./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label42.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/eca-rers2012/Problem19_label42.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 07b24adb8d1690a690440be2a1429dd427e8718e8ee7383841282dfd2e0d0b82 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:25:13,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:25:13,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:25:13,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:25:13,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:25:13,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:25:13,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:25:13,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:25:13,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:25:13,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:25:13,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:25:13,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:25:13,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:25:13,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:25:13,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:25:13,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:25:13,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:25:13,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:25:13,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:25:13,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:25:13,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:25:13,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:25:13,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:25:13,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:25:13,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:25:13,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:25:13,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:25:13,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:25:13,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:25:13,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:25:13,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:25:13,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:25:13,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:25:13,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:25:13,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:25:13,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:25:13,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:25:13,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:25:13,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:25:13,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:25:13,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:25:13,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:25:13,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:25:13,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:25:13,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:25:13,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:25:13,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:25:13,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:25:13,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:25:13,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:25:13,928 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:25:13,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:25:13,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:25:13,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:25:13,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:25:13,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:25:13,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:25:13,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:25:13,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:25:13,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:25:13,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:25:13,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:25:13,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:25:13,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:25:13,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:25:13,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:25:13,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:25:13,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:25:13,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:25:13,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:25:13,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:25:13,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:25:13,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:25:13,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:25:13,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:25:13,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:25:13,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07b24adb8d1690a690440be2a1429dd427e8718e8ee7383841282dfd2e0d0b82 [2021-12-17 05:25:14,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:25:14,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:25:14,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:25:14,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:25:14,135 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:25:14,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label42.c [2021-12-17 05:25:14,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede78b443/768109b3c5cf4707833c25608bfa3708/FLAG5de58dc78 [2021-12-17 05:25:14,821 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:25:14,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label42.c [2021-12-17 05:25:14,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede78b443/768109b3c5cf4707833c25608bfa3708/FLAG5de58dc78 [2021-12-17 05:25:15,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede78b443/768109b3c5cf4707833c25608bfa3708 [2021-12-17 05:25:15,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:25:15,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:25:15,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:25:15,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:25:15,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:25:15,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:25:15" (1/1) ... [2021-12-17 05:25:15,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73340534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:15, skipping insertion in model container [2021-12-17 05:25:15,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:25:15" (1/1) ... [2021-12-17 05:25:15,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:25:15,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:25:15,539 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_label42.c[1692,1705] [2021-12-17 05:25:16,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:25:16,436 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:25:16,456 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_label42.c[1692,1705] [2021-12-17 05:25:16,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:25:16,993 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:25:16,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16 WrapperNode [2021-12-17 05:25:16,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:25:16,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:25:16,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:25:16,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:25:16,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:17,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:17,644 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-17 05:25:17,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:25:17,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:25:17,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:25:17,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:25:17,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:17,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:17,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:17,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:18,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:18,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:18,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:18,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:25:18,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:25:18,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:25:18,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:25:18,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (1/1) ... [2021-12-17 05:25:18,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:25:18,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:25:18,339 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) [2021-12-17 05:25:18,346 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 [2021-12-17 05:25:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:25:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:25:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:25:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:25:18,426 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:25:18,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:25:23,505 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:25:23,526 