./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_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/Problem16_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 540d5c4f35934e1abeb0886e7556fb35e244ff515a3f2091d43a3a4e43fb5fb5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:16:16,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:16:16,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:16:16,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:16:16,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:16:16,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:16:16,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:16:16,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:16:16,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:16:16,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:16:16,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:16:16,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:16:16,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:16:16,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:16:16,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:16:16,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:16:16,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:16:16,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:16:16,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:16:16,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:16:16,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:16:16,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:16:16,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:16:16,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:16:16,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:16:16,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:16:16,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:16:16,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:16:16,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:16:16,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:16:16,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:16:16,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:16:16,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:16:16,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:16:16,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:16:16,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:16:16,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:16:16,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:16:16,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:16:16,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:16:16,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:16:16,634 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:16:16,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:16:16,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:16:16,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:16:16,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:16:16,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:16:16,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:16:16,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:16:16,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:16:16,653 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:16:16,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:16:16,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:16:16,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:16:16,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:16:16,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:16:16,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:16:16,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:16:16,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:16:16,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:16:16,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:16:16,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:16:16,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:16:16,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:16:16,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:16:16,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:16:16,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:16:16,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:16:16,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:16:16,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:16:16,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:16:16,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:16:16,658 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:16:16,658 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:16:16,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:16:16,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:16:16,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 540d5c4f35934e1abeb0886e7556fb35e244ff515a3f2091d43a3a4e43fb5fb5 [2021-12-21 11:16:16,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:16:16,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:16:16,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:16:16,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:16:16,872 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:16:16,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label02.c [2021-12-21 11:16:16,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3d33124/19c38ff29daa4da79c9ecdaea9b12257/FLAG621b8fcde [2021-12-21 11:16:17,393 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:16:17,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label02.c [2021-12-21 11:16:17,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3d33124/19c38ff29daa4da79c9ecdaea9b12257/FLAG621b8fcde [2021-12-21 11:16:17,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3d33124/19c38ff29daa4da79c9ecdaea9b12257 [2021-12-21 11:16:17,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:16:17,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:16:17,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:16:17,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:16:17,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:16:17,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:16:17" (1/1) ... [2021-12-21 11:16:17,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a4cde1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:17, skipping insertion in model container [2021-12-21 11:16:17,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:16:17" (1/1) ... [2021-12-21 11:16:17,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:16:17,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:16:18,176 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/Problem16_label02.c[6387,6400] [2021-12-21 11:16:18,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:16:18,653 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:16:18,707 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/Problem16_label02.c[6387,6400] [2021-12-21 11:16:18,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:16:18,870 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:16:18,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18 WrapperNode [2021-12-21 11:16:18,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:16:18,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:16:18,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:16:18,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:16:18,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:18,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:18,989 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-21 11:16:18,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:16:18,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:16:18,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:16:18,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:16:18,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:18,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:19,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:19,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:19,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:19,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:19,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:19,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:16:19,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:16:19,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:16:19,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:16:19,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (1/1) ... [2021-12-21 11:16:19,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:16:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:16:19,139 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 11:16:19,151 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 11:16:19,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:16:19,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:16:19,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:16:19,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:16:19,243 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:16:19,244 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:16:20,865 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:16:20,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:16:20,881 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:16:20,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:16:20 BoogieIcfgContainer [2021-12-21 11:16:20,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:16:20,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:16:20,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:16:20,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:16:20,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:16:17" (1/3) ... [2021-12-21 11:16:20,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a2cf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:16:20, skipping insertion in model container [2021-12-21 11:16:20,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:16:18" (2/3) ... [2021-12-21 11:16:20,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a2cf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:16:20, skipping insertion in model container [2021-12-21 11:16:20,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:16:20" (3/3) ... [2021-12-21 11:16:20,892 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label02.c [2021-12-21 11:16:20,897 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:16:20,898 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:16:20,949 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:16:20,956 