./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem11_label02.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 30f62f9fddfecd916215dd8f1b75b140359bb989ba38a829add2eea4e4b271dc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:57:57,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:57:57,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:57:57,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:57:57,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:57:57,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:57:57,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:57:57,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:57:57,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:57:57,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:57:58,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:57:58,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:57:58,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:57:58,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:57:58,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:57:58,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:57:58,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:57:58,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:57:58,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:57:58,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:57:58,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:57:58,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:57:58,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:57:58,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:57:58,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:57:58,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:57:58,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:57:58,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:57:58,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:57:58,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:57:58,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:57:58,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:57:58,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:57:58,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:57:58,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:57:58,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:57:58,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:57:58,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:57:58,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:57:58,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:57:58,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:57:58,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:57:58,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:57:58,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:57:58,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:57:58,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:57:58,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:57:58,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:57:58,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:57:58,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:57:58,060 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:57:58,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:57:58,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:57:58,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:57:58,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:57:58,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:57:58,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:57:58,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:57:58,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:57:58,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:57:58,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:57:58,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:57:58,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:57:58,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:57:58,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:57:58,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:57:58,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:57:58,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:57:58,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:57:58,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:57:58,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:57:58,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:57:58,063 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:57:58,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:57:58,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:57:58,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:57:58,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30f62f9fddfecd916215dd8f1b75b140359bb989ba38a829add2eea4e4b271dc [2021-12-21 10:57:58,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:57:58,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:57:58,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:57:58,250 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:57:58,250 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:57:58,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label02.c [2021-12-21 10:57:58,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba864428/4046aa274daf480cbc261d8b6b01779e/FLAG43d94c987 [2021-12-21 10:57:58,725 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:57:58,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label02.c [2021-12-21 10:57:58,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba864428/4046aa274daf480cbc261d8b6b01779e/FLAG43d94c987 [2021-12-21 10:57:59,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba864428/4046aa274daf480cbc261d8b6b01779e [2021-12-21 10:57:59,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:57:59,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:57:59,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:57:59,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:57:59,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:57:59,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6cd167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59, skipping insertion in model container [2021-12-21 10:57:59,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:57:59,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:57:59,327 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/Problem11_label02.c[7865,7878] [2021-12-21 10:57:59,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:57:59,454 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:57:59,470 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/Problem11_label02.c[7865,7878] [2021-12-21 10:57:59,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:57:59,598 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:57:59,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59 WrapperNode [2021-12-21 10:57:59,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:57:59,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:57:59,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:57:59,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:57:59,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,730 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-21 10:57:59,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:57:59,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:57:59,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:57:59,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:57:59,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:57:59,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:57:59,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:57:59,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:57:59,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (1/1) ... [2021-12-21 10:57:59,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:57:59,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:57:59,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:57:59,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:57:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:57:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:57:59,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:57:59,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:58:00,005 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:58:00,006 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:58:01,022 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:58:01,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:58:01,028 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:58:01,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:58:01 BoogieIcfgContainer [2021-12-21 10:58:01,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:58:01,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:58:01,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:58:01,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:58:01,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:57:59" (1/3) ... [2021-12-21 10:58:01,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55146958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:58:01, skipping insertion in model container [2021-12-21 10:58:01,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:57:59" (2/3) ... [2021-12-21 10:58:01,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55146958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:58:01, skipping insertion in model container [2021-12-21 10:58:01,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:58:01" (3/3) ... [2021-12-21 10:58:01,035 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label02.c [2021-12-21 10:58:01,038 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:58:01,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:58:01,066 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:58:01,070 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:58:01,071 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:58:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:58:01,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:01,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:01,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-12-21 10:58:01,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:01,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175978585] [2021-12-21 10:58:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:01,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:01,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:01,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175978585] [2021-12-21 10:58:01,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175978585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:01,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:01,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:01,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576295470] [2021-12-21 10:58:01,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:01,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:01,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:01,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:01,287 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:02,139 INFO L93 Difference]: Finished difference Result 769 states and 1360 transitions. [2021-12-21 10:58:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-21 10:58:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:02,157 INFO L225 Difference]: With dead ends: 769 [2021-12-21 10:58:02,157 INFO L226 Difference]: Without dead ends: 422 [2021-12-21 10:58:02,163 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 [2021-12-21 10:58:02,167 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 186 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:02,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-21 10:58:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2021-12-21 10:58:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions. [2021-12-21 10:58:02,211 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 54 [2021-12-21 10:58:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:02,212 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 626 transitions. [2021-12-21 10:58:02,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:02,212 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions. [2021-12-21 10:58:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-21 10:58:02,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:02,215 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, 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] [2021-12-21 10:58:02,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:58:02,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash 808427271, now seen corresponding path program 1 times [2021-12-21 