./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem15_label44.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 615f5d053860bb060d59c74904029b4b08523188eca53d2f384305e3b3f0c7ed --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:52:15,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:52:15,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:52:15,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:52:15,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:52:15,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:52:15,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:52:15,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:52:15,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:52:15,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:52:15,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:52:15,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:52:15,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:52:15,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:52:15,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:52:15,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:52:15,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:52:15,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:52:15,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:52:15,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:52:15,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:52:15,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:52:15,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:52:15,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:52:15,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:52:15,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:52:15,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:52:15,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:52:15,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:52:15,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:52:15,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:52:15,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:52:15,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:52:15,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:52:15,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:52:15,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:52:15,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:52:15,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:52:15,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:52:15,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:52:15,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:52:15,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:52:15,904 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:52:15,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:52:15,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:52:15,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:52:15,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:52:15,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:52:15,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:52:15,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:52:15,907 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:52:15,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:52:15,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:52:15,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:52:15,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:52:15,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:52:15,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:52:15,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:52:15,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:52:15,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:52:15,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:52:15,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:52:15,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:52:15,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:52:15,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:52:15,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:52:15,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:52:15,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:52:15,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:52:15,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:52:15,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:52:15,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:52:15,912 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:52:15,912 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:52:15,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:52:15,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:52:15,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 615f5d053860bb060d59c74904029b4b08523188eca53d2f384305e3b3f0c7ed [2021-12-15 09:52:16,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:52:16,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:52:16,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:52:16,147 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:52:16,148 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:52:16,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label44.c [2021-12-15 09:52:16,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9616b23e6/16eacf2fbbc1486fba1c8f6170f862e8/FLAGb66216292 [2021-12-15 09:52:16,746 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:52:16,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label44.c [2021-12-15 09:52:16,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9616b23e6/16eacf2fbbc1486fba1c8f6170f862e8/FLAGb66216292 [2021-12-15 09:52:17,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9616b23e6/16eacf2fbbc1486fba1c8f6170f862e8 [2021-12-15 09:52:17,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:52:17,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:52:17,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:52:17,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:52:17,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:52:17,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:52:17" (1/1) ... [2021-12-15 09:52:17,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20c91459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:17, skipping insertion in model container [2021-12-15 09:52:17,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:52:17" (1/1) ... [2021-12-15 09:52:17,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:52:17,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:52:17,497 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/Problem15_label44.c[8025,8038] [2021-12-15 09:52:17,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:52:17,837 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:52:17,876 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/Problem15_label44.c[8025,8038] [2021-12-15 09:52:18,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:52:18,053 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:52:18,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18 WrapperNode [2021-12-15 09:52:18,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:52:18,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:52:18,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:52:18,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:52:18,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,281 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-15 09:52:18,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:52:18,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:52:18,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:52:18,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:52:18,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:52:18,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:52:18,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:52:18,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:52:18,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (1/1) ... [2021-12-15 09:52:18,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:52:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:18,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:52:18,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:52:18,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:52:18,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:52:18,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:52:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:52:18,598 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:52:18,600 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:52:20,829 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:52:20,841 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:52:20,841 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:52:20,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:52:20 BoogieIcfgContainer [2021-12-15 09:52:20,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:52:20,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:52:20,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:52:20,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:52:20,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:52:17" (1/3) ... [2021-12-15 09:52:20,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c056ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:52:20, skipping insertion in model container [2021-12-15 09:52:20,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:18" (2/3) ... [2021-12-15 