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 11:16:20,957 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:16:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 11:16:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 11:16:20,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:20,994 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:20,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:20,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-12-21 11:16:21,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:21,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443673118] [2021-12-21 11:16:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:21,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:21,276 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 11:16:21,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443673118] [2021-12-21 11:16:21,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443673118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:21,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:21,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:16:21,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004271494] [2021-12-21 11:16:21,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:21,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:21,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:16:21,317 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 11:16:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:22,741 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2021-12-21 11:16:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 11:16:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:22,754 INFO L225 Difference]: With dead ends: 1137 [2021-12-21 11:16:22,754 INFO L226 Difference]: Without dead ends: 662 [2021-12-21 11:16:22,757 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 11:16:22,760 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 323 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:22,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 114 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:16:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-21 11:16:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-21 11:16:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7004538577912254) internal successors, (1124), 661 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 11:16:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1124 transitions. [2021-12-21 11:16:22,812 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1124 transitions. Word has length 61 [2021-12-21 11:16:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:22,812 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1124 transitions. [2021-12-21 11:16:22,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 11:16:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1124 transitions. [2021-12-21 11:16:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-21 11:16:22,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:22,816 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:22,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:16:22,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash 804089513, now seen corresponding path program 1 times [2021-12-21 11:16:22,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:22,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425611756] [2021-12-21 11:16:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:22,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:16:22,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425611756] [2021-12-21 11:16:22,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425611756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:22,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:22,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:16:22,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476198423] [2021-12-21 11:16:22,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:22,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:22,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:16:22,922 INFO L87 Difference]: Start difference. First operand 662 states and 1124 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 11:16:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:23,940 INFO L93 Difference]: Finished difference Result 1980 states and 3367 transitions. [2021-12-21 11:16:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-21 11:16:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:23,944 INFO L225 Difference]: With dead ends: 1980 [2021-12-21 11:16:23,945 INFO L226 Difference]: Without dead ends: 1320 [2021-12-21 11:16:23,947 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 11:16:23,950 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:23,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:16:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-21 11:16:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-21 11:16:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.620166793025019) internal successors, (2137), 1319 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states 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 11:16:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2137 transitions. [2021-12-21 11:16:23,986 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2137 transitions. Word has length 127 [2021-12-21 11:16:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:23,988 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2137 transitions. [2021-12-21 11:16:23,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 11:16:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2137 transitions. [2021-12-21 11:16:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 11:16:23,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:23,998 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:23,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:16:23,999 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:23,999 INFO L85 PathProgramCache]: Analyzing trace with hash 601628073, now seen corresponding path program 1 times [2021-12-21 11:16:23,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:23,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75524093] [2021-12-21 11:16:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:24,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:16:24,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:24,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75524093] [2021-12-21 11:16:24,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75524093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:24,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:24,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:16:24,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183767426] [2021-12-21 11:16:24,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:24,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:24,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:16:24,137 INFO L87 Difference]: Start difference. First operand 1320 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 11:16:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:25,341 INFO L93 Difference]: Finished difference Result 3296 states and 5285 transitions. [2021-12-21 11:16:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:25,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-12-21 11:16:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:25,347 INFO L225 Difference]: With dead ends: 3296 [2021-12-21 11:16:25,347 INFO L226 Difference]: Without dead ends: 1978 [2021-12-21 11:16:25,348 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 11:16:25,349 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:25,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:16:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-21 11:16:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-21 11:16:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.3323216995447649) internal successors, (2634), 1977 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states 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 11:16:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2634 transitions. [2021-12-21 11:16:25,374 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2634 transitions. Word has length 128 [2021-12-21 11:16:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:25,375 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2634 transitions. [2021-12-21 11:16:25,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 11:16:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2634 transitions. [2021-12-21 11:16:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-21 11:16:25,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:25,377 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:25,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:16:25,377 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1357591119, now seen corresponding path program 1 times [2021-12-21 11:16:25,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:25,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258934164] [2021-12-21 11:16:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:25,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:16:25,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258934164] [2021-12-21 11:16:25,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258934164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:25,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:25,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:16:25,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706370383] [2021-12-21 11:16:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:25,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:25,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:16:25,464 INFO L87 Difference]: Start difference. First operand 1978 states and 2634 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 11:16:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:26,699 INFO L93 Difference]: Finished difference Result 5928 states and 7897 transitions. [2021-12-21 11:16:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-12-21 11:16:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:26,709 INFO L225 Difference]: With dead ends: 5928 [2021-12-21 11:16:26,710 INFO L226 Difference]: Without dead ends: 3952 [2021-12-21 11:16:26,712 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 11:16:26,713 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:26,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 