./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label35.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/Problem13_label35.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 bf2e434ddb1157766f0427b524597e37ed925d60033c6d19795be6a9bcd22934 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:44:29,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:44:29,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:44:29,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:44:29,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:44:29,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:44:29,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:44:29,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:44:29,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:44:29,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:44:29,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:44:29,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:44:29,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:44:29,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:44:29,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:44:29,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:44:29,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:44:29,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:44:29,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:44:29,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:44:29,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:44:29,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:44:29,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:44:29,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:44:29,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:44:29,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:44:29,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:44:29,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:44:29,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:44:29,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:44:29,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:44:29,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:44:29,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:44:29,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:44:29,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:44:29,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:44:29,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:44:29,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:44:29,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:44:29,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:44:29,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:44:29,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:44:29,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:44:29,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:44:29,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:44:29,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:44:29,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:44:29,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:44:29,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:44:29,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:44:29,712 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:44:29,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:44:29,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:44:29,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:44:29,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:44:29,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:44:29,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:44:29,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:44:29,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:44:29,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:44:29,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:44:29,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:44:29,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:44:29,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:44:29,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:44:29,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:44:29,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:44:29,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:44:29,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:44:29,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:44:29,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:44:29,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:44:29,716 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:44:29,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:44:29,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:44:29,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:44:29,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf2e434ddb1157766f0427b524597e37ed925d60033c6d19795be6a9bcd22934 [2021-12-15 09:44:29,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:44:29,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:44:29,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:44:29,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:44:29,900 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:44:29,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label35.c [2021-12-15 09:44:29,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741c7a2e5/2f566b555def4fbab94e98c0609289ad/FLAGe70f29720 [2021-12-15 09:44:30,486 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:44:30,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label35.c [2021-12-15 09:44:30,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741c7a2e5/2f566b555def4fbab94e98c0609289ad/FLAGe70f29720 [2021-12-15 09:44:30,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741c7a2e5/2f566b555def4fbab94e98c0609289ad [2021-12-15 09:44:30,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:44:30,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:44:30,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:44:30,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:44:30,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:44:30,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:44:30" (1/1) ... [2021-12-15 09:44:30,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b72a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:30, skipping insertion in model container [2021-12-15 09:44:30,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:44:30" (1/1) ... [2021-12-15 09:44:30,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:44:31,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:44:31,278 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label35.c[1793,1806] [2021-12-15 09:44:31,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:44:31,941 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:44:31,957 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label35.c[1793,1806] [2021-12-15 09:44:32,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:44:32,323 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:44:32,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32 WrapperNode [2021-12-15 09:44:32,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:44:32,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:44:32,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:44:32,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:44:32,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:32,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:32,774 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:44:32,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:44:32,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:44:32,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:44:32,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:44:32,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:32,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:32,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:32,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:33,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:33,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:33,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:33,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:44:33,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:44:33,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:44:33,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:44:33,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (1/1) ... [2021-12-15 09:44:33,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:44:33,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:33,262 