09:52:20,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c056ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:52:20, skipping insertion in model container [2021-12-15 09:52:20,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:52:20" (3/3) ... [2021-12-15 09:52:20,851 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label44.c [2021-12-15 09:52:20,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:52:20,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:52:20,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:52:20,907 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:52:20,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:52:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 09:52:20,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:20,932 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, 1, 1, 1, 1, 1] [2021-12-15 09:52:20,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2021-12-15 09:52:20,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245502660] [2021-12-15 09:52:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:20,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:21,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245502660] [2021-12-15 09:52:21,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245502660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:21,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:21,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:21,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572972490] [2021-12-15 09:52:21,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:21,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:21,237 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:23,187 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2021-12-15 09:52:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:23,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 09:52:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:23,202 INFO L225 Difference]: With dead ends: 1154 [2021-12-15 09:52:23,203 INFO L226 Difference]: Without dead ends: 665 [2021-12-15 09:52:23,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:23,210 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 255 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:23,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:52:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-15 09:52:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2021-12-15 09:52:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2021-12-15 09:52:23,282 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 66 [2021-12-15 09:52:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:23,283 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2021-12-15 09:52:23,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2021-12-15 09:52:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-15 09:52:23,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:23,287 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:23,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:52:23,288 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash 333594229, now seen corresponding path program 1 times [2021-12-15 09:52:23,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:23,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816012528] [2021-12-15 09:52:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:23,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:23,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816012528] [2021-12-15 09:52:23,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816012528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:23,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:23,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:23,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602837709] [2021-12-15 09:52:23,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:23,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:23,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:23,399 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:25,189 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2021-12-15 09:52:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-15 09:52:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:25,194 INFO L225 Difference]: With dead ends: 1624 [2021-12-15 09:52:25,194 INFO L226 Difference]: Without dead ends: 963 [2021-12-15 09:52:25,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:25,201 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:25,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 09:52:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-15 09:52:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-12-15 09:52:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2021-12-15 09:52:25,248 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 131 [2021-12-15 09:52:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:25,249 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2021-12-15 09:52:25,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2021-12-15 09:52:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-15 09:52:25,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:25,253 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:25,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:52:25,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1428135620, now seen corresponding path program 1 times [2021-12-15 09:52:25,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:25,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991204647] [2021-12-15 09:52:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:25,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:25,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:25,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991204647] [2021-12-15 09:52:25,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991204647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:25,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:25,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:52:25,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224962545] [2021-12-15 09:52:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:25,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:52:25,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:52:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:52:25,421 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:27,494 INFO L93 Difference]: Finished difference Result 2248 states and 3205 transitions. [2021-12-15 09:52:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:52:27,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-15 09:52:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:27,501 INFO L225 Difference]: With dead ends: 2248 [2021-12-15 09:52:27,501 INFO L226 Difference]: Without dead ends: 1586 [2021-12-15 09:52:27,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:52:27,503 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 398 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:27,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 339 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:52:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-12-15 09:52:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1266. [2021-12-15 09:52:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2021-12-15 09:52:27,527 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 136 [2021-12-15 09:52:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:27,528 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2021-12-15 09:52:27,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2021-12-15 09:52:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-15 09:52:27,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:27,532 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:27,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:52:27,533 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash 461226345, now seen corresponding path program 1 times [2021-12-15 09:52:27,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129516658] [2021-12-15 09:52:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:27,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 09:52:27,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:27,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129516658] [2021-12-15 09:52:27,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129516658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:27,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:27,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:27,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239469656] [2021-12-15 09:52:27,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:27,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:27,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:27,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:27,668 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:29,011 INFO L93 Difference]: Finished difference Result 3436 states and 4550 transitions. [2021-12-15 09:52:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 232 [2021-12-15 09:52:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:29,020 INFO L225 Difference]: With dead ends: 3436 [2021-12-15 09:52:29,020 INFO L226 Difference]: Without dead ends: 2172 [2021-12-15 09:52:29,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:29,023 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:29,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-12-15 09:52:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2168. [2021-12-15 