257 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 11:16:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-21 11:16:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-21 11:16:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.2171602126044039) internal successors, (4809), 3951 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states 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 11:16:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4809 transitions. [2021-12-21 11:16:26,768 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4809 transitions. Word has length 220 [2021-12-21 11:16:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:26,769 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4809 transitions. [2021-12-21 11:16:26,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 11:16:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4809 transitions. [2021-12-21 11:16:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-21 11:16:26,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:26,773 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:26,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:16:26,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1544183199, now seen corresponding path program 1 times [2021-12-21 11:16:26,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:26,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053599295] [2021-12-21 11:16:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:26,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:16:26,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:26,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053599295] [2021-12-21 11:16:26,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053599295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:16:26,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074622180] [2021-12-21 11:16:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:26,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:16:26,939 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 11:16:26,958 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 11:16:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:16:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:16:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 11:16:27,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:16:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074622180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:27,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:16:27,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-21 11:16:27,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875045345] [2021-12-21 11:16:27,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:27,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:27,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:16:27,572 INFO L87 Difference]: Start difference. First operand 3952 states and 4809 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 11:16:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:28,639 INFO L93 Difference]: Finished difference Result 5270 states and 6254 transitions. [2021-12-21 11:16:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 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 304 [2021-12-21 11:16:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:28,655 INFO L225 Difference]: With dead ends: 5270 [2021-12-21 11:16:28,657 INFO L226 Difference]: Without dead ends: 5268 [2021-12-21 11:16:28,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:16:28,662 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 109 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:28,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 158 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:16:28,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-21 11:16:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4610. [2021-12-21 11:16:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.2013451941852897) internal successors, (5537), 4609 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states 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 11:16:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5537 transitions. [2021-12-21 11:16:28,730 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5537 transitions. Word has length 304 [2021-12-21 11:16:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:28,735 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5537 transitions. [2021-12-21 11:16:28,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 11:16:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5537 transitions. [2021-12-21 11:16:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-12-21 11:16:28,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:28,741 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:16:28,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:16:28,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:28,958 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2079847568, now seen corresponding path program 1 times [2021-12-21 11:16:28,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:28,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496472524] [2021-12-21 11:16:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:28,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:16:29,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:29,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496472524] [2021-12-21 11:16:29,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496472524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:29,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:29,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:16:29,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671560526] [2021-12-21 11:16:29,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:29,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:16:29,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:16:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:16:29,237 INFO L87 Difference]: Start difference. First operand 4610 states and 5537 transitions. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 11:16:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:30,388 INFO L93 Difference]: Finished difference Result 9588 states and 11454 transitions. [2021-12-21 11:16:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:16:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 413 [2021-12-21 11:16:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:30,400 INFO L225 Difference]: With dead ends: 9588 [2021-12-21 11:16:30,401 INFO L226 Difference]: Without dead ends: 4980 [2021-12-21 11:16:30,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:16:30,404 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 175 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:30,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:16:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2021-12-21 11:16:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 4939. [2021-12-21 11:16:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.1891454029971649) internal successors, (5872), 4938 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states 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 11:16:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5872 transitions. [2021-12-21 11:16:30,468 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5872 transitions. Word has length 413 [2021-12-21 11:16:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:30,468 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 5872 transitions. [2021-12-21 11:16:30,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 11:16:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5872 transitions. [2021-12-21 11:16:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-12-21 11:16:30,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:30,474 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, 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, 2, 2, 2, 2, 2, 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] [2021-12-21 11:16:30,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:16:30,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:30,475 INFO L85 PathProgramCache]: Analyzing trace with hash -832462339, now seen corresponding path program 1 times [2021-12-21 11:16:30,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:30,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560334790] [2021-12-21 11:16:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:30,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-21 11:16:30,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:30,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560334790] [2021-12-21 11:16:30,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560334790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:16:30,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394666005] [2021-12-21 11:16:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:30,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:30,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:16:30,676 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 11:16:30,723 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 11:16:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:16:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:16:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-21 11:16:31,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:16:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-21 11:16:35,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394666005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:16:35,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:16:35,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-12-21 11:16:35,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712870852] [2021-12-21 11:16:35,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:16:35,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 11:16:35,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 11:16:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:16:35,037 INFO L87 Difference]: Start difference. First operand 4939 states and 5872 transitions. Second operand has 8 states, 8 states have (on average 111.5) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 0 states 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 11:16:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:40,582 INFO L93 Difference]: Finished difference