 1767 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7319 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 7327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-27 23:06:06,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2109 Invalid, 7327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7319 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-27 23:06:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2021-12-27 23:06:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 7236. [2021-12-27 23:06:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5202487906012438) internal successors, (10999), 7235 states have internal predecessors, (10999), 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) [2021-12-27 23:06:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 10999 transitions. [2021-12-27 23:06:06,853 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 10999 transitions. Word has length 278 [2021-12-27 23:06:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:06:06,855 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 10999 transitions. [2021-12-27 23:06:06,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 3 states have internal predecessors, (278), 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) [2021-12-27 23:06:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 10999 transitions. [2021-12-27 23:06:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2021-12-27 23:06:06,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:06:06,864 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:06:06,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:06:06,864 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:06:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:06:06,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2115485552, now seen corresponding path program 1 times [2021-12-27 23:06:06,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:06:06,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813093410] [2021-12-27 23:06:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:06,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:06:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-27 23:06:07,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:06:07,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813093410] [2021-12-27 23:06:07,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813093410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:06:07,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:06:07,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:06:07,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422944925] [2021-12-27 23:06:07,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:06:07,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:06:07,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:06:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:06:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:06:07,162 INFO L87 Difference]: Start difference. First operand 7236 states and 10999 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2021-12-27 23:06:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:06:11,653 INFO L93 Difference]: Finished difference Result 15842 states and 24472 transitions. [2021-12-27 23:06:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:06:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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 595 [2021-12-27 23:06:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:06:11,686 INFO L225 Difference]: With dead ends: 15842 [2021-12-27 23:06:11,686 INFO L226 Difference]: Without dead ends: 9973 [2021-12-27 23:06:11,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:06:11,695 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:06:11,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 754 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-27 23:06:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2021-12-27 23:06:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 9969. [2021-12-27 23:06:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 1.3901484751203852) internal successors, (13857), 9968 states have internal predecessors, (13857), 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) [2021-12-27 23:06:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 13857 transitions. [2021-12-27 23:06:11,839 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 13857 transitions. Word has length 595 [2021-12-27 23:06:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:06:11,840 INFO L470 AbstractCegarLoop]: Abstraction has 9969 states and 13857 transitions. [2021-12-27 23:06:11,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2021-12-27 23:06:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 13857 transitions. [2021-12-27 23:06:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-27 23:06:11,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:06:11,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:06:11,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 23:06:11,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:06:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:06:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1960420425, now seen corresponding path program 1 times [2021-12-27 23:06:11,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:06:11,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300172894] [2021-12-27 23:06:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:11,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:06:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-27 23:06:12,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:06:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300172894] [2021-12-27 23:06:12,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300172894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:06:12,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:06:12,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:06:12,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083651633] [2021-12-27 23:06:12,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:06:12,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:06:12,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:06:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:06:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:06:12,082 INFO L87 Difference]: Start difference. First operand 9969 states and 13857 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2021-12-27 23:06:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:06:18,741 INFO L93 Difference]: Finished difference Result 26933 states and 38507 transitions. [2021-12-27 23:06:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:06:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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 598 [2021-12-27 23:06:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:06:18,773 INFO L225 Difference]: With dead ends: 26933 [2021-12-27 23:06:18,773 INFO L226 Difference]: Without dead ends: 18331 [2021-12-27 23:06:18,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:06:18,784 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 2119 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:06:18,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 982 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-27 23:06:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18331 states. [2021-12-27 23:06:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18331 to 18329. [2021-12-27 23:06:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18329 states, 18328 states have (on average 1.378601047577477) internal successors, (25267), 18328 states have internal predecessors, (25267), 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) [2021-12-27 23:06:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18329 states to 18329 states and 25267 transitions. [2021-12-27 23:06:19,019 INFO L78 Accepts]: Start accepts. Automaton has 18329 states and 25267 transitions. Word has length 598 [2021-12-27 23:06:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:06:19,020 INFO L470 AbstractCegarLoop]: Abstraction has 18329 states and 25267 transitions. [2021-12-27 23:06:19,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2021-12-27 23:06:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 18329 states and 25267 transitions. [2021-12-27 23:06:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2021-12-27 23:06:19,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:06:19,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:06:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 23:06:19,032 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:06:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:06:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1121237306, now seen corresponding path program 1 times [2021-12-27 23:06:19,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:06:19,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607305890] [2021-12-27 23:06:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:19,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:06:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 81 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:06:19,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:06:19,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607305890] [2021-12-27 23:06:19,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607305890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:06:19,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350824391] [2021-12-27 23:06:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:19,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:06:19,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:06:19,504 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) [2021-12-27 23:06:19,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 23:06:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 23:06:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:06:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-27 23:06:20,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:06:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350824391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:06:20,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 23:06:20,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-27 23:06:20,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694644965] [2021-12-27 23:06:20,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:06:20,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:06:20,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:06:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:06:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-27 23:06:20,562 INFO L87 Difference]: Start difference. First operand 18329 states and 25267 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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) [2021-12-27 23:06:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:06:25,899 INFO L93 Difference]: Finished difference Result 51713 states and 72347 transitions. [2021-12-27 23:06:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:06:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 612 [2021-12-27 23:06:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:06:25,961 INFO L225 Difference]: With dead ends: 51713 [2021-12-27 23:06:25,962 INFO L226 Difference]: Without dead ends: 34751 [2021-12-27 23:06:25,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-27 23:06:25,985 INFO L933 BasicCegarLoop]: 1958 mSDtfsCounter, 1678 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4894 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 6011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 4894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:06:25,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1678 Valid, 2065 Invalid, 6011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 4894 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-27 23:06:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34751 states. [2021-12-27 23:06:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34751 to 34728. [2021-12-27 23:06:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34728 states, 34727 states have (on average 1.3551415325251246) internal successors, (47060), 34727 states have internal predecessors, (47060), 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) [2021-12-27 23:06:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34728 states to 34728 states and 47060 transitions. [2021-12-27 23:06:26,408 INFO L78 Accepts]: Start accepts. Automaton has 34728 states and 47060 transitions. Word has length 612 [2021-12-27 23:06:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:06:26,408 INFO L470 AbstractCegarLoop]: Abstraction has 34728 states and 47060 transitions. [2021-12-27 23:06:26,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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) [2021-12-27 23:06:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 34728 states and 47060 transitions. [2021-12-27 23:06:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2021-12-27 23:06:26,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:06:26,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:06:26,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 23:06:26,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-27 23:06:26,651 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:06:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:06:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash -879143974, now seen corresponding path program 1 times [2021-12-27 23:06:26,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:06:26,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790899894] [2021-12-27 23:06:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:26,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:06:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-27 23:06:26,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:06:26,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790899894] [2021-12-27 23:06:26,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790899894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:06:26,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:06:26,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:06:26,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196750888] [2021-12-27 23:06:26,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:06:26,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:06:26,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:06:26,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:06:26,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:06:26,964 INFO L87 Difference]: Start difference. First operand 34728 states and 47060 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2021-12-27 23:06:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:06:31,878 INFO L93 Difference]: Finished difference Result 98323 states and 134131 transitions. [2021-12-27 23:06:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 23:06:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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 619 [2021-12-27 23:06:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:06:31,979 INFO L225 Difference]: With dead ends: 98323 [2021-12-27 23:06:31,979 INFO L226 Difference]: Without dead ends: 64962 [2021-12-27 23:06:32,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 23:06:32,016 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 1356 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4206 mSolverCounterSat, 1424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 4206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-27 23:06:32,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 1695 Invalid, 5630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1424 Valid, 4206 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-27 23:06:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64962 states. [2021-12-27 23:06:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64962 to 62214. [2021-12-27 23:06:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62214 states, 62213 states have (on average 1.2403516949833635) internal successors, (77166), 62213 states have internal predecessors, (77166), 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) [2021-12-27 23:06:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62214 states to 62214 states and 77166 transitions. [2021-12-27 23:06:32,750 INFO L78 Accepts]: Start accepts. Automaton has 62214 states and 77166 transitions. Word has length 619 [2021-12-27 23:06:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:06:32,751 INFO L470 AbstractCegarLoop]: Abstraction has 62214 states and 77166 transitions. [2021-12-27 23:06:32,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2021-12-27 23:06:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 62214 states and 77166 transitions. [2021-12-27 23:06:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-12-27 23:06:32,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:06:32,755 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:06:33,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 23:06:33,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:06:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:06:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash 309181723, now seen corresponding path program 1 times [2021-12-27 23:06:33,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:06:33,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538423139] [2021-12-27 23:06:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:33,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:06:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 154 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:06:33,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:06:33,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538423139] [2021-12-27 23:06:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538423139] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:06:33,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388799635] [2021-12-27 23:06:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:06:33,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:06:33,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:06:33,353 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) [2021-12-27 23:06:33,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 23:06:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:06:33,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 23:06:33,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:06:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-27 23:06:34,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:06:34,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388799635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:06:34,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 23:06:34,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-27 23:06:34,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398415444] [2021-12-27 23:06:34,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:06:34,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 23:06:34,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:06:34,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 23:06:34,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-27 23:06:34,550 INFO L87 Difference]: Start difference. First operand 62214 states and 77166 transitions. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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)