10:58:02,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:02,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313561542] [2021-12-21 10:58:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:02,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:02,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:02,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313561542] [2021-12-21 10:58:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313561542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:02,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:02,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186089765] [2021-12-21 10:58:02,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:02,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:02,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:02,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:02,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:02,315 INFO L87 Difference]: Start difference. First operand 412 states and 626 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:02,873 INFO L93 Difference]: Finished difference Result 1194 states and 1821 transitions. [2021-12-21 10:58:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-21 10:58:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:02,877 INFO L225 Difference]: With dead ends: 1194 [2021-12-21 10:58:02,877 INFO L226 Difference]: Without dead ends: 784 [2021-12-21 10:58:02,880 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 [2021-12-21 10:58:02,882 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:02,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-21 10:58:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2021-12-21 10:58:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions. [2021-12-21 10:58:02,913 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 120 [2021-12-21 10:58:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:02,915 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions. [2021-12-21 10:58:02,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions. [2021-12-21 10:58:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 10:58:02,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:02,924 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, 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] [2021-12-21 10:58:02,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:58:02,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1746590275, now seen corresponding path program 1 times [2021-12-21 10:58:02,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:02,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160993001] [2021-12-21 10:58:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:02,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:03,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:03,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160993001] [2021-12-21 10:58:03,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160993001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:03,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:03,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:03,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826573931] [2021-12-21 10:58:03,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:03,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:03,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:03,041 INFO L87 Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:03,568 INFO L93 Difference]: Finished difference Result 1936 states and 2599 transitions. [2021-12-21 10:58:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-21 10:58:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:03,572 INFO L225 Difference]: With dead ends: 1936 [2021-12-21 10:58:03,572 INFO L226 Difference]: Without dead ends: 1154 [2021-12-21 10:58:03,573 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 [2021-12-21 10:58:03,573 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:03,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-12-21 10:58:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2021-12-21 10:58:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions. [2021-12-21 10:58:03,588 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 124 [2021-12-21 10:58:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:03,588 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions. [2021-12-21 10:58:03,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions. [2021-12-21 10:58:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 10:58:03,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:03,589 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:03,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:58:03,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -948152282, now seen corresponding path program 1 times [2021-12-21 10:58:03,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:03,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119744612] [2021-12-21 10:58:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:03,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-21 10:58:03,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:03,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119744612] [2021-12-21 10:58:03,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119744612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:03,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:03,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:03,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547067465] [2021-12-21 10:58:03,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:03,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:03,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:03,725 INFO L87 Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:04,470 INFO L93 Difference]: Finished difference Result 2494 states and 3189 transitions. [2021-12-21 10:58:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 166 [2021-12-21 10:58:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:04,474 INFO L225 Difference]: With dead ends: 2494 [2021-12-21 10:58:04,474 INFO L226 Difference]: Without dead ends: 1527 [2021-12-21 10:58:04,475 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 [2021-12-21 10:58:04,476 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 106 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:04,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 154 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:58:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-12-21 10:58:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1526. [2021-12-21 10:58:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 1.2557377049180327) internal successors, (1915), 1525 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 1915 transitions. [2021-12-21 10:58:04,493 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 1915 transitions. Word has length 166 [2021-12-21 10:58:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:04,494 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 1915 transitions. [2021-12-21 10:58:04,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 1915 transitions. [2021-12-21 10:58:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-21 10:58:04,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:04,496 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:04,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:58:04,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash -728761857, now seen corresponding path program 1 times [2021-12-21 10:58:04,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:04,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471555783] [2021-12-21 10:58:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:04,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:04,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471555783] [2021-12-21 10:58:04,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471555783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:04,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:04,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:04,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224246802] [2021-12-21 10:58:04,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:04,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:04,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:04,558 INFO L87 Difference]: Start difference. First operand 1526 states and 1915 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:05,096 INFO L93 Difference]: Finished difference Result 2864 states and 3636 transitions. [2021-12-21 10:58:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-12-21 10:58:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:05,100 INFO L225 Difference]: With dead ends: 2864 [2021-12-21 10:58:05,100 INFO L226 Difference]: Without dead ends: 1524 [2021-12-21 10:58:05,102 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 [2021-12-21 10:58:05,102 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 181 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:05,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 306 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-12-21 10:58:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1524. [2021-12-21 10:58:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 1.2107682206172028) internal successors, (1844), 1523 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 1844 transitions. [2021-12-21 10:58:05,121 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 1844 transitions. Word has length 181 [2021-12-21 10:58:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:05,122 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 1844 transitions. [2021-12-21 10:58:05,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 1844 transitions. [2021-12-21 10:58:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-21 10:58:05,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:05,124 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:05,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:58:05,125 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:05,125 INFO L85 PathProgramCache]: Analyzing trace with hash -845047207, now seen corresponding path program 1 times [2021-12-21 10:58:05,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:05,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464357493] [2021-12-21 10:58:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:05,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-21 10:58:05,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464357493] [2021-12-21 10:58:05,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464357493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:05,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:05,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:05,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892862866] [2021-12-21 10:58:05,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:05,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:05,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:05,206 INFO L87 Difference]: Start difference. First operand 1524 states and 1844 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:05,800 INFO L93 Difference]: Finished difference Result 3603 states and 4427 transitions. [2021-12-21 10:58:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 236 [2021-12-21 10:58:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:05,806 INFO L225 Difference]: With dead ends: 3603 [2021-12-21 10:58:05,807 INFO L226 Difference]: Without dead ends: 2265 [2021-12-21 10:58:05,808 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 [2021-12-21 10:58:05,810 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 143 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:05,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 386 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-12-21 10:58:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2076. [2021-12-21 10:58:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 1.192289156626506) internal successors, (2474), 2075 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2474 transitions. [2021-12-21 10:58:05,837 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2474 transitions. Word has length 236 [2021-12-21 10:58:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:05,837 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 2474 transitions. [2021-12-21 10:58:05,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2474 transitions. [2021-12-21 10:58:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-21 10:58:05,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:05,840 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:05,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:58:05,840 