09:52:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 1.2344254730041533) internal successors, (2675), 2167 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 2675 transitions. [2021-12-15 09:52:29,059 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 2675 transitions. Word has length 232 [2021-12-15 09:52:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:29,060 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 2675 transitions. [2021-12-15 09:52:29,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 2675 transitions. [2021-12-15 09:52:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-12-15 09:52:29,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:29,065 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:29,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:52:29,066 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1527180443, now seen corresponding path program 1 times [2021-12-15 09:52:29,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:29,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471460725] [2021-12-15 09:52:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:29,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:52:29,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:29,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471460725] [2021-12-15 09:52:29,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471460725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:29,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:29,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:52:29,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909683541] [2021-12-15 09:52:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:29,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:29,229 INFO L87 Difference]: Start difference. First operand 2168 states and 2675 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:30,502 INFO L93 Difference]: Finished difference Result 4633 states and 5659 transitions. [2021-12-15 09:52:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 338 [2021-12-15 09:52:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:30,512 INFO L225 Difference]: With dead ends: 4633 [2021-12-15 09:52:30,513 INFO L226 Difference]: Without dead ends: 2467 [2021-12-15 09:52:30,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:30,516 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:30,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:52:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-12-15 09:52:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2467. [2021-12-15 09:52:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 1.208434712084347) internal successors, (2980), 2466 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 2980 transitions. [2021-12-15 09:52:30,558 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 2980 transitions. Word has length 338 [2021-12-15 09:52:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:30,559 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 2980 transitions. [2021-12-15 09:52:30,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 2980 transitions. [2021-12-15 09:52:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-15 09:52:30,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:30,564 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:30,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:52:30,565 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:30,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash -387591370, now seen corresponding path program 1 times [2021-12-15 09:52:30,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:30,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461380343] [2021-12-15 09:52:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:30,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 09:52:30,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461380343] [2021-12-15 09:52:30,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461380343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:30,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:30,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:30,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373897239] [2021-12-15 09:52:30,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:30,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:30,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:30,730 INFO L87 Difference]: Start difference. First operand 2467 states and 2980 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:32,142 INFO L93 Difference]: Finished difference Result 5232 states and 6542 transitions. [2021-12-15 09:52:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:32,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 353 [2021-12-15 09:52:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:32,153 INFO L225 Difference]: With dead ends: 5232 [2021-12-15 09:52:32,153 INFO L226 Difference]: Without dead ends: 3066 [2021-12-15 09:52:32,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:32,157 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 249 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:32,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:52:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-12-15 09:52:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2165. [2021-12-15 09:52:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 1.2310536044362292) internal successors, (2664), 2164 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 2664 transitions. [2021-12-15 09:52:32,196 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 2664 transitions. Word has length 353 [2021-12-15 09:52:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:32,197 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 2664 transitions. [2021-12-15 09:52:32,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 2664 transitions. [2021-12-15 09:52:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-12-15 09:52:32,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:32,203 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:32,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:52:32,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1227352119, now seen corresponding path program 1 times [2021-12-15 09:52:32,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:32,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132378982] [2021-12-15 09:52:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:32,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-15 09:52:32,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132378982] [2021-12-15 09:52:32,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132378982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:32,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:32,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:32,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386981652] [2021-12-15 09:52:32,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:32,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:32,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:32,445 INFO L87 Difference]: Start difference. First operand 2165 states and 2664 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:33,903 INFO L93 Difference]: Finished difference Result 5239 states and 6634 transitions. [2021-12-15 09:52:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 412 [2021-12-15 09:52:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:33,915 INFO L225 Difference]: With dead ends: 5239 [2021-12-15 09:52:33,916 INFO L226 Difference]: Without dead ends: 3375 [2021-12-15 09:52:33,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:33,919 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 329 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:33,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 195 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:52:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-12-15 09:52:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2473. [2021-12-15 09:52:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 1.2823624595469256) internal successors, (3170), 2472 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3170 transitions. [2021-12-15 09:52:33,960 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3170 transitions. Word has length 412 [2021-12-15 09:52:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:33,961 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 3170 transitions. [2021-12-15 09:52:33,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3170 transitions. [2021-12-15 09:52:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-12-15 09:52:33,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:33,967 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:33,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:52:33,967 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:33,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2078614052, now seen corresponding path program 1 times [2021-12-15 09:52:33,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:33,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536729221] [2021-12-15 09:52:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:33,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 127 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:34,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536729221] [2021-12-15 09:52:34,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536729221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658192249] [2021-12-15 