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 09:44:33,268 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 09:44:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:44:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:44:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:44:33,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:44:33,347 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:44:33,348 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:44:36,821 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:44:36,832 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:44:36,832 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:44:36,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:44:36 BoogieIcfgContainer [2021-12-15 09:44:36,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:44:36,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:44:36,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:44:36,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:44:36,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:44:30" (1/3) ... [2021-12-15 09:44:36,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1107a8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:44:36, skipping insertion in model container [2021-12-15 09:44:36,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:44:32" (2/3) ... [2021-12-15 09:44:36,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1107a8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:44:36, skipping insertion in model container [2021-12-15 09:44:36,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:44:36" (3/3) ... [2021-12-15 09:44:36,840 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label35.c [2021-12-15 09:44:36,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:44:36,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:44:36,877 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:44:36,882 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 09:44:36,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:44:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 09:44:36,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:36,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:36,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1417350502, now seen corresponding path program 1 times [2021-12-15 09:44:36,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:36,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652393608] [2021-12-15 09:44:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:36,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:37,022 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 09:44:37,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652393608] [2021-12-15 09:44:37,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652393608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:37,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:37,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771077832] [2021-12-15 09:44:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:37,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:37,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:37,049 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 09:44:40,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:40,843 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-15 09:44:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-15 09:44:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:40,871 INFO L225 Difference]: With dead ends: 3160 [2021-12-15 09:44:40,871 INFO L226 Difference]: Without dead ends: 1983 [2021-12-15 09:44:40,878 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 09:44:40,882 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1093 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:40,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-15 09:44:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-15 09:44:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-15 09:44:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states 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 09:44:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-15 09:44:40,982 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 10 [2021-12-15 09:44:40,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:40,982 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-15 09:44:40,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 09:44:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-15 09:44:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 09:44:40,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:40,985 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:44:40,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:44:40,986 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2107929182, now seen corresponding path program 1 times [2021-12-15 09:44:40,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:40,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049830901] [2021-12-15 09:44:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:40,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:41,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:41,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049830901] [2021-12-15 09:44:41,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049830901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:41,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:41,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:41,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995192027] [2021-12-15 09:44:41,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:41,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:44:41,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:41,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:44:41,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:41,193 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 09:44:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:45,747 INFO L93 Difference]: Finished difference Result 6254 states and 11380 transitions. [2021-12-15 09:44:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-12-15 09:44:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:45,795 INFO L225 Difference]: With dead ends: 6254 [2021-12-15 09:44:45,795 INFO L226 Difference]: Without dead ends: 4326 [2021-12-15 09:44:45,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:44:45,803 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2618 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:45,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 1036 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 09:44:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-12-15 09:44:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4323. [2021-12-15 09:44:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4322 states have (on average 1.529615918556224) internal successors, (6611), 4322 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states 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 09:44:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 6611 transitions. [2021-12-15 09:44:45,909 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 6611 transitions. Word has length 75 [2021-12-15 09:44:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:45,911 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 6611 transitions. [2021-12-15 09:44:45,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 09:44:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 6611 transitions. [2021-12-15 09:44:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 09:44:45,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:45,918 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:44:45,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:44:45,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1429446939, now seen corresponding path program 1 times [2021-12-15 09:44:45,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:45,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379171846] [2021-12-15 09:44:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:45,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:46,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:46,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379171846] [2021-12-15 09:44:46,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379171846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:44:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706273998] [2021-12-15 09:44:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:46,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:44:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:46,161 