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1327280490, now seen corresponding path program 1 times [2021-12-21 10:58:05,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:05,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268396056] [2021-12-21 10:58:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:05,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 10:58:05,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268396056] [2021-12-21 10:58:05,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268396056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:05,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:05,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:05,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558418579] [2021-12-21 10:58:05,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:05,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:05,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:05,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:05,962 INFO L87 Difference]: Start difference. First operand 2076 states and 2474 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:06,779 INFO L93 Difference]: Finished difference Result 4890 states and 5877 transitions. [2021-12-21 10:58:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 242 [2021-12-21 10:58:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:06,786 INFO L225 Difference]: With dead ends: 4890 [2021-12-21 10:58:06,786 INFO L226 Difference]: Without dead ends: 2816 [2021-12-21 10:58:06,788 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 [2021-12-21 10:58:06,789 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 142 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:06,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 387 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2021-12-21 10:58:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2811. [2021-12-21 10:58:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 2810 states have (on average 1.1736654804270463) internal successors, (3298), 2810 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 3298 transitions. [2021-12-21 10:58:06,822 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 3298 transitions. Word has length 242 [2021-12-21 10:58:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:06,822 INFO L470 AbstractCegarLoop]: Abstraction has 2811 states and 3298 transitions. [2021-12-21 10:58:06,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 3298 transitions. [2021-12-21 10:58:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-21 10:58:06,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:06,825 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:06,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:58:06,826 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1752037152, now seen corresponding path program 1 times [2021-12-21 10:58:06,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:06,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314673213] [2021-12-21 10:58:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:06,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:06,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:06,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314673213] [2021-12-21 10:58:06,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314673213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:06,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:06,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:06,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881955015] [2021-12-21 10:58:06,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:06,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:06,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:06,958 INFO L87 Difference]: Start difference. First operand 2811 states and 3298 transitions. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:08,145 INFO L93 Difference]: Finished difference Result 8956 states and 10588 transitions. [2021-12-21 10:58:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 281 [2021-12-21 10:58:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:08,162 INFO L225 Difference]: With dead ends: 8956 [2021-12-21 10:58:08,162 INFO L226 Difference]: Without dead ends: 6147 [2021-12-21 10:58:08,165 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 [2021-12-21 10:58:08,166 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 285 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:08,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 78 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 10:58:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6147 states. [2021-12-21 10:58:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 5961. [2021-12-21 10:58:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5961 states, 5960 states have (on average 1.1758389261744966) internal successors, (7008), 5960 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5961 states to 5961 states and 7008 transitions. [2021-12-21 10:58:08,264 INFO L78 Accepts]: Start accepts. Automaton has 5961 states and 7008 transitions. Word has length 281 [2021-12-21 10:58:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:08,265 INFO L470 AbstractCegarLoop]: Abstraction has 5961 states and 7008 transitions. [2021-12-21 10:58:08,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5961 states and 7008 transitions. [2021-12-21 10:58:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-12-21 10:58:08,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:08,287 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:08,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:58:08,287 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1184279150, now seen corresponding path program 1 times [2021-12-21 10:58:08,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:08,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73053195] [2021-12-21 10:58:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:08,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-21 10:58:08,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:08,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73053195] [2021-12-21 10:58:08,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73053195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:08,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:08,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:08,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212050954] [2021-12-21 10:58:08,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:08,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:08,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:08,454 INFO L87 Difference]: Start difference. First operand 5961 states and 7008 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:08,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:08,935 INFO L93 Difference]: Finished difference Result 12099 states and 14259 transitions. [2021-12-21 10:58:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 319 [2021-12-21 10:58:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:08,953 INFO L225 Difference]: With dead ends: 12099 [2021-12-21 10:58:08,953 INFO L226 Difference]: Without dead ends: 7248 [2021-12-21 10:58:08,958 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 [2021-12-21 10:58:08,959 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 168 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:08,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 146 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:58:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7248 states. [2021-12-21 10:58:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 4664. [2021-12-21 10:58:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 1.1799270855672315) internal successors, (5502), 4663 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 5502 transitions. [2021-12-21 10:58:09,075 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 5502 transitions. Word has length 319 [2021-12-21 10:58:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:09,075 INFO L470 AbstractCegarLoop]: Abstraction has 4664 states and 5502 transitions. [2021-12-21 10:58:09,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 5502 transitions. [2021-12-21 10:58:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-21 10:58:09,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:09,081 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:58:09,081 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1130496183, now seen corresponding path program 1 times [2021-12-21 10:58:09,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039994954] [2021-12-21 10:58:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:09,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:09,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039994954] [2021-12-21 10:58:09,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039994954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699795751] [2021-12-21 10:58:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:09,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:09,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:09,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:09,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:58:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 10:58:09,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:10,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:58:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:12,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699795751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:58:12,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:58:12,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 10:58:12,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411279268] [2021-12-21 10:58:12,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:58:12,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:58:12,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:58:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:12,935 INFO L87 Difference]: Start difference. First operand 4664 states and 5502 transitions. Second operand has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:15,014 INFO L93 Difference]: Finished difference Result 12185 states and 14338 transitions. [2021-12-21 10:58:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 10:58:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 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 328 [2021-12-21 10:58:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:15,035 INFO L225 Difference]: With dead ends: 12185 [2021-12-21 10:58:15,036 INFO L226 Difference]: Without dead ends: 7891 [2021-12-21 10:58:15,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 651 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:58:15,040 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1009 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:15,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 185 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-21 10:58:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7891 states. [2021-12-21 10:58:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7891 to 4477. [2021-12-21 10:58:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 1.1735924932975872) internal successors, (5253), 4476 states have internal predecessors, (5253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 5253 transitions. [2021-12-21 10:58:15,110 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 5253 transitions. Word has length 328 [2021-12-21 10:58:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:15,111 INFO L470 AbstractCegarLoop]: Abstraction has 4477 states and 5253 transitions. [2021-12-21 10:58:15,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.5) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 5253 transitions. [2021-12-21 10:58:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-21 10:58:15,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:15,116 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, 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, 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] [2021-12-21 10:58:15,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 10:58:15,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 10:58:15,337 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1345956964, now seen corresponding path program 1 times [2021-12-21 10:58:15,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:15,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119641301] [2021-12-21 10:58:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:15,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 188 proven. 148 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-21 10:58:15,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119641301] [2021-12-21 10:58:15,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119641301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:15,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387664943] [2021-12-21 10:58:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:15,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:15,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:15,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:15,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:58:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-21 10:58:16,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:16,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387664943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:16,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:16,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-21 10:58:16,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864640127] [2021-12-21 10:58:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:16,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:16,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:58:16,152 INFO L87 Difference]: Start difference. First operand 4477 states and 5253 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:16,639 INFO L93 Difference]: Finished difference Result 8778 states and 10330 transitions. [2021-12-21 10:58:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 348 [2021-12-21 10:58:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:16,653 INFO L225 Difference]: With dead ends: 8778 [2021-12-21 10:58:16,653 INFO L226 Difference]: Without dead ends: 4671 [2021-12-21 10:58:16,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:58:16,658 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 103 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:16,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 324 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2021-12-21 10:58:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4477. [2021-12-21 10:58:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 1.1427613941018766) internal successors, (5115), 4476 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 5115 transitions. [2021-12-21 10:58:16,705 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 5115 transitions. Word has length 348 [2021-12-21 10:58:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:16,706 INFO L470 AbstractCegarLoop]: Abstraction has 4477 states and 5115 transitions. [2021-12-21 10:58:16,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 5115 transitions. [2021-12-21 10:58:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-12-21 10:58:16,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:16,713 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:16,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 10:58:16,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 10:58:16,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash -87231958, now seen corresponding path program 1 times [2021-12-21 10:58:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:16,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640215] [2021-12-21 10:58:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:16,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:17,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640215] [2021-12-21 10:58:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:17,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:17,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:17,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007267981] [2021-12-21 10:58:17,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:17,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:17,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:17,063 INFO L87 Difference]: Start difference. First operand 4477 states and 5115 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:17,612 INFO L93 Difference]: Finished difference Result 11713 states and 13473 transitions. [2021-12-21 10:58:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 356 [2021-12-21 10:58:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:17,622 INFO L225 Difference]: With dead ends: 11713 [2021-12-21 10:58:17,622 INFO L226 Difference]: Without dead ends: 7606 [2021-12-21 10:58:17,626 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 [2021-12-21 10:58:17,627 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:17,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 70 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2021-12-21 10:58:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 7601. [2021-12-21 10:58:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7601 states, 7600 states have (on average 1.137763157894737) internal successors, (8647), 7600 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7601 states to 7601 states and 8647 transitions. [2021-12-21 10:58:17,694 INFO L78 Accepts]: Start accepts. Automaton has 7601 states and 8647 transitions. Word has length 356 [2021-12-21 10:58:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:17,695 INFO L470 AbstractCegarLoop]: Abstraction has 7601 states and 8647 transitions. [2021-12-21 10:58:17,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 7601 states and 8647 transitions. [2021-12-21 10:58:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-21 10:58:17,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:17,701 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 10:58:17,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:58:17,701 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2000820814, now seen corresponding path program 1 times [2021-12-21 10:58:17,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:17,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176366894] [2021-12-21 10:58:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:17,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-21 10:58:17,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176366894] [2021-12-21 10:58:17,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176366894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041526327] [2021-12-21 10:58:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:17,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:17,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:17,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:17,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:58:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-21 10:58:18,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:58:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-21 10:58:19,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041526327] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:19,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:58:19,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-21 10:58:19,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259967100] [2021-12-21 10:58:19,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:19,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:19,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:19,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:58:19,261 INFO L87 Difference]: Start difference. First operand 7601 states and 8647 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:19,833 INFO L93 Difference]: Finished difference Result 17036 states and 19446 transitions. [2021-12-21 10:58:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 359 [2021-12-21 10:58:19,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:19,866 INFO L225 Difference]: With dead ends: 17036 [2021-12-21 10:58:19,879 INFO L226 Difference]: Without dead ends: 9805 [2021-12-21 10:58:19,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 715 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:58:19,888 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 174 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:19,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 119 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2021-12-21 10:58:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 7964. [2021-12-21 10:58:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 1.1312319477583825) internal successors, (9008), 7963 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 9008 transitions. [2021-12-21 10:58:19,981 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 9008 transitions. Word has length 359 [2021-12-21 10:58:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:19,982 INFO L470 AbstractCegarLoop]: Abstraction has 7964 states and 9008 transitions. [2021-12-21 10:58:19,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 9008 transitions. [2021-12-21 10:58:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-12-21 10:58:19,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:19,990 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:20,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 10:58:20,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:20,208 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:20,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1108276798, now seen corresponding path program 1 times [2021-12-21 10:58:20,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:20,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122573160] [2021-12-21 10:58:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:20,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-21 10:58:20,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122573160] [2021-12-21 10:58:20,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122573160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:20,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:20,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:20,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314136237] [2021-12-21 10:58:20,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:20,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:20,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:20,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:20,331 INFO L87 Difference]: Start difference. First operand 7964 states and 9008 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:20,950 INFO L93 Difference]: Finished difference Result 17029 states and 19297 transitions. [2021-12-21 10:58:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 446 [2021-12-21 10:58:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:20,963 INFO L225 Difference]: With dead ends: 17029 [2021-12-21 10:58:20,964 INFO L226 Difference]: Without dead ends: 9435 [2021-12-21 10:58:20,970 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 [2021-12-21 10:58:20,970 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 101 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:20,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 322 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9435 states. [2021-12-21 10:58:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9435 to 7587. [2021-12-21 10:58:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7587 states, 7586 states have (on average 1.119825995254416) internal successors, (8495), 7586 states have internal predecessors, (8495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7587 states to 7587 states and 8495 transitions. [2021-12-21 10:58:21,070 INFO L78 Accepts]: Start accepts. Automaton has 7587 states and 8495 transitions. Word has length 446 [2021-12-21 10:58:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:21,071 INFO L470 AbstractCegarLoop]: Abstraction has 7587 states and 8495 transitions. [2021-12-21 10:58:21,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7587 states and 8495 transitions. [2021-12-21 10:58:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-12-21 10:58:21,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:21,082 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:21,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:58:21,082 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1480841082, now seen corresponding path program 1 times [2021-12-21 10:58:21,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:21,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850258386] [2021-12-21 10:58:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:21,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-12-21 10:58:21,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:21,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850258386] [2021-12-21 10:58:21,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850258386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:21,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:21,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:21,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976230664] [2021-12-21 