09:52:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:34,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:34,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:34,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:52:34,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:52:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:52:34,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:52:35,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:52:35,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658192249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:35,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:52:35,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:52:35,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349996835] [2021-12-15 09:52:35,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:35,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:35,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:52:35,154 INFO L87 Difference]: Start difference. First operand 2473 states and 3170 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:36,422 INFO L93 Difference]: Finished difference Result 5246 states and 6745 transitions. [2021-12-15 09:52:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 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 417 [2021-12-15 09:52:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:36,440 INFO L225 Difference]: With dead ends: 5246 [2021-12-15 09:52:36,440 INFO L226 Difference]: Without dead ends: 3074 [2021-12-15 09:52:36,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:52:36,443 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 256 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:36,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 307 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:52:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-12-15 09:52:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 3071. [2021-12-15 09:52:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 3070 states have (on average 1.1837133550488599) internal successors, (3634), 3070 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 3634 transitions. [2021-12-15 09:52:36,485 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 3634 transitions. Word has length 417 [2021-12-15 09:52:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:36,486 INFO L470 AbstractCegarLoop]: Abstraction has 3071 states and 3634 transitions. [2021-12-15 09:52:36,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 3634 transitions. [2021-12-15 09:52:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-15 09:52:36,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:36,492 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:36,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:52:36,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:36,720 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:36,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1305480874, now seen corresponding path program 1 times [2021-12-15 09:52:36,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:36,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554791088] [2021-12-15 09:52:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:36,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 09:52:36,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:36,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554791088] [2021-12-15 09:52:36,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554791088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:36,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:36,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:36,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142610296] [2021-12-15 09:52:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:36,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:36,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:36,866 INFO L87 Difference]: Start difference. First operand 3071 states and 3634 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:38,208 INFO L93 Difference]: Finished difference Result 6742 states and 8171 transitions. [2021-12-15 09:52:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 434 [2021-12-15 09:52:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:38,222 INFO L225 Difference]: With dead ends: 6742 [2021-12-15 09:52:38,222 INFO L226 Difference]: Without dead ends: 3972 [2021-12-15 09:52:38,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:38,226 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 245 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:38,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 620 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-12-15 09:52:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 3971. [2021-12-15 09:52:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3971 states, 3970 states have (on average 1.1642317380352645) internal successors, (4622), 3970 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 4622 transitions. [2021-12-15 09:52:38,277 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 4622 transitions. Word has length 434 [2021-12-15 09:52:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:38,278 INFO L470 AbstractCegarLoop]: Abstraction has 3971 states and 4622 transitions. [2021-12-15 09:52:38,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 4622 transitions. [2021-12-15 09:52:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-12-15 09:52:38,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:38,283 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, 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, 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] [2021-12-15 09:52:38,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:52:38,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1447157885, now seen corresponding path program 1 times [2021-12-15 09:52:38,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:38,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084172068] [2021-12-15 09:52:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:38,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-15 09:52:38,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:38,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084172068] [2021-12-15 09:52:38,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084172068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:38,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:38,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:38,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655306304] [2021-12-15 09:52:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:38,476 INFO L87 Difference]: Start difference. First operand 3971 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:39,795 INFO L93 Difference]: Finished difference Result 8837 states and 10542 transitions. [2021-12-15 09:52:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 530 [2021-12-15 09:52:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:39,813 INFO L225 Difference]: With dead ends: 8837 [2021-12-15 09:52:39,813 INFO L226 Difference]: Without dead ends: 5167 [2021-12-15 09:52:39,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:39,818 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 351 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:39,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 449 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:52:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2021-12-15 09:52:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 5167. [2021-12-15 09:52:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5167 states, 5166 states have (on average 1.1852497096399535) internal successors, (6123), 5166 states have internal predecessors, (6123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 6123 transitions. [2021-12-15 09:52:39,926 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 6123 transitions. Word has length 530 [2021-12-15 09:52:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:39,927 INFO L470 AbstractCegarLoop]: Abstraction has 5167 states and 6123 transitions. [2021-12-15 09:52:39,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 6123 transitions. [2021-12-15 09:52:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2021-12-15 09:52:39,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:39,941 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, 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:39,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:52:39,942 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1866992391, now seen corresponding path program 1 times [2021-12-15 09:52:39,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:39,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837400948] [2021-12-15 09:52:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:39,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 624 proven. 39 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 09:52:40,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837400948] [2021-12-15 09:52:40,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837400948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908203091] [2021-12-15 09:52:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:40,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:40,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:40,164 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) [2021-12-15 09:52:40,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:52:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:40,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 09:52:40,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 624 proven. 