Result 16785 states and 20176 transitions. [2021-12-21 11:16:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 11:16:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 111.5) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 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 475 [2021-12-21 11:16:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:40,655 INFO L225 Difference]: With dead ends: 16785 [2021-12-21 11:16:40,656 INFO L226 Difference]: Without dead ends: 12177 [2021-12-21 11:16:40,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 11:16:40,671 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1727 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 3539 mSolverCounterSat, 1711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1711 IncrementalHoareTripleChecker+Valid, 3539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:40,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1727 Valid, 36 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1711 Valid, 3539 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-21 11:16:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-12-21 11:16:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 10861. [2021-12-21 11:16:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.1918968692449357) internal successors, (12944), 10860 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states 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 11:16:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 12944 transitions. [2021-12-21 11:16:40,966 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 12944 transitions. Word has length 475 [2021-12-21 11:16:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:40,967 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 12944 transitions. [2021-12-21 11:16:40,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.5) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 0 states 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 11:16:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 12944 transitions. [2021-12-21 11:16:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-12-21 11:16:40,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:40,978 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:40,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:16:41,191 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,SelfDestructingSolverStorable6 [2021-12-21 11:16:41,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1917555893, now seen corresponding path program 1 times [2021-12-21 11:16:41,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:41,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10381476] [2021-12-21 11:16:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:41,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 11:16:41,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:41,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10381476] [2021-12-21 11:16:41,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10381476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:41,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:41,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:16:41,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741267601] [2021-12-21 11:16:41,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:41,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:41,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:41,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:16:41,527 INFO L87 Difference]: Start difference. First operand 10861 states and 12944 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 11:16:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:42,434 INFO L93 Difference]: Finished difference Result 25339 states and 30660 transitions. [2021-12-21 11:16:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:42,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 562 [2021-12-21 11:16:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:42,477 INFO L225 Difference]: With dead ends: 25339 [2021-12-21 11:16:42,477 INFO L226 Difference]: Without dead ends: 14809 [2021-12-21 11:16:42,503 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 11:16:42,505 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 171 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:42,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 595 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:16:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2021-12-21 11:16:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 14151. [2021-12-21 11:16:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.1548409893992932) internal successors, (16341), 14150 states have internal predecessors, (16341), 0 states have call successors, (0), 0 states 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 11:16:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 16341 transitions. [2021-12-21 11:16:42,825 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 16341 transitions. Word has length 562 [2021-12-21 11:16:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:42,826 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 16341 transitions. [2021-12-21 11:16:42,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 11:16:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 16341 transitions. [2021-12-21 11:16:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2021-12-21 11:16:42,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:42,838 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, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:42,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:16:42,839 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash 788273314, now seen corresponding path program 1 times [2021-12-21 11:16:42,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:42,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952173892] [2021-12-21 11:16:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:42,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-21 11:16:43,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:43,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952173892] [2021-12-21 11:16:43,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952173892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:43,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:43,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 11:16:43,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131634689] [2021-12-21 11:16:43,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:43,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 11:16:43,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 11:16:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:16:43,098 INFO L87 Difference]: Start difference. First operand 14151 states and 16341 transitions. Second operand has 7 states, 7 states have (on average 56.57142857142857) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 11:16:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:44,218 INFO L93 Difference]: Finished difference Result 27047 states and 31373 transitions. [2021-12-21 11:16:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:16:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.57142857142857) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 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 566 [2021-12-21 11:16:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:44,265 INFO L225 Difference]: With dead ends: 27047 [2021-12-21 11:16:44,265 INFO L226 Difference]: Without dead ends: 13248 [2021-12-21 11:16:44,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:16:44,282 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 368 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:44,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 286 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:16:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2021-12-21 11:16:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 11908. [2021-12-21 11:16:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11908 states, 11907 states have (on average 1.0703787687914672) internal successors, (12745), 11907 states have internal predecessors, (12745), 0 states have call successors, (0), 0 states 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 11:16:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11908 states to 11908 states and 12745 transitions. [2021-12-21 11:16:44,462 INFO L78 Accepts]: Start accepts. Automaton has 11908 states and 12745 transitions. Word has length 566 [2021-12-21 11:16:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:44,462 INFO L470 AbstractCegarLoop]: Abstraction has 11908 states and 12745 transitions. [2021-12-21 11:16:44,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.57142857142857) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 11:16:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 11908 states and 12745 transitions. [2021-12-21 11:16:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2021-12-21 11:16:44,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:44,472 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:16:44,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:16:44,472 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash -854616129, now seen corresponding path program 1 times [2021-12-21 11:16:44,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:44,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856503764] [2021-12-21 11:16:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:44,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 902 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-21 11:16:44,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:44,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856503764] [2021-12-21 11:16:44,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856503764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:44,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:44,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:16:44,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998757453] [2021-12-21 11:16:44,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:44,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:44,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:16:44,618 INFO L87 Difference]: Start difference. First operand 11908 states and 12745 transitions. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 11:16:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:45,400 INFO L93 Difference]: Finished difference Result 26775 states and 28794 transitions. [2021-12-21 11:16:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 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 698 [2021-12-21 11:16:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:45,420 INFO L225 Difference]: With dead ends: 26775 [2021-12-21 11:16:45,420 INFO L226 Difference]: Without dead ends: 15198 [2021-12-21 11:16:45,431 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 11:16:45,431 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:45,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 41 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:16:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15198 states. [2021-12-21 11:16:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15198 to 14869. [2021-12-21 11:16:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14869 states, 14868 states have (on average 1.0737153618509552) internal successors, (15964), 14868 states have internal predecessors, (15964), 0 states have call successors, (0), 0 states 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 11:16:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14869 states to 14869 states and 15964 transitions. [2021-12-21 11:16:45,581 INFO L78 Accepts]: Start accepts. Automaton has 14869 states and 15964 transitions. Word has length 698 [2021-12-21 11:16:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:45,582 INFO L470 AbstractCegarLoop]: Abstraction has 14869 states and 15964 transitions. [2021-12-21 11:16:45,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 11:16:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 14869 states and 15964 transitions. [2021-12-21 11:16:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2021-12-21 11:16:45,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:45,590 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, 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, 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, 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] [2021-12-21 11:16:45,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:16:45,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash 479289470, now seen corresponding path program 1 times [2021-12-21 11:16:45,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:45,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917353245] [2021-12-21 11:16:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:45,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-12-21 11:16:45,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917353245] [2021-12-21 11:16:45,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917353245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:45,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:16:45,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:16:45,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980219697] [2021-12-21 11:16:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:45,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:16:45,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:16:45,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:16:45,889 INFO L87 Difference]: Start difference. First operand 14869 states and 15964 transitions. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 11:16:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:46,561 INFO L93 Difference]: Finished difference Result 15259 states and 16361 transitions. [2021-12-21 11:16:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:16:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 722 [2021-12-21 11:16:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:46,610 INFO L225 Difference]: With dead ends: 15259 [2021-12-21 11:16:46,611 INFO L226 Difference]: Without dead ends: 15198 [2021-12-21 11:16:46,615 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 11:16:46,616 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 505 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:46,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 17 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:16:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15198 states. [2021-12-21 11:16:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15198 to 14869. [2021-12-21 11:16:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14869 states, 14868 states have (on average 1.0733118105999462) internal successors, (15958), 14868 states have internal predecessors, (15958), 0 states have call successors, (0), 0 states 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 11:16:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14869 states to 14869 states and 15958 transitions. [2021-12-21 11:16:46,915 INFO L78 Accepts]: Start accepts. Automaton has 14869 states and 15958 transitions. Word has length 722 [2021-12-21 11:16:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:46,916 INFO L470 AbstractCegarLoop]: Abstraction has 14869 states and 15958 transitions. [2021-12-21 11:16:46,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 11:16:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 14869 states and 15958 transitions. [2021-12-21 11:16:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2021-12-21 11:16:46,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:46,941 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:16:46,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:16:46,941 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1199607507, now seen corresponding path program 1 times [2021-12-21 11:16:46,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:46,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814146800] [2021-12-21 11:16:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:46,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 786 proven. 156 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-12-21 11:16:47,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:47,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814146800] [2021-12-21 11:16:47,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814146800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:16:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325014309] [2021-12-21 11:16:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:47,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:47,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:16:47,379 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 11:16:47,380 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 11:16:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:16:47,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:16:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 1003 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-21 11:16:48,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:16:48,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325014309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:48,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:16:48,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:16:48,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505770833] [2021-12-21 11:16:48,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:48,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:48,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:16:48,444 INFO L87 Difference]: Start difference. First operand 14869 states and 15958 transitions. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:16:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:49,327 INFO L93 Difference]: Finished difference Result 32697 states and 35219 transitions. [2021-12-21 11:16:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 808 [2021-12-21 11:16:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:49,350 INFO L225 Difference]: With dead ends: 32697 [2021-12-21 11:16:49,351 INFO L226 Difference]: Without dead ends: 18159 [2021-12-21 11:16:49,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:16:49,365 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 173 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:49,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 452 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:16:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18159 states. [2021-12-21 11:16:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18159 to 17501. [2021-12-21 11:16:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17501 states, 17500 states have (on average 1.0630857142857142) internal successors, (18604), 17500 states have internal predecessors, (18604), 0 states have call successors, (0), 0 states 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 11:16:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17501 states to 17501 states and 18604 transitions. [2021-12-21 11:16:49,544 INFO L78 Accepts]: Start accepts. Automaton has 17501 states and 18604 transitions. Word has length 808 [2021-12-21 11:16:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:49,545 INFO L470 AbstractCegarLoop]: Abstraction has 17501 states and 18604 transitions. [2021-12-21 11:16:49,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:16:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 17501 states and 18604 transitions. [2021-12-21 11:16:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-12-21 11:16:49,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:49,558 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:16:49,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:16:49,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:49,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2142221905, now seen corresponding path program 1 times [2021-12-21 11:16:49,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:49,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246497832] [2021-12-21 11:16:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 118 proven. 