./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label41.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/Problem13_label41.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 cd32d11e922bf190beba4edd20222f6e5b4dfc210b3394b8307f2a4d7f2efc9e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:46:54,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:46:54,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:46:54,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:46:54,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:46:54,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:46:54,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:46:54,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:46:54,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:46:55,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:46:55,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:46:55,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:46:55,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:46:55,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:46:55,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:46:55,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:46:55,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:46:55,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:46:55,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:46:55,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:46:55,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:46:55,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:46:55,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:46:55,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:46:55,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:46:55,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:46:55,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:46:55,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:46:55,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:46:55,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:46:55,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:46:55,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:46:55,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:46:55,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:46:55,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:46:55,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:46:55,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:46:55,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:46:55,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:46:55,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:46:55,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:46:55,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:46:55,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:46:55,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:46:55,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:46:55,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:46:55,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:46:55,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:46:55,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:46:55,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:46:55,093 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:46:55,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:46:55,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:46:55,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:46:55,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:46:55,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:46:55,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:46:55,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:46:55,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:46:55,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:46:55,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:46:55,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:46:55,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:46:55,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:46:55,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:46:55,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:46:55,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:46:55,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:46:55,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:46:55,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:46:55,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:46:55,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:46:55,099 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:46:55,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:46:55,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:46:55,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:46:55,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd32d11e922bf190beba4edd20222f6e5b4dfc210b3394b8307f2a4d7f2efc9e [2021-12-15 22:46:55,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:46:55,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:46:55,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:46:55,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:46:55,403 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:46:55,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label41.c [2021-12-15 22:46:55,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8675f44/d7d54e768a8443e190a164190b20b656/FLAG1caadc543 [2021-12-15 22:46:56,188 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:46:56,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label41.c [2021-12-15 22:46:56,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8675f44/d7d54e768a8443e190a164190b20b656/FLAG1caadc543 [2021-12-15 22:46:56,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc8675f44/d7d54e768a8443e190a164190b20b656 [2021-12-15 22:46:56,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:46:56,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:46:56,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:46:56,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:46:56,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:46:56,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:46:56" (1/1) ... [2021-12-15 22:46:56,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6bca42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:56, skipping insertion in model container [2021-12-15 22:46:56,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:46:56" (1/1) ... [2021-12-15 22:46:56,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:46:56,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:46:56,933 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/Problem13_label41.c[6347,6360] [2021-12-15 22:46:57,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:46:57,728 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:46:57,755 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/Problem13_label41.c[6347,6360] [2021-12-15 22:46:58,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:46:58,235 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:46:58,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58 WrapperNode [2021-12-15 22:46:58,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:46:58,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:46:58,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:46:58,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:46:58,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:58,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:58,929 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 22:46:58,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:46:58,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:46:58,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:46:58,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:46:58,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:58,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:59,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:59,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:59,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:59,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:59,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:59,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:46:59,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:46:59,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:46:59,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:46:59,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (1/1) ... [2021-12-15 22:46:59,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:46:59,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:46:59,721 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) [2021-12-15 22:46:59,745 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 [2021-12-15 22:46:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:46:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:46:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:46:59,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:46:59,843 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:46:59,845 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:47:04,007 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:47:04,025 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:47:04,026 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:47:04,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:04 BoogieIcfgContainer [2021-12-15 22:47:04,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:47:04,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:47:04,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:47:04,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:47:04,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:46:56" (1/3) ... [2021-12-15 22:47:04,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e65e787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:04, skipping insertion in model container [2021-12-15 22:47:04,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:46:58" (2/3) ... [2021-12-15 22:47:04,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e65e787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:47:04, skipping insertion in model container [2021-12-15 22:47:04,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:47:04" (3/3) ... [2021-12-15 22:47:04,040 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label41.c [2021-12-15 22:47:04,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:47:04,044 