39 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 09:52:41,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:52:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 624 proven. 39 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 09:52:43,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908203091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:52:43,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:52:43,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 09:52:43,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324892930] [2021-12-15 09:52:43,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:52:43,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:52:43,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:52:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:52:43,061 INFO L87 Difference]: Start difference. First operand 5167 states and 6123 transitions. Second operand has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:48,224 INFO L93 Difference]: Finished difference Result 15676 states and 18372 transitions. [2021-12-15 09:52:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 09:52:48,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 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 621 [2021-12-15 09:52:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:48,242 INFO L225 Difference]: With dead ends: 15676 [2021-12-15 09:52:48,242 INFO L226 Difference]: Without dead ends: 7560 [2021-12-15 09:52:48,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1251 GetRequests, 1237 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-15 09:52:48,250 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 3103 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 5794 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 6551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 5794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:48,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3103 Valid, 278 Invalid, 6551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 5794 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-15 09:52:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7560 states. [2021-12-15 09:52:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7560 to 5763. [2021-12-15 09:52:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5763 states, 5762 states have (on average 1.0807011454356126) internal successors, (6227), 5762 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 6227 transitions. [2021-12-15 09:52:48,320 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 6227 transitions. Word has length 621 [2021-12-15 09:52:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:48,321 INFO L470 AbstractCegarLoop]: Abstraction has 5763 states and 6227 transitions. [2021-12-15 09:52:48,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 6227 transitions. [2021-12-15 09:52:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2021-12-15 09:52:48,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:48,328 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, 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, 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] [2021-12-15 09:52:48,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 09:52:48,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 09:52:48,544 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:48,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1111780767, now seen corresponding path program 1 times [2021-12-15 09:52:48,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:48,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302554644] [2021-12-15 09:52:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:48,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 478 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-12-15 09:52:48,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:48,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302554644] [2021-12-15 09:52:48,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302554644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:48,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:48,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:48,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239474602] [2021-12-15 09:52:48,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:48,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:48,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:48,760 INFO L87 Difference]: Start difference. First operand 5763 states and 6227 transitions. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:49,598 INFO L93 Difference]: Finished difference Result 11223 states and 12149 transitions. [2021-12-15 09:52:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:49,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 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 663 [2021-12-15 09:52:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:49,609 INFO L225 Difference]: With dead ends: 11223 [2021-12-15 09:52:49,609 INFO L226 Difference]: Without dead ends: 5761 [2021-12-15 09:52:49,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:49,614 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 438 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:49,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 70 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:52:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-12-15 09:52:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 5761. [2021-12-15 09:52:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 1.0803819444444445) internal successors, (6223), 5760 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 6223 transitions. [2021-12-15 09:52:49,674 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 6223 transitions. Word has length 663 [2021-12-15 09:52:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:49,674 INFO L470 AbstractCegarLoop]: Abstraction has 5761 states and 6223 transitions. [2021-12-15 09:52:49,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 6223 transitions. [2021-12-15 09:52:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2021-12-15 09:52:49,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:49,681 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:49,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:52:49,682 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash 696170776, now seen corresponding path program 1 times [2021-12-15 09:52:49,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:49,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753590873] [2021-12-15 09:52:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:49,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 447 proven. 335 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 09:52:49,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753590873] [2021-12-15 09:52:49,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753590873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757135691] [2021-12-15 09:52:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:49,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:49,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:49,980 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) [2021-12-15 09:52:49,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:52:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:50,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:52:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 592 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-15 09:52:51,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:52:51,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757135691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:51,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:52:51,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:52:51,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188810294] [2021-12-15 09:52:51,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:51,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:51,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:52:51,043 INFO L87 Difference]: Start difference. First operand 5761 states and 6223 transitions. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:51,886 INFO L93 Difference]: Finished difference Result 11222 states and 12145 transitions. [2021-12-15 09:52:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:51,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 676 [2021-12-15 09:52:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:51,893 INFO L225 Difference]: With dead ends: 11222 [2021-12-15 09:52:51,894 INFO L226 Difference]: Without dead ends: 5762 [2021-12-15 09:52:51,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:52:51,898 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 233 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:51,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 400 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:52:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5762 states. [2021-12-15 09:52:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5762 to 5758. [2021-12-15 09:52:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5758 states, 5757 states have (on average 1.0689595275317005) internal successors, (6154), 5757 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5758 states to 5758 states and 6154 transitions. [2021-12-15 09:52:51,955 INFO L78 Accepts]: Start accepts. Automaton has 5758 states and 6154 transitions. Word has length 676 [2021-12-15 09:52:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:51,956 INFO L470 AbstractCegarLoop]: Abstraction has 5758 states and 6154 transitions. [2021-12-15 09:52:51,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5758 states and 6154 transitions. [2021-12-15 09:52:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2021-12-15 09:52:51,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:51,963 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:51,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:52:52,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:52,185 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1189188974, now seen corresponding path program 1 times [2021-12-15 09:52:52,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:52,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595905158] [2021-12-15 09:52:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:52,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 545 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 09:52:52,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:52,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595905158] [2021-12-15 09:52:52,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595905158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:52,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:52,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:52,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161002743] [2021-12-15 09:52:52,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:52,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:52,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:52,439 INFO L87 Difference]: Start difference. First operand 5758 states and 6154 transitions. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:53,363 INFO L93 Difference]: Finished difference Result 13318 states and 14263 transitions. [2021-12-15 09:52:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 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 691 [2021-12-15 09:52:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:53,373 INFO L225 Difference]: With dead ends: 13318 [2021-12-15 09:52:53,373 INFO L226 Difference]: Without dead ends: 7562 [2021-12-15 09:52:53,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:53,377 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:53,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 499 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:52:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2021-12-15 09:52:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 7561. [2021-12-15 09:52:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7561 states, 7560 states have (on average 1.0624338624338625) internal successors, (8032), 7560 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7561 states to 7561 states and 8032 transitions. [2021-12-15 09:52:53,447 INFO L78 Accepts]: Start accepts. Automaton has 7561 states and 8032 transitions. Word has length 691 [2021-12-15 09:52:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:53,448 INFO L470 AbstractCegarLoop]: Abstraction has 7561 states and 8032 transitions. [2021-12-15 09:52:53,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7561 states and 8032 transitions. [2021-12-15 09:52:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2021-12-15 09:52:53,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:53,456 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:53,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:52:53,456 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2083360250, now seen corresponding path program 1 times [2021-12-15 09:52:53,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:53,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257946732] [2021-12-15 09:52:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:53,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 635 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:52:53,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:53,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257946732] [2021-12-15 09:52:53,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257946732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:52:53,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144383546] [2021-12-15 09:52:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:53,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:52:53,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:52:53,688 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) [2021-12-15 09:52:53,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:52:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:52:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:52:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2021-12-15 09:52:56,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:52:56,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144383546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:56,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:52:56,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:52:56,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90940922] [2021-12-15 09:52:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:56,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:56,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:52:56,952 INFO L87 Difference]: Start difference. First operand 7561 states and 8032 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:56,974 INFO L93 Difference]: Finished difference Result 7627 states and 8098 transitions. [2021-12-15 09:52:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 [2021-12-15 09:52:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:56,983 INFO L225 Difference]: With dead ends: 7627 [2021-12-15 09:52:56,983 INFO L226 Difference]: Without dead ends: 7625 [2021-12-15 09:52:56,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:52:56,987 INFO L933 BasicCegarLoop]: 500 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:56,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 538 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 519 Unchecked, 0.0s Time] [2021-12-15 09:52:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7625 states. [2021-12-15 09:52:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7625 to 7625. [2021-12-15 09:52:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 1.061909758656873) internal successors, (8096), 7624 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 8096 transitions. [2021-12-15 09:52:57,062 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 8096 transitions. Word has length 698 [2021-12-15 09:52:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:57,062 INFO L470 AbstractCegarLoop]: Abstraction has 7625 states and 8096 transitions. [2021-12-15 09:52:57,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 8096 transitions. [2021-12-15 09:52:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2021-12-15 09:52:57,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:57,087 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, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:52:57,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 09:52:57,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 09:52:57,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:57,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1807243530, now seen corresponding path program 1 times [2021-12-15 09:52:57,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:57,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286061767] [2021-12-15 09:52:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:57,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 584 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-15 09:52:57,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:57,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286061767] [2021-12-15 09:52:57,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286061767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:57,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:57,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:57,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993516649] [2021-12-15 09:52:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:57,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:57,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:57,519 INFO L87 Difference]: Start difference. First operand 7625 states and 8096 transitions. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:58,318 INFO L93 Difference]: Finished difference Result 16446 states and 17606 transitions. [2021-12-15 09:52:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:58,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 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 728 [2021-12-15 09:52:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:58,332 INFO L225 Difference]: With dead ends: 16446 [2021-12-15 09:52:58,332 INFO L226 Difference]: Without dead ends: 9122 [2021-12-15 09:52:58,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:58,340 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 190 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:58,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 528 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:52:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2021-12-15 09:52:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 9122. [2021-12-15 09:52:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 1.0584365749369586) internal successors, (9654), 9121 states have internal predecessors, (9654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 9654 transitions. [2021-12-15 09:52:58,466 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 9654 transitions. Word has length 728 [2021-12-15 09:52:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:58,467 INFO L470 AbstractCegarLoop]: Abstraction has 9122 states and 9654 transitions. [2021-12-15 09:52:58,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 9654 transitions. [2021-12-15 09:52:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2021-12-15 09:52:58,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:58,476 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:52:58,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:52:58,476 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash -714080672, now seen corresponding path program 1 times [2021-12-15 09:52:58,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:58,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967223838] [2021-12-15 09:52:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:58,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-15 09:52:58,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:58,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967223838] [2021-12-15 09:52:58,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967223838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:58,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:58,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:58,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797295966] [2021-12-15 09:52:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:58,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:58,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:58,688 INFO L87 Difference]: Start difference. First operand 9122 states and 9654 transitions. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:52:59,592 INFO L93 Difference]: Finished difference Result 20034 states and 21251 transitions. [2021-12-15 09:52:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:52:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 732 [2021-12-15 09:52:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:52:59,608 INFO L225 Difference]: With dead ends: 20034 [2021-12-15 09:52:59,608 INFO L226 Difference]: Without dead ends: 10914 [2021-12-15 09:52:59,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:59,617 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:52:59,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 463 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:52:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-12-15 09:52:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 8814. [2021-12-15 09:52:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8814 states, 8813 states have (on average 1.058209463292863) internal successors, (9326), 8813 states have internal predecessors, (9326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8814 states to 8814 states and 9326 transitions. [2021-12-15 09:52:59,735 INFO L78 Accepts]: Start accepts. Automaton has 8814 states and 9326 transitions. Word has length 732 [2021-12-15 09:52:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:52:59,736 INFO L470 AbstractCegarLoop]: Abstraction has 8814 states and 9326 transitions. [2021-12-15 09:52:59,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:52:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8814 states and 9326 transitions. [2021-12-15 09:52:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2021-12-15 09:52:59,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:52:59,746 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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:52:59,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:52:59,747 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:52:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:52:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash 545763390, now seen corresponding path program 1 times [2021-12-15 09:52:59,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:52:59,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534162213] [2021-12-15 09:52:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:52:59,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:52:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:52:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 551 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-12-15 09:52:59,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:52:59,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534162213] [2021-12-15 09:52:59,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534162213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:52:59,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:52:59,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:52:59,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879325076] [2021-12-15 09:52:59,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:52:59,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:52:59,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:52:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:52:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:52:59,985 INFO L87 Difference]: Start difference. First operand 8814 states and 9326 transitions. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:00,843 INFO L93 Difference]: Finished difference Result 19120 states and 20235 transitions. [2021-12-15 09:53:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:00,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 823 [2021-12-15 09:53:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:00,857 INFO L225 Difference]: With dead ends: 19120 [2021-12-15 09:53:00,857 INFO L226 Difference]: Without dead ends: 10607 [2021-12-15 09:53:00,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:00,865 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 312 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:00,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 517 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:53:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10607 states. [2021-12-15 09:53:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10607 to 10607. [2021-12-15 09:53:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 1.052611729209881) internal successors, (11164), 10606 states have internal predecessors, (11164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 11164 transitions. [2021-12-15 09:53:00,975 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 11164 transitions. Word has length 823 [2021-12-15 09:53:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:00,976 INFO L470 AbstractCegarLoop]: Abstraction has 10607 states and 11164 transitions. [2021-12-15 09:53:00,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 11164 transitions. [2021-12-15 09:53:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2021-12-15 09:53:00,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:00,988 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:00,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:53:00,988 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:00,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:00,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1047886970, now seen corresponding path program 1 times [2021-12-15 09:53:00,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:00,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527042668] [2021-12-15 09:53:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:00,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2021-12-15 09:53:01,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527042668] [2021-12-15 09:53:01,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527042668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:01,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:01,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:01,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151617714] [2021-12-15 09:53:01,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:01,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:01,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:01,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:01,255 INFO L87 Difference]: Start difference. First operand 10607 states and 11164 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:02,214 INFO L93 Difference]: Finished difference Result 26900 states and 28305 transitions. [2021-12-15 09:53:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 844 [2021-12-15 09:53:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:02,232 INFO L225 Difference]: With dead ends: 26900 [2021-12-15 09:53:02,233 INFO L226 Difference]: Without dead ends: 16295 [2021-12-15 09:53:02,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:02,243 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 279 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:02,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 426 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:53:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2021-12-15 09:53:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 14131. [2021-12-15 