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 09:44:46,167 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 09:44:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:44:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:44:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 09:44:46,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:44:46,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706273998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:46,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:44:46,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:44:46,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173621136] [2021-12-15 09:44:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:46,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:46,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:46,471 INFO L87 Difference]: Start difference. First operand 4323 states and 6611 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 09:44:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:49,395 INFO L93 Difference]: Finished difference Result 11043 states and 17778 transitions. [2021-12-15 09:44:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 135 [2021-12-15 09:44:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:49,441 INFO L225 Difference]: With dead ends: 11043 [2021-12-15 09:44:49,441 INFO L226 Difference]: Without dead ends: 7509 [2021-12-15 09:44:49,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:49,447 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 743 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:49,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1184 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-12-15 09:44:49,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 7489. [2021-12-15 09:44:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7489 states, 7488 states have (on average 1.3768696581196582) internal successors, (10310), 7488 states have internal predecessors, (10310), 0 states have call successors, (0), 0 states 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 09:44:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7489 states to 7489 states and 10310 transitions. [2021-12-15 09:44:49,531 INFO L78 Accepts]: Start accepts. Automaton has 7489 states and 10310 transitions. Word has length 135 [2021-12-15 09:44:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:49,532 INFO L470 AbstractCegarLoop]: Abstraction has 7489 states and 10310 transitions. [2021-12-15 09:44:49,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 09:44:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7489 states and 10310 transitions. [2021-12-15 09:44:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-15 09:44:49,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:49,534 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 09:44:49,565 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 09:44:49,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:44:49,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash 257980850, now seen corresponding path program 1 times [2021-12-15 09:44:49,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:49,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158022835] [2021-12-15 09:44:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:49,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:44:49,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158022835] [2021-12-15 09:44:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158022835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:49,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:49,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:49,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518298714] [2021-12-15 09:44:49,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:49,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:49,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:49,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:49,899 INFO L87 Difference]: Start difference. First operand 7489 states and 10310 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 09:44:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:52,765 INFO L93 Difference]: Finished difference Result 20512 states and 28844 transitions. [2021-12-15 09:44:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:52,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 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 177 [2021-12-15 09:44:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:52,807 INFO L225 Difference]: With dead ends: 20512 [2021-12-15 09:44:52,807 INFO L226 Difference]: Without dead ends: 13812 [2021-12-15 09:44:52,817 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 09:44:52,818 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 908 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2561 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 2561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:52,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 941 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 2561 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:44:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13812 states. [2021-12-15 09:44:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13812 to 13805. [2021-12-15 09:44:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13805 states, 13804 states have (on average 1.296073601854535) internal successors, (17891), 13804 states have internal predecessors, (17891), 0 states have call successors, (0), 0 states 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 09:44:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13805 states to 13805 states and 17891 transitions. [2021-12-15 09:44:53,005 INFO L78 Accepts]: Start accepts. Automaton has 13805 states and 17891 transitions. Word has length 177 [2021-12-15 09:44:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:53,006 INFO L470 AbstractCegarLoop]: Abstraction has 13805 states and 17891 transitions. [2021-12-15 09:44:53,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 09:44:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13805 states and 17891 transitions. [2021-12-15 09:44:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-15 09:44:53,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:53,010 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:44:53,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:44:53,011 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1218485360, now seen corresponding path program 1 times [2021-12-15 09:44:53,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907089102] [2021-12-15 09:44:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:53,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:53,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:53,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907089102] [2021-12-15 09:44:53,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907089102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:53,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:53,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:53,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688533816] [2021-12-15 09:44:53,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:53,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:44:53,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:44:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:53,184 INFO L87 Difference]: Start difference. First operand 13805 states and 17891 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 09:44:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:57,586 INFO L93 Difference]: Finished difference Result 38804 states and 51117 transitions. [2021-12-15 09:44:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2021-12-15 09:44:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:57,686 INFO L225 Difference]: With dead ends: 38804 [2021-12-15 09:44:57,691 INFO L226 Difference]: Without dead ends: 25788 [2021-12-15 09:44:57,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:57,709 INFO L933 BasicCegarLoop]: 1077 mSDtfsCounter, 1642 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 5860 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 5860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:57,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1642 Valid, 1248 Invalid, 6556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 5860 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 09:44:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2021-12-15 