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:47:04,089 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:47:04,095 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 [2021-12-15 22:47:04,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:47:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-12-15 22:47:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 22:47:04,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:04,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:04,132 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:04,136 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2021-12-15 22:47:04,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:04,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697689643] [2021-12-15 22:47:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:04,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:47:04,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:04,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697689643] [2021-12-15 22:47:04,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697689643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:04,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:04,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:47:04,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380627209] [2021-12-15 22:47:04,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:04,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:04,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:04,395 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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) [2021-12-15 22:47:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:08,967 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-15 22:47:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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 44 [2021-12-15 22:47:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:08,990 INFO L225 Difference]: With dead ends: 3121 [2021-12-15 22:47:08,990 INFO L226 Difference]: Without dead ends: 1944 [2021-12-15 22:47:08,996 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 [2021-12-15 22:47:08,999 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 945 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:09,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 22:47:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-15 22:47:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-15 22:47:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 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) [2021-12-15 22:47:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-15 22:47:09,103 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 44 [2021-12-15 22:47:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:09,103 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-15 22:47:09,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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) [2021-12-15 22:47:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-15 22:47:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 22:47:09,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:09,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:47:09,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:47:09,107 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 511004970, now seen corresponding path program 1 times [2021-12-15 22:47:09,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:09,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215643255] [2021-12-15 22:47:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:09,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:47:09,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:09,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215643255] [2021-12-15 22:47:09,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215643255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:09,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:09,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:09,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658430181] [2021-12-15 22:47:09,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:09,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:47:09,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:09,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:47:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:47:09,293 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-12-15 22:47:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:14,808 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-15 22:47:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:47:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2021-12-15 22:47:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:14,827 INFO L225 Difference]: With dead ends: 6152 [2021-12-15 22:47:14,827 INFO L226 Difference]: Without dead ends: 4281 [2021-12-15 22:47:14,832 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 [2021-12-15 22:47:14,834 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 2626 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:14,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 1019 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-15 22:47:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-15 22:47:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-15 22:47:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4772143024071045) internal successors, (6321), 4279 states have internal predecessors, (6321), 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) [2021-12-15 22:47:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6321 transitions. [2021-12-15 22:47:14,975 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6321 transitions. Word has length 109 [2021-12-15 22:47:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:14,978 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6321 transitions. [2021-12-15 22:47:14,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-12-15 22:47:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6321 transitions. [2021-12-15 22:47:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 22:47:14,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:14,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:14,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:47:14,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash 459734874, now seen corresponding path program 1 times [2021-12-15 22:47:14,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286199557] [2021-12-15 22:47:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:14,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:47:15,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:15,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286199557] [2021-12-15 22:47:15,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286199557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:15,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:15,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:47:15,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098577806] [2021-12-15 22:47:15,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:15,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:15,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:15,238 INFO L87 Difference]: Start difference. First operand 4280 states and 6321 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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) [2021-12-15 22:47:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:18,352 INFO L93 Difference]: Finished difference Result 10955 states and 16961 transitions. [2021-12-15 22:47:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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 211 [2021-12-15 22:47:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:18,384 INFO L225 Difference]: With dead ends: 10955 [2021-12-15 22:47:18,384 INFO L226 Difference]: Without dead ends: 7464 [2021-12-15 22:47:18,393 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 [2021-12-15 22:47:18,399 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 941 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:18,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 868 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:47:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7464 states. [2021-12-15 22:47:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7464 to 7455. [2021-12-15 22:47:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 1.3945532599946338) internal successors, (10395), 7454 states have internal predecessors, (10395), 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) [2021-12-15 22:47:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 10395 transitions. [2021-12-15 22:47:18,542 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 10395 transitions. Word has length 211 [2021-12-15 22:47:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:18,544 INFO L470 AbstractCegarLoop]: Abstraction has 7455 states and 10395 transitions. [2021-12-15 22:47:18,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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) [2021-12-15 22:47:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 10395 transitions. [2021-12-15 22:47:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-15 22:47:18,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:18,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:18,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:47:18,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:18,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2137410665, now seen corresponding path program 1 times [2021-12-15 22:47:18,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:18,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398161349] [2021-12-15 22:47:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:18,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 22:47:18,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398161349] [2021-12-15 22:47:18,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398161349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:18,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:18,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:47:18,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118367251] [2021-12-15 22:47:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:18,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:18,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:18,707 