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:25:23,526 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:25:23,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:25:23 BoogieIcfgContainer [2021-12-17 05:25:23,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:25:23,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:25:23,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:25:23,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:25:23,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:25:15" (1/3) ... [2021-12-17 05:25:23,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e83216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:25:23, skipping insertion in model container [2021-12-17 05:25:23,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:25:16" (2/3) ... [2021-12-17 05:25:23,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e83216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:25:23, skipping insertion in model container [2021-12-17 05:25:23,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:25:23" (3/3) ... [2021-12-17 05:25:23,537 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label42.c [2021-12-17 05:25:23,543 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:25:23,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 05:25:23,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:25:23,583 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 [2021-12-17 05:25:23,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 05:25:23,610 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) [2021-12-17 05:25:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 05:25:23,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:25:23,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:25:23,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:25:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:25:23,618 INFO L85 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2021-12-17 05:25:23,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:25:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206966798] [2021-12-17 05:25:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:25:23,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:25:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:25:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:25:23,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:25:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206966798] [2021-12-17 05:25:23,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206966798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:25:23,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:25:23,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:25:23,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115886960] [2021-12-17 05:25:23,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:25:23,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:25:23,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:25:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:25:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:25:23,804 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 05:25:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:25:29,761 INFO L93 Difference]: Finished difference Result 4975 states and 9416 transitions. [2021-12-17 05:25:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:25:29,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-12-17 05:25:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:25:29,795 INFO L225 Difference]: With dead ends: 4975 [2021-12-17 05:25:29,796 INFO L226 Difference]: Without dead ends: 3163 [2021-12-17 05:25:29,805 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 [2021-12-17 05:25:29,810 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1537 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:25:29,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1524 Invalid, 5793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 05:25:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-12-17 05:25:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3123. [2021-12-17 05:25:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.6268417680973735) internal successors, (5079), 3122 states have internal predecessors, (5079), 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 05:25:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5079 transitions. [2021-12-17 05:25:29,934 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5079 transitions. Word has length 9 [2021-12-17 05:25:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:25:29,934 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 5079 transitions. [2021-12-17 05:25:29,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 05:25:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5079 transitions. [2021-12-17 05:25:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 05:25:29,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:25:29,937 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 05:25:29,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:25:29,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:25:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:25:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1997341839, now seen corresponding path program 1 times [2021-12-17 05:25:29,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:25:29,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104126693] [2021-12-17 05:25:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:25:29,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:25:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:25:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:25:30,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:25:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104126693] [2021-12-17 05:25:30,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104126693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:25:30,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:25:30,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:25:30,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310849088] [2021-12-17 05:25:30,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:25:30,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:25:30,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:25:30,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:25:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:25:30,082 INFO L87 Difference]: Start difference. First operand 3123 states and 5079 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 05:25:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:25:35,398 INFO L93 Difference]: Finished difference Result 9175 states and 14984 transitions. [2021-12-17 05:25:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:25:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2021-12-17 05:25:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:25:35,416 INFO L225 Difference]: With dead ends: 9175 [2021-12-17 05:25:35,417 INFO L226 Difference]: Without dead ends: 6054 [2021-12-17 05:25:35,424 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 [2021-12-17 05:25:35,425 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1776 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4196 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:25:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 1617 Invalid, 5626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4196 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 05:25:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2021-12-17 05:25:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 6040. [2021-12-17 05:25:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6040 states, 6039 states have (on average 1.4207650273224044) internal successors, (8580), 6039 states have internal predecessors, (8580), 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 05:25:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6040 states to 6040 states and 8580 transitions. [2021-12-17 05:25:35,518 INFO L78 Accepts]: Start accepts. Automaton has 6040 states and 8580 transitions. Word has length 80 [2021-12-17 05:25:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:25:35,520 INFO L470 AbstractCegarLoop]: Abstraction has 6040 states and 8580 transitions. [2021-12-17 05:25:35,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 05:25:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6040 states and 8580 transitions. [2021-12-17 05:25:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 05:25:35,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:25:35,526 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 05:25:35,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:25:35,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:25:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:25:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1872171804, now seen corresponding path program 1 times [2021-12-17 05:25:35,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:25:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026773320] [2021-12-17 