10:58:21,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:21,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:21,210 INFO L87 Difference]: Start difference. First operand 7587 states and 8495 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:21,751 INFO L93 Difference]: Finished difference Result 15359 states and 17218 transitions. [2021-12-21 10:58:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 480 [2021-12-21 10:58:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:21,759 INFO L225 Difference]: With dead ends: 15359 [2021-12-21 10:58:21,760 INFO L226 Difference]: Without dead ends: 7958 [2021-12-21 10:58:21,767 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 [2021-12-21 10:58:21,768 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:21,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 172 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-12-21 10:58:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7955. [2021-12-21 10:58:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7955 states, 7954 states have (on average 1.1079959768669851) internal successors, (8813), 7954 states have internal predecessors, (8813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 8813 transitions. [2021-12-21 10:58:21,927 INFO L78 Accepts]: Start accepts. Automaton has 7955 states and 8813 transitions. Word has length 480 [2021-12-21 10:58:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:21,928 INFO L470 AbstractCegarLoop]: Abstraction has 7955 states and 8813 transitions. [2021-12-21 10:58:21,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7955 states and 8813 transitions. [2021-12-21 10:58:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-12-21 10:58:21,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:21,939 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-21 10:58:21,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:58:21,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash -380186503, now seen corresponding path program 1 times [2021-12-21 10:58:21,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:21,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657228505] [2021-12-21 10:58:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:21,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-12-21 10:58:22,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:22,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657228505] [2021-12-21 10:58:22,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657228505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:22,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:22,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:58:22,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893068918] [2021-12-21 10:58:22,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:22,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:22,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:22,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:22,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:22,130 INFO L87 Difference]: Start difference. First operand 7955 states and 8813 transitions. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:22,977 INFO L93 Difference]: Finished difference Result 17379 states and 19317 transitions. [2021-12-21 10:58:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 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 481 [2021-12-21 10:58:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:22,990 INFO L225 Difference]: With dead ends: 17379 [2021-12-21 10:58:22,990 INFO L226 Difference]: Without dead ends: 9794 [2021-12-21 10:58:22,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:23,000 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 285 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:23,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 167 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2021-12-21 10:58:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 8874. [2021-12-21 10:58:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8874 states, 8873 states have (on average 1.1000788910176942) internal successors, (9761), 8873 states have internal predecessors, (9761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8874 states to 8874 states and 9761 transitions. [2021-12-21 10:58:23,175 INFO L78 Accepts]: Start accepts. Automaton has 8874 states and 9761 transitions. Word has length 481 [2021-12-21 10:58:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:23,176 INFO L470 AbstractCegarLoop]: Abstraction has 8874 states and 9761 transitions. [2021-12-21 10:58:23,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 8874 states and 9761 transitions. [2021-12-21 10:58:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-21 10:58:23,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:23,186 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-21 10:58:23,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:58:23,187 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:23,187 INFO L85 PathProgramCache]: Analyzing trace with hash -914071402, now seen corresponding path program 1 times [2021-12-21 10:58:23,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:23,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114426885] [2021-12-21 10:58:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:23,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 578 proven. 133 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-21 10:58:23,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:23,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114426885] [2021-12-21 10:58:23,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114426885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:23,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764515687] [2021-12-21 10:58:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:23,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:23,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:23,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:58:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:58:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-21 10:58:24,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:24,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764515687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:24,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:24,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 10:58:24,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401775135] [2021-12-21 10:58:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:24,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:24,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:58:24,177 INFO L87 Difference]: Start difference. First operand 8874 states and 9761 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:24,716 INFO L93 Difference]: Finished difference Result 18305 states and 20183 transitions. [2021-12-21 10:58:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 518 [2021-12-21 10:58:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:24,725 INFO L225 Difference]: With dead ends: 18305 [2021-12-21 10:58:24,725 INFO L226 Difference]: Without dead ends: 9801 [2021-12-21 10:58:24,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:58:24,732 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 93 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:24,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 329 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9801 states. [2021-12-21 10:58:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 9610. [2021-12-21 10:58:24,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9610 states, 9609 states have (on average 1.0999063378083047) internal successors, (10569), 9609 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9610 states to 9610 states and 10569 transitions. [2021-12-21 10:58:24,804 INFO L78 Accepts]: Start accepts. Automaton has 9610 states and 10569 transitions. Word has length 518 [2021-12-21 10:58:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:24,805 INFO L470 AbstractCegarLoop]: Abstraction has 9610 states and 10569 transitions. [2021-12-21 10:58:24,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 9610 states and 10569 transitions. [2021-12-21 10:58:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-12-21 10:58:24,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:24,817 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:24,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:25,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 10:58:25,036 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash 978702432, now seen corresponding path program 1 times [2021-12-21 10:58:25,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:25,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141762165] [2021-12-21 10:58:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:25,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-21 10:58:25,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:25,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141762165] [2021-12-21 10:58:25,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141762165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:25,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:25,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:25,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758622212] [2021-12-21 10:58:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:25,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:25,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:25,208 INFO L87 Difference]: Start difference. First operand 9610 states and 10569 transitions. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:25,783 INFO L93 Difference]: Finished difference Result 20509 states and 22627 transitions. [2021-12-21 10:58:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 572 [2021-12-21 10:58:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:25,796 INFO L225 Difference]: With dead ends: 20509 [2021-12-21 10:58:25,796 INFO L226 Difference]: Without dead ends: 11269 [2021-12-21 10:58:25,804 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 [2021-12-21 10:58:25,805 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 120 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:25,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 73 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2021-12-21 10:58:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 9426. [2021-12-21 10:58:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9426 states, 9425 states have (on average 1.0980371352785145) internal successors, (10349), 9425 states have internal predecessors, (10349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 10349 transitions. [2021-12-21 10:58:25,980 INFO L78 Accepts]: Start accepts. Automaton has 9426 states and 10349 transitions. Word has length 572 [2021-12-21 10:58:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:25,981 INFO L470 AbstractCegarLoop]: Abstraction has 9426 states and 10349 transitions. [2021-12-21 10:58:25,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 9426 states and 10349 transitions. [2021-12-21 10:58:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2021-12-21 10:58:25,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:25,999 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:25,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:58:25,999 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash 47691538, now seen corresponding path program 1 times [2021-12-21 10:58:26,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:26,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985571699] [2021-12-21 10:58:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:26,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 1189 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-12-21 10:58:26,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985571699] [2021-12-21 10:58:26,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985571699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:26,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:26,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:26,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908214682] [2021-12-21 10:58:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:26,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:26,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:26,205 INFO L87 Difference]: Start difference. First operand 9426 states and 10349 transitions. Second operand has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:27,104 INFO L93 Difference]: Finished difference Result 20333 states and 22350 transitions. [2021-12-21 10:58:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:27,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 682 [2021-12-21 10:58:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:27,114 INFO L225 Difference]: With dead ends: 20333 [2021-12-21 10:58:27,114 INFO L226 Difference]: Without dead ends: 11092 [2021-12-21 10:58:27,119 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 [2021-12-21 10:58:27,120 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 205 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:27,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 73 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11092 states. [2021-12-21 10:58:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 8506. [2021-12-21 10:58:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 8505 states have (on average 1.0979423868312757) internal successors, (9338), 8505 states have internal predecessors, (9338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 9338 transitions. [2021-12-21 10:58:27,253 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 9338 transitions. Word has length 682 [2021-12-21 10:58:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:27,254 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 9338 transitions. [2021-12-21 10:58:27,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.25) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 9338 transitions. [2021-12-21 10:58:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2021-12-21 10:58:27,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:27,263 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:27,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:58:27,264 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash -534851769, now seen corresponding path program 1 times [2021-12-21 10:58:27,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:27,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193591806] [2021-12-21 10:58:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:27,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1055 proven. 0 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked. [2021-12-21 10:58:27,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:27,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193591806] [2021-12-21 10:58:27,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193591806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:27,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:27,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:27,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763073078] [2021-12-21 10:58:27,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:27,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:27,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:27,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:27,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:27,486 INFO L87 Difference]: Start difference. First operand 8506 states and 9338 transitions. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:28,511 INFO L93 Difference]: Finished difference Result 22725 states and 25044 transitions. [2021-12-21 10:58:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:28,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 774 [2021-12-21 10:58:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:28,526 INFO L225 Difference]: With dead ends: 22725 [2021-12-21 10:58:28,527 INFO L226 Difference]: Without dead ends: 14589 [2021-12-21 10:58:28,533 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 [2021-12-21 10:58:28,534 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 237 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:28,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 97 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:58:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14589 states. [2021-12-21 10:58:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14589 to 13665. [2021-12-21 10:58:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13665 states, 13664 states have (on average 1.088041569086651) internal successors, (14867), 13664 states have internal predecessors, (14867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13665 states to 13665 states and 14867 transitions. [2021-12-21 10:58:28,739 INFO L78 Accepts]: Start accepts. Automaton has 13665 states and 14867 transitions. Word has length 774 [2021-12-21 10:58:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:28,740 INFO L470 AbstractCegarLoop]: Abstraction has 13665 states and 14867 transitions. [2021-12-21 10:58:28,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 13665 states and 14867 transitions. [2021-12-21 10:58:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2021-12-21 10:58:28,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:28,756 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:28,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:58:28,756 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash 542249316, now seen corresponding path program 1 times [2021-12-21 10:58:28,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:28,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967705043] [2021-12-21 10:58:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:28,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 1107 proven. 336 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2021-12-21 10:58:28,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:28,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967705043] [2021-12-21 10:58:28,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967705043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:28,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713563175] [2021-12-21 10:58:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:28,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:28,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:28,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:28,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:58:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:29,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 10:58:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 1429 proven. 380 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-12-21 10:58:30,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:58:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 1809 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-12-21 10:58:31,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713563175] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:31,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:58:31,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2021-12-21 10:58:31,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70046740] [2021-12-21 10:58:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:31,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:58:31,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:58:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:58:31,763 INFO L87 Difference]: Start difference. First operand 13665 states and 14867 transitions. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:33,019 INFO L93 Difference]: Finished difference Result 32855 states and 35805 transitions. [2021-12-21 10:58:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 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 788 [2021-12-21 10:58:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:33,035 INFO L225 Difference]: With dead ends: 32855 [2021-12-21 10:58:33,036 INFO L226 Difference]: Without dead ends: 19560 [2021-12-21 10:58:33,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1570 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:58:33,043 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:33,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 69 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 10:58:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19560 states. [2021-12-21 10:58:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19560 to 17165. [2021-12-21 10:58:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17165 states, 17164 states have (on average 1.0907131204847356) internal successors, (18721), 17164 states have internal predecessors, (18721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17165 states to 17165 states and 18721 transitions. [2021-12-21 10:58:33,247 INFO L78 Accepts]: Start accepts. Automaton has 17165 states and 18721 transitions. Word has length 788 [2021-12-21 10:58:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:33,248 INFO L470 AbstractCegarLoop]: Abstraction has 17165 states and 18721 transitions. [2021-12-21 10:58:33,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17165 states and 18721 transitions. [2021-12-21 10:58:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2021-12-21 10:58:33,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:33,267 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:33,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:33,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:33,484 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1151524527, now seen corresponding path program 1 times [2021-12-21 10:58:33,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:33,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260372569] [2021-12-21 10:58:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:33,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2967 backedges. 1261 proven. 0 refuted. 0 times theorem prover too weak. 1706 trivial. 0 not checked. [2021-12-21 10:58:33,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260372569] [2021-12-21 10:58:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260372569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:33,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:33,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:33,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076103174] [2021-12-21 10:58:33,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:33,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:33,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:33,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:33,688 INFO L87 Difference]: Start difference. First operand 17165 states and 18721 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:34,196 INFO L93 Difference]: Finished difference Result 36912 states and 40337 transitions. [2021-12-21 10:58:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 886 [2021-12-21 10:58:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:34,225 INFO L225 Difference]: With dead ends: 36912 [2021-12-21 10:58:34,225 INFO L226 Difference]: Without dead ends: 20117 [2021-12-21 10:58:34,238 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 [2021-12-21 10:58:34,238 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 128 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:34,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 132 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:58:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20117 states. [2021-12-21 10:58:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20117 to 18824. [2021-12-21 10:58:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18824 states, 18823 states have (on average 1.0910588110290602) internal successors, (20537), 18823 states have internal predecessors, (20537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18824 states to 18824 states and 20537 transitions. [2021-12-21 10:58:34,525 INFO L78 Accepts]: Start accepts. Automaton has 18824 states and 20537 transitions. Word has length 886 [2021-12-21 10:58:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:34,525 INFO L470 AbstractCegarLoop]: Abstraction has 18824 states and 20537 transitions. [2021-12-21 10:58:34,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 18824 states and 20537 transitions. [2021-12-21 10:58:34,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 897 [2021-12-21 10:58:34,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:34,543 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 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] [2021-12-21 10:58:34,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:58:34,543 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash 414037878, now seen corresponding path program 1 times [2021-12-21 10:58:34,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:34,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156107019] [2021-12-21 10:58:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:34,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2987 backedges. 2309 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-12-21 10:58:34,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156107019] [2021-12-21 10:58:34,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156107019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:34,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:34,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:58:34,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69972288] [2021-12-21 10:58:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:34,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:34,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:34,885 INFO L87 Difference]: Start difference. First operand 18824 states and 20537 transitions. Second operand has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:35,802 INFO L93 Difference]: Finished difference Result 42075 states and 45858 transitions. [2021-12-21 10:58:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:35,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 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 896 [2021-12-21 10:58:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:35,826 INFO L225 Difference]: With dead ends: 42075 [2021-12-21 10:58:35,827 INFO L226 Difference]: Without dead ends: 23621 [2021-12-21 10:58:35,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:35,841 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 196 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:35,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 71 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23621 states. [2021-12-21 10:58:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23621 to 19569. [2021-12-21 10:58:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 19568 states have (on average 1.0917313982011447) internal successors, (21363), 19568 states have internal predecessors, (21363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 21363 transitions. [2021-12-21 10:58:36,117 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 21363 transitions. Word has length 896 [2021-12-21 10:58:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:36,117 INFO L470 AbstractCegarLoop]: Abstraction has 19569 states and 21363 transitions. [2021-12-21 10:58:36,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 21363 transitions. [2021-12-21 10:58:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2021-12-21 10:58:36,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:36,136 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:58:36,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:58:36,136 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1401252317, now seen corresponding path program 1 times [2021-12-21 10:58:36,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:36,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706683255] [2021-12-21 10:58:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:36,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 2450 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-12-21 10:58:36,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706683255] [2021-12-21 10:58:36,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706683255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:36,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:36,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:58:36,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860883447] [2021-12-21 10:58:36,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:36,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:36,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:36,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:36,371 INFO L87 Difference]: Start difference. First operand 19569 states and 21363 transitions. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:37,306 INFO L93 Difference]: Finished difference Result 44118 states and 48129 transitions. [2021-12-21 10:58:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:37,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 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 907 [2021-12-21 10:58:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:37,331 INFO L225 Difference]: With dead ends: 44118 [2021-12-21 10:58:37,332 INFO L226 Difference]: Without dead ends: 24919 [2021-12-21 10:58:37,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:37,345 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 180 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:37,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 73 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24919 states. [2021-12-21 10:58:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24919 to 19753. [2021-12-21 10:58:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19753 states, 19752 states have (on average 1.0881429728635075) internal successors, (21493), 19752 states have internal predecessors, (21493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19753 states to 19753 states and 21493 transitions. [2021-12-21 10:58:37,586 INFO L78 Accepts]: Start accepts. Automaton has 19753 states and 21493 transitions. Word has length 907 [2021-12-21 10:58:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:37,586 INFO L470 AbstractCegarLoop]: Abstraction has 19753 states and 21493 transitions. [2021-12-21 10:58:37,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19753 states and 21493 transitions. [2021-12-21 10:58:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2021-12-21 10:58:37,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:37,605 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:37,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:58:37,606 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash 198152612, now seen corresponding path program 1 times [2021-12-21 10:58:37,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:37,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444323543] [2021-12-21 10:58:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:37,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3765 backedges. 2224 proven. 830 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2021-12-21 10:58:37,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:37,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444323543] [2021-12-21 10:58:37,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444323543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:37,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125629992] [2021-12-21 10:58:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:37,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:37,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:37,988 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:37,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:58:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:38,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:38,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3765 backedges. 2291 proven. 0 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2021-12-21 10:58:39,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:39,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125629992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:39,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:39,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-21 10:58:39,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444435993] [2021-12-21 10:58:39,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:39,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:39,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:39,748 INFO L87 Difference]: Start difference. First operand 19753 states and 21493 transitions. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:40,364 INFO L93 Difference]: Finished difference Result 39890 states and 43462 transitions. [2021-12-21 10:58:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 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 1050 [2021-12-21 10:58:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:40,385 INFO L225 Difference]: With dead ends: 39890 [2021-12-21 10:58:40,385 INFO L226 Difference]: Without dead ends: 20507 [2021-12-21 10:58:40,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:40,399 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 106 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:40,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 328 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20507 states. [2021-12-21 10:58:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20507 to 19763. [2021-12-21 10:58:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19763 states, 19762 states have (on average 1.0865803056370813) internal successors, (21473), 19762 states have internal predecessors, (21473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19763 states to 19763 states and 21473 transitions. [2021-12-21 10:58:40,656 INFO L78 Accepts]: Start accepts. Automaton has 19763 states and 21473 transitions. Word has length 1050 [2021-12-21 10:58:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:40,656 INFO L470 AbstractCegarLoop]: Abstraction has 19763 states and 21473 transitions. [2021-12-21 10:58:40,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 19763 states and 21473 transitions. [2021-12-21 10:58:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1055 [2021-12-21 10:58:40,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:40,675 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 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, 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] [2021-12-21 10:58:40,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:40,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:40,891 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:40,892 INFO L85 PathProgramCache]: Analyzing trace with hash 256274069, now seen corresponding path program 1 times [2021-12-21 10:58:40,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:40,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420438563] [2021-12-21 10:58:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:40,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3893 backedges. 3097 proven. 0 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-12-21 10:58:41,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420438563] [2021-12-21 10:58:41,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420438563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:41,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:41,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:58:41,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993161026] [2021-12-21 10:58:41,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:41,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:41,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:41,191 INFO L87 Difference]: Start difference. First operand 19763 states and 21473 transitions. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:42,311 INFO L93 Difference]: Finished difference Result 44880 states and 48738 transitions. [2021-12-21 10:58:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:42,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 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 1054 [2021-12-21 10:58:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:42,332 INFO L225 Difference]: With dead ends: 44880 [2021-12-21 10:58:42,332 INFO L226 Difference]: Without dead ends: 25487 [2021-12-21 10:58:42,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:42,341 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 182 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:42,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 73 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:58:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25487 states. [2021-12-21 10:58:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25487 to 19395. [2021-12-21 10:58:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19395 states, 19394 states have (on average 1.087604413736207) internal successors, (21093), 19394 states have internal predecessors, (21093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19395 states to 19395 states and 21093 transitions. [2021-12-21 10:58:42,550 INFO L78 Accepts]: Start accepts. Automaton has 19395 states and 21093 transitions. Word has length 1054 [2021-12-21 10:58:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:42,550 INFO L470 AbstractCegarLoop]: Abstraction has 19395 states and 21093 transitions. [2021-12-21 10:58:42,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 19395 states and 21093 transitions. [2021-12-21 10:58:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2021-12-21 10:58:42,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:42,569 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:42,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 10:58:42,569 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1982006465, now seen corresponding path program 1 times [2021-12-21 10:58:42,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:42,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534755335] [2021-12-21 10:58:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:42,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 2244 proven. 