09:44:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 25646. [2021-12-15 09:44:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25646 states, 25645 states have (on average 1.2610645349970755) internal successors, (32340), 25645 states have internal predecessors, (32340), 0 states have call successors, (0), 0 states 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 09:44:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25646 states to 25646 states and 32340 transitions. [2021-12-15 09:44:58,081 INFO L78 Accepts]: Start accepts. Automaton has 25646 states and 32340 transitions. Word has length 207 [2021-12-15 09:44:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:58,081 INFO L470 AbstractCegarLoop]: Abstraction has 25646 states and 32340 transitions. [2021-12-15 09:44:58,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 09:44:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 25646 states and 32340 transitions. [2021-12-15 09:44:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-15 09:44:58,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:58,084 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 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 09:44:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:44:58,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1316552065, now seen corresponding path program 1 times [2021-12-15 09:44:58,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839729583] [2021-12-15 09:44:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:58,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:58,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839729583] [2021-12-15 09:44:58,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839729583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:58,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:58,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:58,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397650227] [2021-12-15 09:44:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:58,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:58,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:58,191 INFO L87 Difference]: Start difference. First operand 25646 states and 32340 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 09:45:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:01,111 INFO L93 Difference]: Finished difference Result 62349 states and 80741 transitions. [2021-12-15 09:45:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:01,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2021-12-15 09:45:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:01,178 INFO L225 Difference]: With dead ends: 62349 [2021-12-15 09:45:01,178 INFO L226 Difference]: Without dead ends: 37492 [2021-12-15 09:45:01,205 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 09:45:01,208 INFO L933 BasicCegarLoop]: 1850 mSDtfsCounter, 756 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:01,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1994 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:45:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37492 states. [2021-12-15 09:45:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37492 to 37456. [2021-12-15 09:45:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37456 states, 37455 states have (on average 1.2191963689761047) internal successors, (45665), 37455 states have internal predecessors, (45665), 0 states have call successors, (0), 0 states 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 09:45:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37456 states to 37456 states and 45665 transitions. [2021-12-15 09:45:01,694 INFO L78 Accepts]: Start accepts. Automaton has 37456 states and 45665 transitions. Word has length 222 [2021-12-15 09:45:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:01,695 INFO L470 AbstractCegarLoop]: Abstraction has 37456 states and 45665 transitions. [2021-12-15 09:45:01,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 09:45:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 37456 states and 45665 transitions. [2021-12-15 09:45:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-15 09:45:01,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:01,698 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:01,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:45:01,698 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2104272133, now seen corresponding path program 1 times [2021-12-15 09:45:01,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:01,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631114285] [2021-12-15 09:45:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:01,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:01,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631114285] [2021-12-15 09:45:01,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631114285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:01,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:01,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:01,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907780418] [2021-12-15 09:45:01,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:01,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:01,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:01,783 INFO L87 Difference]: Start difference. First operand 37456 states and 45665 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 09:45:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:04,374 INFO L93 Difference]: Finished difference Result 74105 states and 90519 transitions. [2021-12-15 09:45:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:04,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-12-15 09:45:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:04,478 INFO L225 Difference]: With dead ends: 74105 [2021-12-15 09:45:04,487 INFO L226 Difference]: Without dead ends: 37438 [2021-12-15 09:45:04,531 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 09:45:04,552 INFO L933 BasicCegarLoop]: 1495 mSDtfsCounter, 1036 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:04,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1639 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:45:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37438 states. [2021-12-15 09:45:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37438 to 37432. [2021-12-15 09:45:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 1.1478186529881649) internal successors, (42964), 37431 states have internal predecessors, (42964), 0 states have call successors, (0), 0 states 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 09:45:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 42964 transitions. [2021-12-15 09:45:05,352 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 42964 transitions. Word has length 224 [2021-12-15 09:45:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:05,352 INFO L470 AbstractCegarLoop]: Abstraction has 37432 states and 42964 transitions. [2021-12-15 09:45:05,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 09:45:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 42964 transitions. [2021-12-15 09:45:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-15 09:45:05,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:05,355 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-15 09:45:05,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:45:05,355 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1288125869, now seen corresponding path program 1 times [2021-12-15 09:45:05,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:05,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480934109] [2021-12-15 09:45:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:05,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 09:45:05,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480934109] [2021-12-15 09:45:05,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480934109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:05,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:05,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:05,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406763327] [2021-12-15 09:45:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:05,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:05,428 INFO L87 Difference]: Start difference. First operand 37432 states and 42964 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 09:45:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:08,672 INFO L93 Difference]: Finished difference Result 103975 states and 119910 