05:25:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:25:35,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:25:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:25:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:25:35,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:25:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026773320] [2021-12-17 05:25:35,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026773320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:25:35,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:25:35,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:25:35,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410134808] [2021-12-17 05:25:35,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:25:35,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:25:35,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:25:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:25:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:25:35,618 INFO L87 Difference]: Start difference. First operand 6040 states and 8580 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 05:25:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:25:44,540 INFO L93 Difference]: Finished difference Result 20364 states and 28349 transitions. [2021-12-17 05:25:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:25:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 [2021-12-17 05:25:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:25:44,574 INFO L225 Difference]: With dead ends: 20364 [2021-12-17 05:25:44,574 INFO L226 Difference]: Without dead ends: 14326 [2021-12-17 05:25:44,581 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 [2021-12-17 05:25:44,587 INFO L933 BasicCegarLoop]: 1814 mSDtfsCounter, 4032 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 9665 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4032 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 10959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 9665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:25:44,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4032 Valid, 2178 Invalid, 10959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 9665 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-12-17 05:25:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14326 states. [2021-12-17 05:25:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14326 to 14285. [2021-12-17 05:25:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14285 states, 14284 states have (on average 1.2220666479977598) internal successors, (17456), 14284 states have internal predecessors, (17456), 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 05:25:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 17456 transitions. [2021-12-17 05:25:44,796 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 17456 transitions. Word has length 91 [2021-12-17 05:25:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:25:44,799 INFO L470 AbstractCegarLoop]: Abstraction has 14285 states and 17456 transitions. [2021-12-17 05:25:44,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 05:25:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 17456 transitions. [2021-12-17 05:25:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-17 05:25:44,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:25:44,806 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 05:25:44,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:25:44,806 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:25:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:25:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1338586879, now seen corresponding path program 1 times [2021-12-17 05:25:44,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:25:44,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087933322] [2021-12-17 05:25:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:25:44,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:25:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:25:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:25:44,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:25:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087933322] [2021-12-17 05:25:44,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087933322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:25:44,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:25:44,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:25:44,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754728326] [2021-12-17 05:25:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:25:44,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:25:44,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:25:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:25:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:25:44,952 INFO L87 Difference]: Start difference. First operand 14285 states and 17456 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 05:25:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:25:50,243 INFO L93 Difference]: Finished difference Result 28670 states and 36738 transitions. [2021-12-17 05:25:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:25:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 244 [2021-12-17 05:25:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:25:50,278 INFO L225 Difference]: With dead ends: 28670 [2021-12-17 05:25:50,278 INFO L226 Difference]: Without dead ends: 17117 [2021-12-17 05:25:50,288 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 [2021-12-17 05:25:50,290 INFO L933 BasicCegarLoop]: 3071 mSDtfsCounter, 1486 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4165 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 3250 SdHoareTripleChecker+Invalid, 5806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 4165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:25:50,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 3250 Invalid, 5806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1641 Valid, 4165 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-17 05:25:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17117 states. [2021-12-17 05:25:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17117 to 17050. [2021-12-17 05:25:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17050 states, 17049 states have (on average 1.223356208575283) internal successors, (20857), 17049 states have internal predecessors, (20857), 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 05:25:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17050 states to 17050 states and 20857 transitions. [2021-12-17 05:25:50,543 INFO L78 Accepts]: Start accepts. Automaton has 17050 states and 20857 transitions. Word has length 244 [2021-12-17 05:25:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:25:50,545 INFO L470 AbstractCegarLoop]: Abstraction has 17050 states and 20857 transitions. [2021-12-17 05:25:50,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 05:25:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 17050 states and 20857 transitions. [2021-12-17 05:25:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-17 05:25:50,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:25:50,549 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:25:50,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:25:50,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:25:50,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:25:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 5711172, now seen corresponding path program 1 times [2021-12-17 05:25:50,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:25:50,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839463349] [2021-12-17 05:25:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:25:50,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:25:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:25:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:25:50,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:25:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839463349] [2021-12-17 05:25:50,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839463349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:25:50,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:25:50,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:25:50,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933723669] [2021-12-17 05:25:50,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:25:50,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:25:50,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:25:50,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:25:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:25:50,766 INFO L87 Difference]: Start difference. First operand 17050 states and 20857 transitions. Second operand has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 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 05:25:55,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:25:55,760 INFO L93 Difference]: Finished difference Result 31399 states and 38995 transitions. [2021-12-17 05:25:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:25:55,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 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 312 [2021-12-17 05:25:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:25:55,786 INFO L225 Difference]: With dead ends: 31399 [2021-12-17 05:25:55,787 INFO L226 Difference]: Without dead ends: 17050 [2021-12-17 05:25:55,801 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 [2021-12-17 05:25:55,802 INFO L933 BasicCegarLoop]: 1770 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5715 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 5723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:25:55,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1949 Invalid, 5723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5715 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 05:25:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17050 states. [2021-12-17 05:25:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17050 to 17050. [2021-12-17 05:25:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17050 states, 17049 states have (on average 1.2225937005102938) internal successors, (20844), 17049 states have internal predecessors, (20844), 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 05:25:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17050 states to 17050 states and 20844 transitions. [2021-12-17 05:25:56,078 INFO L78 Accepts]: Start accepts. Automaton has 17050 states and 20844 transitions. Word has length 312 [2021-12-17 05:25:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:25:56,079 INFO L470 AbstractCegarLoop]: Abstraction has 17050 states and 20844 transitions. [2021-12-17 05:25:56,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 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 05:25:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 17050 states and 20844 transitions. [2021-12-17 05:25:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-12-17 05:25:56,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:25:56,088 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:25:56,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 05:25:56,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:25:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:25:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1836750315, now seen corresponding path program 1 times [2021-12-17 05:25:56,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:25:56,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93134723] [2021-12-17 05:25:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:25:56,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:25:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:25:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-17 05:25:56,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:25:56,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93134723] [2021-12-17 05:25:56,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93134723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:25:56,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:25:56,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:25:56,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61254273] [2021-12-17 05:25:56,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:25:56,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:25:56,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:25:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:25:56,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:25:56,319 INFO L87 Difference]: Start difference. First operand 17050 states and 20844 transitions. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 2 states have internal predecessors, (498), 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 05:26:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:26:02,309 INFO L93 Difference]: Finished difference Result 45220 states and 56430 transitions. [2021-12-17 05:26:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:26:02,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 2 states have internal predecessors, (498), 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 564 [2021-12-17 05:26:02,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:26:02,358 INFO L225 Difference]: With dead ends: 45220 [2021-12-17 05:26:02,359 INFO L226 Difference]: Without dead ends: 30902 [2021-12-17 05:26:02,376 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 [2021-12-17 05:26:02,377 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 2113 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 5554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:26:02,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 994 Invalid, 5554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5120 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 05:26:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30902 states. [2021-12-17 05:26:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30902 to 30899. [2021-12-17 05:26:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30899 states, 30898 states have (on average 1.205579649168231) internal successors, (37250), 30898 states have internal predecessors, (37250), 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 05:26:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30899 states to 30899 states and 37250 transitions. [2021-12-17 05:26:02,721 INFO L78 Accepts]: Start accepts. Automaton has 30899 states and 37250 transitions. Word has length 564 [2021-12-17 05:26:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:26:02,722 INFO L470 AbstractCegarLoop]: Abstraction has 30899 states and 37250 transitions. [2021-12-17 05:26:02,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 2 states have internal predecessors, (498), 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 05:26:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 30899 states and 37250 transitions. [2021-12-17 05:26:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2021-12-17 05:26:02,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:26:02,731 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2021-12-17 05:26:02,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 05:26:02,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:26:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:26:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash 57557647, now seen corresponding path program 1 times [2021-12-17 05:26:02,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:26:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536275776] [2021-12-17 05:26:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:02,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:26:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-17 05:26:02,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:26:02,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536275776] [2021-12-17 05:26:02,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536275776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:26:02,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:26:02,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:26:02,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964255198] [2021-12-17 05:26:02,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:26:02,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:26:02,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:26:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:26:02,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:26:02,943 INFO L87 Difference]: Start difference. First operand 30899 states and 37250 transitions. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 05:26:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:26:08,933 INFO L93 Difference]: Finished difference Result 70128 states and 86490 transitions. [2021-12-17 05:26:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:26:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 708 [2021-12-17 05:26:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:26:08,988 INFO L225 Difference]: With dead ends: 70128 [2021-12-17 05:26:08,988 INFO L226 Difference]: Without dead ends: 41961 [2021-12-17 05:26:09,015 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 [2021-12-17 05:26:09,017 INFO L933 BasicCegarLoop]: 3198 mSDtfsCounter, 1467 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 5099 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 5099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:26:09,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 3374 Invalid, 6069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 5099 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 05:26:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41961 states. [2021-12-17 05:26:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41961 to 41873. [2021-12-17 05:26:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41873 states, 41872 states have (on average 1.1846102407336645) internal successors, (49602), 41872 states have internal predecessors, (49602), 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 05:26:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41873 states to 41873 states and 49602 transitions. [2021-12-17 05:26:09,402 INFO L78 Accepts]: Start accepts. Automaton has 41873 states and 49602 transitions. Word has length 708 [2021-12-17 05:26:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:26:09,403 INFO L470 AbstractCegarLoop]: Abstraction has 41873 states and 49602 transitions. [2021-12-17 05:26:09,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 05:26:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 41873 states and 49602 transitions. [2021-12-17 05:26:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2021-12-17 05:26:09,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:26:09,415 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2021-12-17 05:26:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:26:09,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:26:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:26:09,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1042146454, now seen corresponding path program 1 times [2021-12-17 05:26:09,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:26:09,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098964306] [2021-12-17 05:26:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:09,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:26:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 35 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:26:09,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:26:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098964306] [2021-12-17 05:26:09,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098964306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:26:09,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112203128] [2021-12-17 05:26:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:09,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:26:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:26:09,692 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) [2021-12-17 05:26:09,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 05:26:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:09,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:26:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:26:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-17 05:26:10,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:26:10,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112203128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:26:10,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:26:10,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:26:10,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760964072] [2021-12-17 05:26:10,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:26:10,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:26:10,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:26:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:26:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:26:10,747 INFO L87 Difference]: Start difference. First operand 41873 states and 49602 transitions. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 05:26:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:26:16,784 INFO L93 Difference]: Finished difference Result 92060 states and 111190 transitions. [2021-12-17 05:26:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:26:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 715 [2021-12-17 05:26:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:26:16,849 INFO L225 Difference]: With dead ends: 92060 [2021-12-17 05:26:16,849 INFO L226 Difference]: Without dead ends: 52919 [2021-12-17 05:26:16,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 714 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:26:16,879 INFO L933 BasicCegarLoop]: 3068 mSDtfsCounter, 1477 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4987 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 5993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 4987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:26:16,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 3243 Invalid, 5993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 4987 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 05:26:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52919 states. [2021-12-17 05:26:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52919 to 52803. [2021-12-17 05:26:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52803 states, 52802 states have (on average 1.1731373811598045) internal successors, (61944), 52802 states have internal predecessors, (61944), 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 05:26:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52803 states to 52803 states and 61944 transitions. [2021-12-17 05:26:17,344 INFO L78 Accepts]: Start accepts. Automaton has 52803 states and 61944 transitions. Word has length 715 [2021-12-17 05:26:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:26:17,345 INFO L470 AbstractCegarLoop]: Abstraction has 52803 states and 61944 transitions. [2021-12-17 05:26:17,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 05:26:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 52803 states and 61944 transitions. [2021-12-17 05:26:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2021-12-17 05:26:17,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:26:17,353 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-17 05:26:17,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 05:26:17,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:26:17,556 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:26:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:26:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1688666539, now seen corresponding path program 1 times [2021-12-17 05:26:17,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:26:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501904244] [2021-12-17 05:26:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:17,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:26:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 519 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-17 05:26:17,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:26:17,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501904244] [2021-12-17 05:26:17,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501904244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:26:17,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:26:17,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:26:17,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878246342] [2021-12-17 05:26:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:26:17,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:26:17,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:26:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:26:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:26:17,828 INFO L87 Difference]: Start difference. First operand 52803 states and 61944 transitions. Second operand has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 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 05:26:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:26:27,568 INFO L93 Difference]: Finished difference Result 176840 states and 211330 transitions. [2021-12-17 05:26:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:26:27,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 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 916 [2021-12-17 05:26:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:26:27,723 INFO L225 Difference]: With dead ends: 176840 [2021-12-17 05:26:27,723 INFO L226 Difference]: Without dead ends: 126769 [2021-12-17 05:26:27,775 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 [2021-12-17 05:26:27,775 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 3268 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 9156 mSolverCounterSat, 2744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3268 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 11900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2744 IncrementalHoareTripleChecker+Valid, 9156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:26:27,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3268 Valid, 1298 Invalid, 11900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2744 Valid, 9156 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-12-17 05:26:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126769 states. [2021-12-17 05:26:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126769 to 126624. [2021-12-17 05:26:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126624 states, 126623 states have (on average 1.1490961357731218) internal successors, (145502), 126623 states have internal predecessors, (145502), 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 05:26:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126624 states to 126624 states and 145502 transitions. [2021-12-17 05:26:29,453 INFO L78 Accepts]: Start accepts. Automaton has 126624 states and 145502 transitions. Word has length 916 [2021-12-17 05:26:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:26:29,454 INFO L470 AbstractCegarLoop]: Abstraction has 126624 states and 145502 transitions. [2021-12-17 05:26:29,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 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 05:26:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 126624 states and 