542 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-21 11:16:50,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246497832] [2021-12-21 11:16:50,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246497832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:16:50,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194773886] [2021-12-21 11:16:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:50,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:50,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:16:50,124 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 11:16:50,151 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 11:16:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:16:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:16:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-21 11:16:51,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:16:51,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194773886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:16:51,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:16:51,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:16:51,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471306478] [2021-12-21 11:16:51,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:16:51,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:16:51,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:16:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:16:51,294 INFO L87 Difference]: Start difference. First operand 17501 states and 18604 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 11:16:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:16:51,991 INFO L93 Difference]: Finished difference Result 34671 states and 36875 transitions. [2021-12-21 11:16:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:16:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 821 [2021-12-21 11:16:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:16:52,085 INFO L225 Difference]: With dead ends: 34671 [2021-12-21 11:16:52,086 INFO L226 Difference]: Without dead ends: 17501 [2021-12-21 11:16:52,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:16:52,091 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 306 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:16:52,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 381 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:16:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17501 states. [2021-12-21 11:16:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17501 to 17172. [2021-12-21 11:16:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17172 states, 17171 states have (on average 1.0557335041639975) internal successors, (18128), 17171 states have internal predecessors, (18128), 0 states have call successors, (0), 0 states 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 11:16:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17172 states to 17172 states and 18128 transitions. [2021-12-21 11:16:52,239 INFO L78 Accepts]: Start accepts. Automaton has 17172 states and 18128 transitions. Word has length 821 [2021-12-21 11:16:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:16:52,239 INFO L470 AbstractCegarLoop]: Abstraction has 17172 states and 18128 transitions. [2021-12-21 11:16:52,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 11:16:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 17172 states and 18128 transitions. [2021-12-21 11:16:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2021-12-21 11:16:52,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:16:52,256 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 11:16:52,289 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 11:16:52,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:52,474 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:16:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:16:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -38982213, now seen corresponding path program 1 times [2021-12-21 11:16:52,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:16:52,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669316061] [2021-12-21 11:16:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:52,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:16:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 941 proven. 100 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-12-21 11:16:52,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:16:52,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669316061] [2021-12-21 11:16:52,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669316061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:16:52,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318373622] [2021-12-21 11:16:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:16:52,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:16:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:16:52,726 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 11:16:52,727 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 11:16:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:16:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 11:16:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:16:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 249 proven. 851 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-21 11:16:56,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:16:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 308 proven. 792 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-21 11:16:59,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318373622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:16:59,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:16:59,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2021-12-21 11:16:59,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360282723] [2021-12-21 11:16:59,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:16:59,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 11:16:59,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:16:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 11:16:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-21 11:16:59,756 INFO L87 Difference]: Start difference. First operand 17172 states and 18128 transitions. Second operand has 13 states, 13 states have (on average 118.0) internal successors, (1534), 12 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states 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 11:17:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:06,670 INFO L93 Difference]: Finished difference Result 44608 states and 46942 transitions. [2021-12-21 11:17:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 11:17:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 118.0) internal successors, (1534), 12 states have internal predecessors, (1534), 0 states have call successors, (0), 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 869 [2021-12-21 11:17:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:06,699 INFO L225 Difference]: With dead ends: 44608 [2021-12-21 11:17:06,699 INFO L226 Difference]: Without dead ends: 27645 [2021-12-21 11:17:06,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1765 GetRequests, 1729 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 11:17:06,713 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5132 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 11452 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5132 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 12532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 11452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:06,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5132 Valid, 139 Invalid, 12532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 11452 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-21 11:17:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27645 states. [2021-12-21 11:17:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27645 to 22107. [2021-12-21 11:17:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22107 states, 22106 states have (on average 1.0499864290237944) internal successors, (23211), 22106 states have internal predecessors, (23211), 0 states have call successors, (0), 0 states 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 11:17:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22107 states to 22107 states and 23211 transitions. [2021-12-21 11:17:07,020 INFO L78 Accepts]: Start accepts. Automaton has 22107 states and 23211 transitions. Word has length 869 [2021-12-21 11:17:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:07,021 INFO L470 AbstractCegarLoop]: Abstraction has 22107 states and 23211 transitions. [2021-12-21 11:17:07,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 118.0) internal successors, (1534), 12 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states 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 11:17:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 22107 states and 23211 transitions. [2021-12-21 11:17:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2021-12-21 11:17:07,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:07,036 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 11:17:07,056 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 11:17:07,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 11:17:07,255 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1660609336, now seen corresponding path program 1 times [2021-12-21 11:17:07,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:07,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628621999] [2021-12-21 11:17:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:07,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 1131 proven. 258 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-21 11:17:07,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:07,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628621999] [2021-12-21 11:17:07,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628621999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570018244] [2021-12-21 11:17:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:07,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:07,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:07,643 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 11:17:07,644 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 11:17:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 11:17:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:17:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 938 proven. 202 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-21 11:17:10,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:17:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 938 proven. 