0 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2021-12-21 10:58:42,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:42,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534755335] [2021-12-21 10:58:42,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534755335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:42,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:42,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:42,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519244608] [2021-12-21 10:58:42,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:42,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:42,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:42,834 INFO L87 Difference]: Start difference. First operand 19395 states and 21093 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 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) [2021-12-21 10:58:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:43,204 INFO L93 Difference]: Finished difference Result 37672 states and 40972 transitions. [2021-12-21 10:58:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 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 1160 [2021-12-21 10:58:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:43,222 INFO L225 Difference]: With dead ends: 37672 [2021-12-21 10:58:43,222 INFO L226 Difference]: Without dead ends: 18646 [2021-12-21 10:58:43,233 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 [2021-12-21 10:58:43,234 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:43,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 31 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:58:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18646 states. [2021-12-21 10:58:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18646 to 18640. [2021-12-21 10:58:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18640 states, 18639 states have (on average 1.0858951660496807) internal successors, (20240), 18639 states have internal predecessors, (20240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18640 states to 18640 states and 20240 transitions. [2021-12-21 10:58:43,421 INFO L78 Accepts]: Start accepts. Automaton has 18640 states and 20240 transitions. Word has length 1160 [2021-12-21 10:58:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:43,421 INFO L470 AbstractCegarLoop]: Abstraction has 18640 states and 20240 transitions. [2021-12-21 10:58:43,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 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) [2021-12-21 10:58:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18640 states and 20240 transitions. [2021-12-21 10:58:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1185 [2021-12-21 10:58:43,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:43,440 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:43,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 10:58:43,441 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1536632297, now seen corresponding path program 1 times [2021-12-21 10:58:43,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:43,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591954589] [2021-12-21 10:58:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:43,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4195 backedges. 1524 proven. 0 refuted. 0 times theorem prover too weak. 2671 trivial. 0 not checked. [2021-12-21 10:58:43,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:43,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591954589] [2021-12-21 10:58:43,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591954589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:43,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:43,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:43,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939075642] [2021-12-21 10:58:43,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:43,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:43,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:43,742 INFO L87 Difference]: Start difference. First operand 18640 states and 20240 transitions. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:44,627 INFO L93 Difference]: Finished difference Result 37831 states and 41085 transitions. [2021-12-21 10:58:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:44,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 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 1184 [2021-12-21 10:58:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:44,646 INFO L225 Difference]: With dead ends: 37831 [2021-12-21 10:58:44,647 INFO L226 Difference]: Without dead ends: 19193 [2021-12-21 10:58:44,658 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 [2021-12-21 10:58:44,658 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 200 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:44,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 75 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19193 states. [2021-12-21 10:58:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19193 to 19192. [2021-12-21 10:58:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19192 states, 19191 states have (on average 1.0842582460528372) internal successors, (20808), 19191 states have internal predecessors, (20808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19192 states to 19192 states and 20808 transitions. [2021-12-21 10:58:44,856 INFO L78 Accepts]: Start accepts. Automaton has 19192 states and 20808 transitions. Word has length 1184 [2021-12-21 10:58:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:44,856 INFO L470 AbstractCegarLoop]: Abstraction has 19192 states and 20808 transitions. [2021-12-21 10:58:44,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 19192 states and 20808 transitions. [2021-12-21 10:58:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2021-12-21 10:58:44,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:44,877 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 10:58:44,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 10:58:44,877 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1855217040, now seen corresponding path program 1 times [2021-12-21 10:58:44,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:44,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727390531] [2021-12-21 10:58:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:44,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4769 backedges. 2030 proven. 0 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2021-12-21 10:58:45,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:45,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727390531] [2021-12-21 10:58:45,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727390531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:45,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:45,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:45,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717787966] [2021-12-21 10:58:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:45,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:45,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:45,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:45,162 INFO L87 Difference]: Start difference. First operand 19192 states and 20808 transitions. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:45,814 INFO L93 Difference]: Finished difference Result 41337 states and 44764 transitions. [2021-12-21 10:58:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 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 1222 [2021-12-21 10:58:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:45,834 INFO L225 Difference]: With dead ends: 41337 [2021-12-21 10:58:45,834 INFO L226 Difference]: Without dead ends: 21411 [2021-12-21 10:58:45,843 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 [2021-12-21 10:58:45,844 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:45,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 324 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21411 states. [2021-12-21 10:58:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21411 to 19749. [2021-12-21 10:58:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19749 states, 19748 states have (on average 1.08122341502937) internal successors, (21352), 19748 states have internal predecessors, (21352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 21352 transitions. [2021-12-21 10:58:46,050 INFO L78 Accepts]: Start accepts. Automaton has 19749 states and 21352 transitions. Word has length 1222 [2021-12-21 10:58:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:46,050 INFO L470 AbstractCegarLoop]: Abstraction has 19749 states and 21352 transitions. [2021-12-21 10:58:46,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19749 states and 21352 transitions. [2021-12-21 10:58:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2021-12-21 10:58:46,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:46,070 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-21 10:58:46,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 10:58:46,070 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1480409017, now seen corresponding path program 1 times [2021-12-21 10:58:46,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:46,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159205408] [2021-12-21 10:58:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:46,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 2293 proven. 73 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2021-12-21 10:58:46,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159205408] [2021-12-21 10:58:46,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159205408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658072588] [2021-12-21 10:58:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:46,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:46,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:46,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:58:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:46,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 2616 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-12-21 10:58:47,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:47,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658072588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:47,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:47,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-12-21 10:58:47,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967046652] [2021-12-21 10:58:47,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:47,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:47,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:47,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:47,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:47,714 INFO L87 Difference]: Start difference. First operand 19749 states and 21352 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:48,217 INFO L93 Difference]: Finished difference Result 33400 states and 36118 transitions. [2021-12-21 10:58:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:48,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 1222 [2021-12-21 10:58:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:48,218 INFO L225 Difference]: With dead ends: 33400 [2021-12-21 10:58:48,218 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 10:58:48,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 1223 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:48,229 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:48,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 279 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:58:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 10:58:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 10:58:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 10:58:48,230 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1222 [2021-12-21 10:58:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:48,230 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 10:58:48,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 10:58:48,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 10:58:48,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 10:58:48,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:48,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:48,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.