145502 transitions. [2021-12-17 05:26:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2021-12-17 05:26:29,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:26:29,470 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:26:29,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:26:29,471 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:26:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:26:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1629135950, now seen corresponding path program 1 times [2021-12-17 05:26:29,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:26:29,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481700162] [2021-12-17 05:26:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:29,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:26:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 535 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-17 05:26:30,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:26:30,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481700162] [2021-12-17 05:26:30,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481700162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:26:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288147179] [2021-12-17 05:26:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:30,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:26:30,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:26:30,045 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) [2021-12-17 05:26:30,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 05:26:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:30,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:26:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:26:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2021-12-17 05:26:31,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:26:31,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288147179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:26:31,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:26:31,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:26:31,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856676315] [2021-12-17 05:26:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:26:31,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:26:31,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:26:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:26:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:26:31,335 INFO L87 Difference]: Start difference. First operand 126624 states and 145502 transitions. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 05:26:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:26:38,363 INFO L93 Difference]: Finished difference Result 302439 states and 353243 transitions. [2021-12-17 05:26:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:26:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 966 [2021-12-17 05:26:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:26:38,585 INFO L225 Difference]: With dead ends: 302439 [2021-12-17 05:26:38,585 INFO L226 Difference]: Without dead ends: 178547 [2021-12-17 05:26:38,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:26:38,634 INFO L933 BasicCegarLoop]: 2417 mSDtfsCounter, 1646 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 5183 mSolverCounterSat, 1029 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 6212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1029 IncrementalHoareTripleChecker+Valid, 5183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:26:38,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 2526 Invalid, 6212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1029 Valid, 5183 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-17 05:26:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178547 states. [2021-12-17 05:26:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178547 to 175777. [2021-12-17 05:26:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175777 states, 175776 states have (on average 1.1654492080830148) internal successors, (204858), 175776 states have internal predecessors, (204858), 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 05:26:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175777 states to 175777 states and 204858 transitions. [2021-12-17 05:26:40,796 INFO L78 Accepts]: Start accepts. Automaton has 175777 states and 204858 transitions. Word has length 966 [2021-12-17 05:26:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:26:40,797 INFO L470 AbstractCegarLoop]: Abstraction has 175777 states and 204858 transitions. [2021-12-17 05:26:40,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 05:26:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 175777 states and 204858 transitions. [2021-12-17 05:26:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2021-12-17 05:26:40,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:26:40,809 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 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, 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, 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] [2021-12-17 05:26:40,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 05:26:41,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 05:26:41,016 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:26:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:26:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1879031241, now seen corresponding path program 1 times [2021-12-17 05:26:41,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:26:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557197947] [2021-12-17 05:26:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:41,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:26:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-12-17 05:26:41,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:26:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557197947] [2021-12-17 05:26:41,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557197947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:26:41,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:26:41,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:26:41,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587626743] [2021-12-17 05:26:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:26:41,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:26:41,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:26:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:26:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:26:41,446 INFO L87 Difference]: Start difference. First operand 175777 states and 204858 transitions. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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 05:26:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:26:48,300 INFO L93 Difference]: Finished difference Result 468954 states and 551375 transitions. [2021-12-17 05:26:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:26:48,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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 1005 [2021-12-17 05:26:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:26:48,733 INFO L225 Difference]: With dead ends: 468954 [2021-12-17 05:26:48,734 INFO L226 Difference]: Without dead ends: 295909 [2021-12-17 05:26:48,982 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 [2021-12-17 05:26:48,988 INFO L933 BasicCegarLoop]: 3093 mSDtfsCounter, 1411 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4607 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 5767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 4607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 05:26:48,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 3290 Invalid, 5767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 4607 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 05:26:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295909 states. [2021-12-17 05:26:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295909 to 295895. [2021-12-17 05:26:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295895 states, 295894 states have (on average 1.117224411444639) internal successors, (330580), 295894 states have internal predecessors, (330580), 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 05:26:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295895 states to 295895 states and 330580 transitions. [2021-12-17 05:26:52,486 INFO L78 Accepts]: Start accepts. Automaton has 295895 states and 330580 transitions. Word has length 1005 [2021-12-17 05:26:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:26:52,487 INFO L470 AbstractCegarLoop]: Abstraction has 295895 states and 330580 transitions. [2021-12-17 05:26:52,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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 05:26:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 295895 states and 330580 transitions. [2021-12-17 05:26:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1057 [2021-12-17 05:26:52,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:26:52,503 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:26:52,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 05:26:52,504 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:26:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:26:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash 388249459, now seen corresponding path program 1 times [2021-12-17 05:26:52,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:26:52,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707701708] [2021-12-17 05:26:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:52,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:26:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 714 proven. 