202 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-21 11:17:13,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570018244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:17:13,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:17:13,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-21 11:17:13,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352695928] [2021-12-21 11:17:13,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:17:13,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 11:17:13,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:13,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 11:17:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-21 11:17:13,103 INFO L87 Difference]: Start difference. First operand 22107 states and 23211 transitions. Second operand has 12 states, 12 states have (on average 130.58333333333334) internal successors, (1567), 11 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states 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 11:17:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:17,238 INFO L93 Difference]: Finished difference Result 44394 states and 46608 transitions. [2021-12-21 11:17:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 11:17:17,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 130.58333333333334) internal successors, (1567), 11 states have internal predecessors, (1567), 0 states have call successors, (0), 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 971 [2021-12-21 11:17:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:17,288 INFO L225 Difference]: With dead ends: 44394 [2021-12-21 11:17:17,288 INFO L226 Difference]: Without dead ends: 22618 [2021-12-21 11:17:17,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1936 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 11:17:17,332 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4475 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 9443 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4475 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 9924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 9443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:17,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4475 Valid, 147 Invalid, 9924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 9443 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-21 11:17:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22618 states. [2021-12-21 11:17:17,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22618 to 21120. [2021-12-21 11:17:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21120 states, 21119 states have (on average 1.045693451394479) internal successors, (22084), 21119 states have internal predecessors, (22084), 0 states have call successors, (0), 0 states 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 11:17:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21120 states to 21120 states and 22084 transitions. [2021-12-21 11:17:17,746 INFO L78 Accepts]: Start accepts. Automaton has 21120 states and 22084 transitions. Word has length 971 [2021-12-21 11:17:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:17,746 INFO L470 AbstractCegarLoop]: Abstraction has 21120 states and 22084 transitions. [2021-12-21 11:17:17,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.58333333333334) internal successors, (1567), 11 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states 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 11:17:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 21120 states and 22084 transitions. [2021-12-21 11:17:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2021-12-21 11:17:17,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:17,772 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, 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, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:17:17,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 11:17:17,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 11:17:17,988 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash 484801574, now seen corresponding path program 1 times [2021-12-21 11:17:17,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:17,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073264352] [2021-12-21 11:17:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:17,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 1447 proven. 0 refuted. 0 times theorem prover too weak. 821 trivial. 0 not checked. [2021-12-21 11:17:18,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073264352] [2021-12-21 11:17:18,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073264352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:18,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:18,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:18,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371994995] [2021-12-21 11:17:18,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:18,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:18,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:18,210 INFO L87 Difference]: Start difference. First operand 21120 states and 22084 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 11:17:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:19,000 INFO L93 Difference]: Finished difference Result 41909 states and 43835 transitions. [2021-12-21 11:17:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 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 1051 [2021-12-21 11:17:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:19,019 INFO L225 Difference]: With dead ends: 41909 [2021-12-21 11:17:19,019 INFO L226 Difference]: Without dead ends: 21120 [2021-12-21 11:17:19,031 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 11:17:19,033 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:19,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 447 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2021-12-21 11:17:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 19475. [2021-12-21 11:17:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19475 states, 19474 states have (on average 1.0340967443771183) internal successors, (20138), 19474 states have internal predecessors, (20138), 0 states have call successors, (0), 0 states 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 11:17:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19475 states to 19475 states and 20138 transitions. [2021-12-21 11:17:19,390 INFO L78 Accepts]: Start accepts. Automaton has 19475 states and 20138 transitions. Word has length 1051 [2021-12-21 11:17:19,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:19,390 INFO L470 AbstractCegarLoop]: Abstraction has 19475 states and 20138 transitions. [2021-12-21 11:17:19,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 11:17:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19475 states and 20138 transitions. [2021-12-21 11:17:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1089 [2021-12-21 11:17:19,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:19,420 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, 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, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:17:19,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:17:19,420 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1330054839, now seen corresponding path program 1 times [2021-12-21 11:17:19,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:19,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481052784] [2021-12-21 11:17:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:19,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 2045 trivial. 0 not checked. [2021-12-21 11:17:19,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:19,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481052784] [2021-12-21 11:17:19,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481052784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:19,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:19,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:19,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455166560] [2021-12-21 11:17:19,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:19,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:19,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:19,753 INFO L87 Difference]: Start difference. First operand 19475 states and 20138 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 11:17:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:20,546 INFO L93 Difference]: Finished difference Result 38619 states and 39943 transitions. [2021-12-21 11:17:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 1088 [2021-12-21 11:17:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:20,562 INFO L225 Difference]: With dead ends: 38619 [2021-12-21 11:17:20,562 INFO L226 Difference]: Without dead ends: 19475 [2021-12-21 11:17:20,572 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 11:17:20,574 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 271 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:20,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 439 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2021-12-21 11:17:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 18817. [2021-12-21 11:17:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18817 states, 18816 states have (on average 1.0257759353741496) internal successors, (19301), 18816 states have internal predecessors, (19301), 0 states have call successors, (0), 0 states 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 11:17:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18817 states to 18817 states and 19301 transitions. [2021-12-21 11:17:20,723 INFO L78 Accepts]: Start accepts. Automaton has 18817 states and 19301 transitions. Word has length 1088 [2021-12-21 11:17:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:20,724 INFO L470 AbstractCegarLoop]: Abstraction has 18817 states and 19301 transitions. [2021-12-21 11:17:20,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 11:17:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 18817 states and 19301 transitions. [2021-12-21 11:17:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1201 [2021-12-21 11:17:20,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:20,739 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, 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, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:20,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:17:20,739 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2016459313, now seen corresponding path program 1 times [2021-12-21 11:17:20,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:20,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566043680] [2021-12-21 11:17:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:20,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 2074 trivial. 