09:53:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14131 states, 14130 states have (on average 1.0477707006369428) internal successors, (14805), 14130 states have internal predecessors, (14805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14131 states to 14131 states and 14805 transitions. [2021-12-15 09:53:02,392 INFO L78 Accepts]: Start accepts. Automaton has 14131 states and 14805 transitions. Word has length 844 [2021-12-15 09:53:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:02,393 INFO L470 AbstractCegarLoop]: Abstraction has 14131 states and 14805 transitions. [2021-12-15 09:53:02,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 14131 states and 14805 transitions. [2021-12-15 09:53:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2021-12-15 09:53:02,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:02,410 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:02,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:53:02,410 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1617243607, now seen corresponding path program 1 times [2021-12-15 09:53:02,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:02,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476592334] [2021-12-15 09:53:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:02,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 838 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2021-12-15 09:53:02,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:02,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476592334] [2021-12-15 09:53:02,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476592334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:02,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:02,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:02,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417948473] [2021-12-15 09:53:02,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:02,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:02,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:02,816 INFO L87 Difference]: Start difference. First operand 14131 states and 14805 transitions. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:03,665 INFO L93 Difference]: Finished difference Result 32458 states and 33990 transitions. [2021-12-15 09:53:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:03,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 922 [2021-12-15 09:53:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:03,684 INFO L225 Difference]: With dead ends: 32458 [2021-12-15 09:53:03,685 INFO L226 Difference]: Without dead ends: 18628 [2021-12-15 09:53:03,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:03,695 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 52 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:03,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 498 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:53:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18628 states. [2021-12-15 09:53:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18628 to 17421. [2021-12-15 09:53:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17421 states, 17420 states have (on average 1.0451779563719863) internal successors, (18207), 17420 states have internal predecessors, (18207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17421 states to 17421 states and 18207 transitions. [2021-12-15 09:53:03,861 INFO L78 Accepts]: Start accepts. Automaton has 17421 states and 18207 transitions. Word has length 922 [2021-12-15 09:53:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:03,862 INFO L470 AbstractCegarLoop]: Abstraction has 17421 states and 18207 transitions. [2021-12-15 09:53:03,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17421 states and 18207 transitions. [2021-12-15 09:53:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2021-12-15 09:53:03,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:03,917 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:53:03,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 09:53:03,917 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash 53488158, now seen corresponding path program 1 times [2021-12-15 09:53:03,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:03,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473290256] [2021-12-15 09:53:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:03,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-12-15 09:53:04,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:04,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473290256] [2021-12-15 09:53:04,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473290256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:04,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:04,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:04,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442382024] [2021-12-15 09:53:04,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:04,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:04,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:04,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:04,240 INFO L87 Difference]: Start difference. First operand 17421 states and 18207 transitions. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:05,204 INFO L93 Difference]: Finished difference Result 37539 states and 39215 transitions. [2021-12-15 09:53:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 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 998 [2021-12-15 09:53:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:05,219 INFO L225 Difference]: With dead ends: 37539 [2021-12-15 09:53:05,219 INFO L226 Difference]: Without dead ends: 20419 [2021-12-15 09:53:05,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:05,227 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:05,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 172 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:53:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20419 states. [2021-12-15 09:53:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20419 to 19516. [2021-12-15 09:53:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19516 states, 19515 states have (on average 1.0407891365616193) internal successors, (20311), 19515 states have internal predecessors, (20311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19516 states to 19516 states and 20311 transitions. [2021-12-15 09:53:05,441 INFO L78 Accepts]: Start accepts. Automaton has 19516 states and 20311 transitions. Word has length 998 [2021-12-15 09:53:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:05,442 INFO L470 AbstractCegarLoop]: Abstraction has 19516 states and 20311 transitions. [2021-12-15 09:53:05,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 19516 states and 20311 transitions. [2021-12-15 09:53:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2021-12-15 09:53:05,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:05,466 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 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] [2021-12-15 09:53:05,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:53:05,466 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1236328096, now seen corresponding path program 1 times [2021-12-15 09:53:05,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759778642] [2021-12-15 09:53:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:05,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 255 proven. 706 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-12-15 09:53:05,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:05,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759778642] [2021-12-15 09:53:05,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759778642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:05,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296179023] [2021-12-15 09:53:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:05,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:05,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:05,894 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) [2021-12-15 09:53:05,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:53:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:06,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:53:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 64 proven. 897 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-12-15 09:53:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:53:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 255 proven. 706 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-12-15 09:53:09,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296179023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:53:09,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:53:09,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2021-12-15 09:53:09,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472066145] [2021-12-15 09:53:09,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:53:09,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 09:53:09,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:09,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 09:53:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2021-12-15 09:53:09,698 INFO L87 Difference]: Start difference. First operand 19516 states and 20311 transitions. Second operand has 11 states, 11 states have (on average 165.36363636363637) internal successors, (1819), 10 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)