transitions. [2021-12-15 09:45:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 256 [2021-12-15 09:45:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:08,824 INFO L225 Difference]: With dead ends: 103975 [2021-12-15 09:45:08,824 INFO L226 Difference]: Without dead ends: 64966 [2021-12-15 09:45:08,849 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 09:45:08,850 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 844 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 863 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 863 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:08,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1048 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [863 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:45:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64966 states. [2021-12-15 09:45:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64966 to 60236. [2021-12-15 09:45:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60236 states, 60235 states have (on average 1.1142857142857143) internal successors, (67119), 60235 states have internal predecessors, (67119), 0 states have call successors, (0), 0 states 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 09:45:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60236 states to 60236 states and 67119 transitions. [2021-12-15 09:45:09,461 INFO L78 Accepts]: Start accepts. Automaton has 60236 states and 67119 transitions. Word has length 256 [2021-12-15 09:45:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:09,461 INFO L470 AbstractCegarLoop]: Abstraction has 60236 states and 67119 transitions. [2021-12-15 09:45:09,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 09:45:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 60236 states and 67119 transitions. [2021-12-15 09:45:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-15 09:45:09,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:09,465 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:09,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:45:09,465 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:09,466 INFO L85 PathProgramCache]: Analyzing trace with hash -949171357, now seen corresponding path program 1 times [2021-12-15 09:45:09,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:09,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639809267] [2021-12-15 09:45:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:09,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-15 09:45:09,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:09,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639809267] [2021-12-15 09:45:09,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639809267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:09,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:09,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:09,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322477469] [2021-12-15 09:45:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:09,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:09,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:09,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:09,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:09,555 INFO L87 Difference]: Start difference. First operand 60236 states and 67119 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 09:45:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:12,575 INFO L93 Difference]: Finished difference Result 129903 states and 146001 transitions. [2021-12-15 09:45:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 325 [2021-12-15 09:45:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:12,657 INFO L225 Difference]: With dead ends: 129903 [2021-12-15 09:45:12,658 INFO L226 Difference]: Without dead ends: 70456 [2021-12-15 09:45:12,686 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 09:45:12,687 INFO L933 BasicCegarLoop]: 1433 mSDtfsCounter, 1145 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:12,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 1516 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:45:12,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70456 states. [2021-12-15 09:45:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70456 to 70455. [2021-12-15 09:45:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70455 states, 70454 states have (on average 1.0986601186589833) internal successors, (77405), 70454 states have internal predecessors, (77405), 0 states have call successors, (0), 0 states 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 09:45:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70455 states to 70455 states and 77405 transitions. [2021-12-15 09:45:13,515 INFO L78 Accepts]: Start accepts. Automaton has 70455 states and 77405 transitions. Word has length 325 [2021-12-15 09:45:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:13,516 INFO L470 AbstractCegarLoop]: Abstraction has 70455 states and 77405 transitions. [2021-12-15 09:45:13,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 09:45:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 70455 states and 77405 transitions. [2021-12-15 09:45:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-15 09:45:13,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:13,521 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-15 09:45:13,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:45:13,522 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash 240805553, now seen corresponding path program 1 times [2021-12-15 09:45:13,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990191346] [2021-12-15 09:45:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:13,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 09:45:13,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:13,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990191346] [2021-12-15 09:45:13,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990191346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:13,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:13,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:13,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274798139] [2021-12-15 09:45:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:13,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:13,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:13,596 INFO L87 Difference]: Start difference. First operand 70455 states and 77405 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 09:45:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:19,220 INFO L93 Difference]: Finished difference Result 175710 states and 193152 transitions. [2021-12-15 09:45:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:45:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 358 [2021-12-15 09:45:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:19,348 INFO L225 Difference]: With dead ends: 175710 [2021-12-15 09:45:19,348 INFO L226 Difference]: Without dead ends: 106044 [2021-12-15 09:45:19,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:19,390 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1677 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 6508 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 7458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 6508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:19,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1677 Valid, 834 Invalid, 7458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 6508 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 09:45:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106044 states. [2021-12-15 09:45:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106044 to 83845. [2021-12-15 09:45:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83845 states, 83844 states have (on average 1.09070416487763) internal successors, (91449), 83844 states have internal predecessors, (91449), 0 states have call successors, (0), 0 states 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 09:45:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83845 states to 83845 states and 91449 transitions. [2021-12-15 09:45:20,515 INFO L78 Accepts]: Start accepts. Automaton has 83845 states and 91449 transitions. Word has length 358 [2021-12-15 09:45:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:20,516 INFO L470 AbstractCegarLoop]: Abstraction has 83845 states and 91449 transitions. [2021-12-15 09:45:20,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 09:45:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 83845 states and 91449 transitions. [2021-12-15 09:45:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-15 09:45:20,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:20,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:45:20,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:45:20,521 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1615939699, now seen corresponding path program 1 times [2021-12-15 09:45:20,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:20,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082523991] [2021-12-15 09:45:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:20,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-15 09:45:20,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:20,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082523991] [2021-12-15 09:45:20,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082523991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:20,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:20,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:20,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172470532] [2021-12-15 09:45:20,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:20,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:20,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:20,627 INFO L87 Difference]: Start difference. First operand 83845 states and 91449 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 09:45:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:24,154 INFO L93 Difference]: Finished difference Result 188151 states and 206077 transitions. [2021-12-15 09:45:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 371 [2021-12-15 09:45:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:24,280 INFO L225 Difference]: With dead ends: 188151 [2021-12-15 09:45:24,280 INFO L226 Difference]: Without dead ends: 105095 [2021-12-15 09:45:24,326 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 09:45:24,327 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 802 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 891 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:24,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 855 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [891 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:45:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105095 states. [2021-12-15 09:45:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105095 to 103509. [2021-12-15 09:45:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103509 states, 103508 states have (on average 1.084679445067048) internal successors, (112273), 103508 states have internal predecessors, (112273), 0 states have call successors, (0), 0 states 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 09:45:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103509 states to 103509 states and 112273 transitions. [2021-12-15 09:45:25,663 INFO L78 Accepts]: Start accepts. Automaton has 103509 states and 112273 transitions. Word has length 371 [2021-12-15 09:45:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:25,663 INFO L470 AbstractCegarLoop]: Abstraction has 103509 states and 112273 transitions. [2021-12-15 09:45:25,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 09:45:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 103509 states and 112273 transitions. [2021-12-15 09:45:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-12-15 09:45:25,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:25,673 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:25,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:45:25,674 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash -459150642, now seen corresponding path program 1 times [2021-12-15 09:45:25,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664879486] [2021-12-15 09:45:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:25,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-12-15 09:45:25,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664879486] [2021-12-15 09:45:25,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664879486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:25,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:25,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:25,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757611724] [2021-12-15 09:45:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:25,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:25,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:25,794 INFO L87 Difference]: Start difference. First operand 103509 states and 112273 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:29,278 INFO L93 Difference]: Finished difference Result 224329 states and 244409 transitions. [2021-12-15 09:45:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-12-15 09:45:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:29,428 INFO L225 Difference]: With dead ends: 224329 [2021-12-15 09:45:29,428 INFO L226 Difference]: Without dead ends: 120035 [2021-12-15 09:45:29,483 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 09:45:29,484 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 849 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 3150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:29,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1829 Invalid, 3150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:45:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120035 states. [2021-12-15 09:45:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120035 to 120022. [2021-12-15 09:45:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120022 states, 120021 states have (on average 1.0723206772148208) internal successors, (128701), 120021 states have internal predecessors, (128701), 0 states have call successors, (0), 0 states 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 09:45:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120022 states to 120022 states and 128701 transitions. [2021-12-15 09:45:30,902 INFO L78 Accepts]: Start accepts. Automaton has 120022 states and 128701 transitions. Word has length 477 [2021-12-15 09:45:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:30,902 INFO L470 AbstractCegarLoop]: Abstraction has 120022 states and 128701 transitions. [2021-12-15 09:45:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 120022 states and 128701 transitions. [2021-12-15 09:45:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-12-15 09:45:30,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:30,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:30,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:45:30,927 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1561614142, now seen corresponding path program 1 times [2021-12-15 09:45:30,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:30,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077781207] [2021-12-15 09:45:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:30,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 256 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 09:45:31,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077781207] [2021-12-15 09:45:31,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077781207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:45:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479581372] [2021-12-15 09:45:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:31,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:45:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:31,166 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 09:45:31,167 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 09:45:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:45:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:45:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 09:45:32,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:45:32,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479581372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:32,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:45:32,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:45:32,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401301868] [2021-12-15 09:45:32,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:32,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:32,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:32,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:32,680 INFO L87 Difference]: Start difference. First operand 120022 states and 128701 transitions. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 2 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)