INFO L87 Difference]: Start difference. First operand 7455 states and 10395 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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) [2021-12-15 22:47:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:21,605 INFO L93 Difference]: Finished difference Result 20420 states and 29108 transitions. [2021-12-15 22:47:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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 225 [2021-12-15 22:47:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:21,652 INFO L225 Difference]: With dead ends: 20420 [2021-12-15 22:47:21,652 INFO L226 Difference]: Without dead ends: 13754 [2021-12-15 22:47:21,663 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 [2021-12-15 22:47:21,664 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:21,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 988 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:47:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13754 states. [2021-12-15 22:47:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13754 to 12964. [2021-12-15 22:47:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2915991668595233) internal successors, (16743), 12963 states have internal predecessors, (16743), 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) [2021-12-15 22:47:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16743 transitions. [2021-12-15 22:47:21,915 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16743 transitions. Word has length 225 [2021-12-15 22:47:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:21,916 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16743 transitions. [2021-12-15 22:47:21,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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) [2021-12-15 22:47:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16743 transitions. [2021-12-15 22:47:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-15 22:47:21,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:21,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:47:21,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:47:21,921 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 253132810, now seen corresponding path program 1 times [2021-12-15 22:47:21,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:21,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349548287] [2021-12-15 22:47:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:21,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:47:22,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349548287] [2021-12-15 22:47:22,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349548287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:22,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:22,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:22,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799118325] [2021-12-15 22:47:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:22,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:22,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:22,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:22,051 INFO L87 Difference]: Start difference. First operand 12964 states and 16743 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:25,234 INFO L93 Difference]: Finished difference Result 36960 states and 48179 transitions. [2021-12-15 22:47:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:25,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-12-15 22:47:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:25,281 INFO L225 Difference]: With dead ends: 36960 [2021-12-15 22:47:25,281 INFO L226 Difference]: Without dead ends: 24785 [2021-12-15 22:47:25,295 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 [2021-12-15 22:47:25,296 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 859 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:25,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 907 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 22:47:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24785 states. [2021-12-15 22:47:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24785 to 24775. [2021-12-15 22:47:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24775 states, 24774 states have (on average 1.2223298619520464) internal successors, (30282), 24774 states have internal predecessors, (30282), 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) [2021-12-15 22:47:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24775 states to 24775 states and 30282 transitions. [2021-12-15 22:47:25,711 INFO L78 Accepts]: Start accepts. Automaton has 24775 states and 30282 transitions. Word has length 243 [2021-12-15 22:47:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:25,713 INFO L470 AbstractCegarLoop]: Abstraction has 24775 states and 30282 transitions. [2021-12-15 22:47:25,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 24775 states and 30282 transitions. [2021-12-15 22:47:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-15 22:47:25,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:25,722 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 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] [2021-12-15 22:47:25,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:47:25,722 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2026738478, now seen corresponding path program 1 times [2021-12-15 22:47:25,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324149441] [2021-12-15 22:47:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:25,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 22:47:25,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:25,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324149441] [2021-12-15 22:47:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324149441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:25,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:25,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:25,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286093800] [2021-12-15 22:47:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:25,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:47:25,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:47:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:47:25,873 INFO L87 Difference]: Start difference. First operand 24775 states and 30282 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 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) [2021-12-15 22:47:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:32,091 INFO L93 Difference]: Finished difference Result 74155 states and 91573 transitions. [2021-12-15 22:47:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:47:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 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 [2021-12-15 22:47:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:32,343 INFO L225 Difference]: With dead ends: 74155 [2021-12-15 22:47:32,344 INFO L226 Difference]: Without dead ends: 50169 [2021-12-15 22:47:32,369 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 [2021-12-15 22:47:32,371 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 1745 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6068 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 7253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 6068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:32,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1745 Valid, 698 Invalid, 7253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 6068 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-15 22:47:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50169 states. [2021-12-15 22:47:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50169 to 48475. [2021-12-15 22:47:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48475 states, 48474 states have (on average 1.2085654165119446) internal successors, (58584), 48474 states have internal predecessors, (58584), 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) [2021-12-15 22:47:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48475 states to 48475 states and 58584 transitions. [2021-12-15 22:47:32,929 INFO L78 Accepts]: Start accepts. Automaton has 48475 states and 58584 transitions. Word has length 312 [2021-12-15 22:47:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:32,929 INFO L470 AbstractCegarLoop]: Abstraction has 48475 states and 58584 transitions. [2021-12-15 22:47:32,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 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) [2021-12-15 22:47:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 48475 states and 58584 transitions. [2021-12-15 22:47:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-15 22:47:32,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:32,935 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 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] [2021-12-15 22:47:32,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:47:32,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1403591816, now seen corresponding path program 1 times [2021-12-15 22:47:32,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:32,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370275263] [2021-12-15 22:47:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:32,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 22:47:33,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:33,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370275263] [2021-12-15 22:47:33,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370275263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:33,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:33,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:33,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700943043] [2021-12-15 22:47:33,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:33,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:33,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:33,055 INFO L87 Difference]: Start difference. First operand 48475 states and 58584 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2021-12-15 22:47:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:36,372 INFO L93 Difference]: Finished difference Result 117449 states and 140608 transitions. [2021-12-15 22:47:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 327 [2021-12-15 22:47:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:36,485 INFO L225 Difference]: With dead ends: 117449 [2021-12-15 22:47:36,485 INFO L226 Difference]: Without dead ends: 69763 [2021-12-15 22:47:36,527 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 [2021-12-15 22:47:36,528 INFO L933 BasicCegarLoop]: 1852 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:36,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1994 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:47:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69763 states. [2021-12-15 22:47:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69763 to 68154. [2021-12-15 22:47:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68154 states, 68153 states have (on average 1.1748272269746012) internal successors, (80068), 68153 states have internal predecessors, (80068), 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) [2021-12-15 22:47:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68154 states to 68154 states and 80068 transitions. [2021-12-15 22:47:37,430 INFO L78 Accepts]: Start accepts. Automaton has 68154 states and 80068 transitions. Word has length 327 [2021-12-15 22:47:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:37,431 INFO L470 AbstractCegarLoop]: Abstraction has 68154 states and 80068 transitions. [2021-12-15 22:47:37,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2021-12-15 22:47:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 68154 states and 80068 transitions. [2021-12-15 22:47:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-15 22:47:37,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:37,439 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-15 22:47:37,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:47:37,439 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 171285418, now seen corresponding path program 1 times [2021-12-15 22:47:37,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:37,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452923969] [2021-12-15 22:47:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:37,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 22:47:37,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:37,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452923969] [2021-12-15 22:47:37,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452923969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:37,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:37,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:37,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307641170] [2021-12-15 22:47:37,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:37,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:37,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:47:37,547 INFO L87 Difference]: Start difference. First operand 68154 states and 80068 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:40,819 INFO L93 Difference]: Finished difference Result 141006 states and 164764 transitions. [2021-12-15 22:47:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-12-15 22:47:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:40,948 INFO L225 Difference]: With dead ends: 141006 [2021-12-15 22:47:40,949 INFO L226 Difference]: Without dead ends: 70488 [2021-12-15 22:47:41,005 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 [2021-12-15 22:47:41,006 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 1036 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:41,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1645 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:47:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70488 states. [2021-12-15 22:47:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70488 to 66544. [2021-12-15 22:47:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66544 states, 66543 states have (on average 1.1170821874577341) internal successors, (74334), 66543 states have internal predecessors, (74334), 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) [2021-12-15 22:47:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66544 states to 66544 states and 74334 transitions. [2021-12-15 22:47:41,882 INFO L78 Accepts]: Start accepts. Automaton has 66544 states and 74334 transitions. Word has length 361 [2021-12-15 22:47:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 66544 states and 74334 transitions. [2021-12-15 22:47:41,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:47:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 66544 states and 74334 transitions. [2021-12-15 22:47:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-15 22:47:41,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:41,894 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 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] [2021-12-15 22:47:41,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:47:41,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1927917879, now seen corresponding path program 1 times [2021-12-15 22:47:41,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935862082] [2021-12-15 22:47:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:41,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 255 proven. 110 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 22:47:42,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:42,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935862082] [2021-12-15 22:47:42,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935862082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:47:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383942377] [2021-12-15 22:47:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:42,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:47:42,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:47:42,156 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) [2021-12-15 22:47:42,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:47:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:47:42,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:47:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-15 22:47:43,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:47:43,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383942377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:43,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:47:43,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:47:43,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280346285] [2021-12-15 22:47:43,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:43,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:47:43,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:47:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:47:43,143 INFO L87 Difference]: Start difference. First operand 66544 states and 74334 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-15 22:47:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:47:46,142 INFO L93 Difference]: Finished difference Result 132297 states and 147873 transitions. [2021-12-15 22:47:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:47:46,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 370 [2021-12-15 22:47:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:47:46,254 INFO L225 Difference]: With dead ends: 132297 [2021-12-15 22:47:46,254 INFO L226 Difference]: Without dead ends: 66542 [2021-12-15 22:47:46,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:47:46,452 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:47:46,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:47:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66542 states. [2021-12-15 22:47:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66542 to 66541. [2021-12-15 22:47:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66541 states, 66540 states have (on average 1.092951608055305) internal successors, (72725), 66540 states have internal predecessors, (72725), 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) [2021-12-15 22:47:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66541 states to 66541 states and 72725 transitions. [2021-12-15 22:47:47,130 INFO L78 Accepts]: Start accepts. Automaton has 66541 states and 72725 transitions. Word has length 370 [2021-12-15 22:47:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:47:47,131 INFO L470 AbstractCegarLoop]: Abstraction has 66541 states and 72725 transitions. [2021-12-15 22:47:47,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-15 22:47:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 66541 states and 72725 transitions. [2021-12-15 22:47:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-15 22:47:47,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:47:47,136 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-15 22:47:47,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:47:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:47:47,343 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:47:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:47:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1366551800, now seen corresponding path program 1 times [2021-12-15 22:47:47,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:47:47,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144416296] [2021-12-15 22:47:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:47:47,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:47:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:47:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 22:47:47,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:47:47,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144416296] [2021-12-15 22:47:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144416296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:47:47,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:47:47,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:47:47,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633027896] [2021-12-15 22:47:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:47:47,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:47:47,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:47:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:47:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:47:47,708 INFO L87 Difference]: Start difference. First operand 66541 states and 72725 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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)