196 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-17 05:26:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:26:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707701708] [2021-12-17 05:26:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707701708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:26:53,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984046571] [2021-12-17 05:26:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:26:53,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:26:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:26:53,095 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) [2021-12-17 05:26:53,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 05:26:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:26:53,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:26:53,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:26:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 880 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-17 05:26:54,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:26:54,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984046571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:26:54,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:26:54,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:26:54,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924252891] [2021-12-17 05:26:54,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:26:54,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:26:54,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:26:54,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:26:54,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:26:54,389 INFO L87 Difference]: Start difference. First operand 295895 states and 330580 transitions. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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 05:27:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:27:01,456 INFO L93 Difference]: Finished difference Result 699599 states and 790553 transitions. [2021-12-17 05:27:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:27:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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 1056 [2021-12-17 05:27:01,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:27:02,225 INFO L225 Difference]: With dead ends: 699599 [2021-12-17 05:27:02,225 INFO L226 Difference]: Without dead ends: 390047 [2021-12-17 05:27:02,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 1055 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:27:02,326 INFO L933 BasicCegarLoop]: 2613 mSDtfsCounter, 1544 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 2105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 5902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2105 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:27:02,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 2707 Invalid, 5902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2105 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 05:27:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390047 states. [2021-12-17 05:27:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390047 to 376384. [2021-12-17 05:27:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376384 states, 376383 states have (on average 1.1126698070848047) internal successors, (418790), 376383 states have internal predecessors, (418790), 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 05:27:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376384 states to 376384 states and 418790 transitions. [2021-12-17 05:27:06,856 INFO L78 Accepts]: Start accepts. Automaton has 376384 states and 418790 transitions. Word has length 1056 [2021-12-17 05:27:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:27:06,857 INFO L470 AbstractCegarLoop]: Abstraction has 376384 states and 418790 transitions. [2021-12-17 05:27:06,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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 05:27:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 376384 states and 418790 transitions. [2021-12-17 05:27:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2021-12-17 05:27:06,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:27:06,875 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:27:06,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 05:27:07,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:27:07,088 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:27:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:27:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash -86725816, now seen corresponding path program 1 times [2021-12-17 05:27:07,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:27:07,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624950070] [2021-12-17 05:27:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:27:07,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:27:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:27:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 759 proven. 539 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-17 05:27:07,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:27:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624950070] [2021-12-17 05:27:07,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624950070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:27:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567179997] [2021-12-17 05:27:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:27:07,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:27:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:27:07,507 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) [2021-12-17 05:27:07,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 05:27:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:27:07,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:27:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:27:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 932 proven. 0 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-12-17 05:27:09,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:27:09,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567179997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:27:09,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:27:09,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 05:27:09,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312387200] [2021-12-17 05:27:09,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:27:09,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:27:09,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:27:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:27:09,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:27:09,103 INFO L87 Difference]: Start difference. First operand 376384 states and 418790 transitions. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 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 05:27:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:27:15,671 INFO L93 Difference]: Finished difference Result 853791 states and 951494 transitions. [2021-12-17 05:27:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:27:15,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 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 1125 [2021-12-17 05:27:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:27:16,732 INFO L225 Difference]: With dead ends: 853791 [2021-12-17 05:27:16,732 INFO L226 Difference]: Without dead ends: 478774 [2021-12-17 05:27:16,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1129 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:27:16,917 INFO L933 BasicCegarLoop]: 2793 mSDtfsCounter, 1447 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 3752 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 5186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 3752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:27:16,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 2937 Invalid, 5186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 3752 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-17 05:27:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478774 states. [2021-12-17 05:27:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478774 to 473297. [2021-12-17 05:27:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473297 states, 473296 states have (on average 1.107157043372435) internal successors, (524013), 473296 states have internal predecessors, (524013), 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)