0 not checked. [2021-12-21 11:17:21,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566043680] [2021-12-21 11:17:21,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566043680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:21,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:21,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:17:21,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906151165] [2021-12-21 11:17:21,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:21,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:17:21,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:21,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:17:21,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:17:21,098 INFO L87 Difference]: Start difference. First operand 18817 states and 19301 transitions. Second operand has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 11:17:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:22,259 INFO L93 Difference]: Finished difference Result 40288 states and 41317 transitions. [2021-12-21 11:17:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:17:22,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 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 1200 [2021-12-21 11:17:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:22,277 INFO L225 Difference]: With dead ends: 40288 [2021-12-21 11:17:22,277 INFO L226 Difference]: Without dead ends: 20791 [2021-12-21 11:17:22,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:17:22,289 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 605 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:22,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 64 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:17:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20791 states. [2021-12-21 11:17:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20791 to 18159. [2021-12-21 11:17:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18159 states, 18158 states have (on average 1.0253331864742814) internal successors, (18618), 18158 states have internal predecessors, (18618), 0 states have call successors, (0), 0 states 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 11:17:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18159 states to 18159 states and 18618 transitions. [2021-12-21 11:17:22,449 INFO L78 Accepts]: Start accepts. Automaton has 18159 states and 18618 transitions. Word has length 1200 [2021-12-21 11:17:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:22,454 INFO L470 AbstractCegarLoop]: Abstraction has 18159 states and 18618 transitions. [2021-12-21 11:17:22,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 11:17:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 18159 states and 18618 transitions. [2021-12-21 11:17:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1256 [2021-12-21 11:17:22,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:22,472 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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:22,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 11:17:22,472 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1267286605, now seen corresponding path program 1 times [2021-12-21 11:17:22,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:22,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918548387] [2021-12-21 11:17:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:22,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3242 backedges. 1921 proven. 0 refuted. 0 times theorem prover too weak. 1321 trivial. 0 not checked. [2021-12-21 11:17:23,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:23,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918548387] [2021-12-21 11:17:23,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918548387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:23,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:23,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414615964] [2021-12-21 11:17:23,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:23,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:23,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:23,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:23,065 INFO L87 Difference]: Start difference. First operand 18159 states and 18618 transitions. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 11:17:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:23,904 INFO L93 Difference]: Finished difference Result 41580 states and 42656 transitions. [2021-12-21 11:17:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 1255 [2021-12-21 11:17:23,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:23,924 INFO L225 Difference]: With dead ends: 41580 [2021-12-21 11:17:23,924 INFO L226 Difference]: Without dead ends: 21778 [2021-12-21 11:17:23,936 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 11:17:23,936 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 207 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:23,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 433 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21778 states. [2021-12-21 11:17:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21778 to 21120. [2021-12-21 11:17:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21120 states, 21119 states have (on average 1.0192717458212983) internal successors, (21526), 21119 states have internal predecessors, (21526), 0 states have call successors, (0), 0 states 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 11:17:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21120 states to 21120 states and 21526 transitions. [2021-12-21 11:17:24,135 INFO L78 Accepts]: Start accepts. Automaton has 21120 states and 21526 transitions. Word has length 1255 [2021-12-21 11:17:24,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:24,136 INFO L470 AbstractCegarLoop]: Abstraction has 21120 states and 21526 transitions. [2021-12-21 11:17:24,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 11:17:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21120 states and 21526 transitions. [2021-12-21 11:17:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1530 [2021-12-21 11:17:24,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:24,182 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, 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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:24,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 11:17:24,183 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:24,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:24,183 INFO L85 PathProgramCache]: Analyzing trace with hash 158822930, now seen corresponding path program 1 times [2021-12-21 11:17:24,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:24,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182496615] [2021-12-21 11:17:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:24,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5206 backedges. 2562 proven. 0 refuted. 0 times theorem prover too weak. 2644 trivial. 0 not checked. [2021-12-21 11:17:24,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:24,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182496615] [2021-12-21 11:17:24,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182496615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:24,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:24,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:24,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544373960] [2021-12-21 11:17:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:24,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:24,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:24,530 INFO L87 Difference]: Start difference. First operand 21120 states and 21526 transitions. Second operand has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 11:17:25,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:25,309 INFO L93 Difference]: Finished difference Result 43883 states and 44765 transitions. [2021-12-21 11:17:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:25,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 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 1529 [2021-12-21 11:17:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:25,328 INFO L225 Difference]: With dead ends: 43883 [2021-12-21 11:17:25,328 INFO L226 Difference]: Without dead ends: 21120 [2021-12-21 11:17:25,340 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 11:17:25,340 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 205 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:25,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 419 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:17:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2021-12-21 11:17:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 19804. [2021-12-21 11:17:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19804 states, 19803 states have (on average 1.0173711053880725) internal successors, (20147), 19803 states have internal predecessors, (20147), 0 states have call successors, (0), 0 states 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 11:17:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19804 states to 19804 states and 20147 transitions. [2021-12-21 11:17:25,523 INFO L78 Accepts]: Start accepts. Automaton has 19804 states and 20147 transitions. Word has length 1529 [2021-12-21 11:17:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:25,524 INFO L470 AbstractCegarLoop]: Abstraction has 19804 states and 20147 transitions. [2021-12-21 11:17:25,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 11:17:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 19804 states and 20147 transitions. [2021-12-21 11:17:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1557 [2021-12-21 11:17:25,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:25,548 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, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 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, 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] [2021-12-21 11:17:25,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 11:17:25,548 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:25,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1952310525, now seen corresponding path program 1 times [2021-12-21 11:17:25,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:25,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305391866] [2021-12-21 11:17:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:25,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat