./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label26.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/Problem12_label26.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 3e2e47b78067195f514cd980cc36561e3679a03106d39ad74c0665f1ff81079a --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:39:15,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:39:15,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:39:15,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:39:15,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:39:15,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:39:15,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:39:15,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:39:15,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:39:15,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:39:15,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:39:15,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:39:15,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:39:15,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:39:15,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:39:15,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:39:15,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:39:15,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:39:15,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:39:15,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:39:15,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:39:15,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:39:15,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:39:15,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:39:15,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:39:15,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:39:15,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:39:15,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:39:15,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:39:15,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:39:15,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:39:15,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:39:15,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:39:15,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:39:15,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:39:15,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:39:15,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:39:15,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:39:15,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:39:15,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:39:15,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:39:15,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:39:15,656 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:39:15,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:39:15,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:39:15,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:39:15,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:39:15,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:39:15,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:39:15,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:39:15,658 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:39:15,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:39:15,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:39:15,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:39:15,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:39:15,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:39:15,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:39:15,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:39:15,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:39:15,660 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:39:15,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:39:15,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:39:15,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:39:15,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:39:15,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:39:15,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:39:15,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:39:15,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:39:15,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:39:15,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:39:15,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:39:15,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:39:15,663 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:39:15,663 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:39:15,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:39:15,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:39:15,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2e47b78067195f514cd980cc36561e3679a03106d39ad74c0665f1ff81079a [2021-12-15 09:39:15,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:39:15,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:39:15,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:39:15,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:39:15,866 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:39:15,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label26.c [2021-12-15 09:39:15,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd1d9523/2ca89a5e07fa4bbc82faf712e39147a2/FLAGc979633ff [2021-12-15 09:39:16,474 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:39:16,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label26.c [2021-12-15 09:39:16,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd1d9523/2ca89a5e07fa4bbc82faf712e39147a2/FLAGc979633ff [2021-12-15 09:39:16,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd1d9523/2ca89a5e07fa4bbc82faf712e39147a2 [2021-12-15 09:39:16,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:39:16,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:39:16,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:39:16,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:39:16,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:39:16,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:39:16" (1/1) ... [2021-12-15 09:39:16,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64aa0023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:16, skipping insertion in model container [2021-12-15 09:39:16,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:39:16" (1/1) ... [2021-12-15 09:39:16,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:39:17,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:39:17,241 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/Problem12_label26.c[5703,5716] [2021-12-15 09:39:17,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:39:17,904 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:39:17,929 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/Problem12_label26.c[5703,5716] [2021-12-15 09:39:18,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:39:18,293 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:39:18,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18 WrapperNode [2021-12-15 09:39:18,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:39:18,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:39:18,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:39:18,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:39:18,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,576 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:39:18,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:39:18,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:39:18,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:39:18,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:39:18,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:18,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:19,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:39:19,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:39:19,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:39:19,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:39:19,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (1/1) ... [2021-12-15 09:39:19,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:39:19,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:39:19,033 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 09:39:19,065 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 09:39:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:39:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:39:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:39:19,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:39:19,147 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:39:19,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:39:21,624 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:39:21,642 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:39:21,642 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:39:21,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:39:21 BoogieIcfgContainer [2021-12-15 09:39:21,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:39:21,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:39:21,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:39:21,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:39:21,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:39:16" (1/3) ... [2021-12-15 09:39:21,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38007a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:39:21, skipping insertion in model container [2021-12-15 09:39:21,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:39:18" (2/3) ... [2021-12-15 09:39:21,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38007a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:39:21, skipping insertion in model container [2021-12-15 09:39:21,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:39:21" (3/3) ... [2021-12-15 09:39:21,654 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label26.c [2021-12-15 09:39:21,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:39:21,659 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:39:21,704 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:39:21,709 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 09:39:21,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:39:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states 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 09:39:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 09:39:21,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:21,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:21,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-12-15 09:39:21,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411396977] [2021-12-15 09:39:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:21,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:21,999 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 09:39:22,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:22,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411396977] [2021-12-15 09:39:22,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411396977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:22,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:22,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:22,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379569533] [2021-12-15 09:39:22,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:22,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:39:22,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:39:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:39:22,032 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 09:39:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:27,387 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2021-12-15 09:39:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:39:27,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-15 09:39:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:27,406 INFO L225 Difference]: With dead ends: 3142 [2021-12-15 09:39:27,406 INFO L226 Difference]: Without dead ends: 2257 [2021-12-15 09:39:27,412 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 09:39:27,414 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 2219 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5678 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 6898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 5678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:27,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2219 Valid, 783 Invalid, 6898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1220 Valid, 5678 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-15 09:39:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-15 09:39:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-12-15 09:39:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5802304964539007) internal successors, (3565), 2256 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states 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 09:39:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3565 transitions. [2021-12-15 09:39:27,547 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3565 transitions. Word has length 45 [2021-12-15 09:39:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:27,549 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3565 transitions. [2021-12-15 09:39:27,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 09:39:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3565 transitions. [2021-12-15 09:39:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 09:39:27,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:27,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:27,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:39:27,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash 937002619, now seen corresponding path program 1 times [2021-12-15 09:39:27,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:27,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989094512] [2021-12-15 09:39:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:27,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:27,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:27,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989094512] [2021-12-15 09:39:27,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989094512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:27,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:27,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:27,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190371595] [2021-12-15 09:39:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:39:27,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:39:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:39:27,722 INFO L87 Difference]: Start difference. First operand 2257 states and 3565 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:31,148 INFO L93 Difference]: Finished difference Result 5300 states and 9213 transitions. [2021-12-15 09:39:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:39:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-15 09:39:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:31,161 INFO L225 Difference]: With dead ends: 5300 [2021-12-15 09:39:31,161 INFO L226 Difference]: Without dead ends: 3759 [2021-12-15 09:39:31,164 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 09:39:31,165 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:31,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-15 09:39:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-15 09:39:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-12-15 09:39:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3685470995210218) internal successors, (5143), 3758 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states 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 09:39:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5143 transitions. [2021-12-15 09:39:31,220 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5143 transitions. Word has length 116 [2021-12-15 09:39:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:31,220 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5143 transitions. [2021-12-15 09:39:31,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5143 transitions. [2021-12-15 09:39:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-15 09:39:31,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:31,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:31,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:39:31,223 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1563888852, now seen corresponding path program 1 times [2021-12-15 09:39:31,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:31,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642514548] [2021-12-15 09:39:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:31,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:39:31,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642514548] [2021-12-15 09:39:31,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642514548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:39:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44827472] [2021-12-15 09:39:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:31,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:39:31,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:39:31,368 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 09:39:31,384 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 09:39:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:31,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:39:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:39:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 09:39:31,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:39:31,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44827472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:31,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:39:31,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:39:31,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219089193] [2021-12-15 09:39:31,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:31,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:31,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:31,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:39:31,835 INFO L87 Difference]: Start difference. First operand 3759 states and 5143 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 09:39:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:34,138 INFO L93 Difference]: Finished difference Result 9018 states and 13078 transitions. [2021-12-15 09:39:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 190 [2021-12-15 09:39:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:34,167 INFO L225 Difference]: With dead ends: 9018 [2021-12-15 09:39:34,168 INFO L226 Difference]: Without dead ends: 6012 [2021-12-15 09:39:34,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:39:34,172 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 720 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:34,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 104 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:39:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-12-15 09:39:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 5261. [2021-12-15 09:39:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.4636882129277566) internal successors, (7699), 5260 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states 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 09:39:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7699 transitions. [2021-12-15 09:39:34,244 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7699 transitions. Word has length 190 [2021-12-15 09:39:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:34,245 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7699 transitions. [2021-12-15 09:39:34,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 09:39:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7699 transitions. [2021-12-15 09:39:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-15 09:39:34,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:34,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:34,268 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 09:39:34,463 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 09:39:34,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1321864166, now seen corresponding path program 1 times [2021-12-15 09:39:34,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219513532] [2021-12-15 09:39:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:34,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:39:34,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:34,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219513532] [2021-12-15 09:39:34,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219513532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:34,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:34,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:34,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729257074] [2021-12-15 09:39:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:34,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:39:34,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:34,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:39:34,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:39:34,623 INFO L87 Difference]: Start difference. First operand 5261 states and 7699 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 09:39:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:37,509 INFO L93 Difference]: Finished difference Result 12812 states and 19959 transitions. [2021-12-15 09:39:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:39:37,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 257 [2021-12-15 09:39:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:37,530 INFO L225 Difference]: With dead ends: 12812 [2021-12-15 09:39:37,530 INFO L226 Difference]: Without dead ends: 8267 [2021-12-15 09:39:37,534 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 09:39:37,535 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 851 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:37,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 324 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:39:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-12-15 09:39:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 7514. [2021-12-15 09:39:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.4243311593238386) internal successors, (10701), 7513 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states 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 09:39:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 10701 transitions. [2021-12-15 09:39:37,634 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 10701 transitions. Word has length 257 [2021-12-15 09:39:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:37,635 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 10701 transitions. [2021-12-15 09:39:37,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 09:39:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 10701 transitions. [2021-12-15 09:39:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-15 09:39:37,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:37,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:39:37,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:39:37,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1355808625, now seen corresponding path program 1 times [2021-12-15 09:39:37,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:37,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792732080] [2021-12-15 09:39:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:37,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 09:39:37,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:37,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792732080] [2021-12-15 09:39:37,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792732080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:37,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:37,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:39:37,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028297432] [2021-12-15 09:39:37,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:37,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:37,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:37,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:37,730 INFO L87 Difference]: Start difference. First operand 7514 states and 10701 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 09:39:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:39,891 INFO L93 Difference]: Finished difference Result 18030 states and 26024 transitions. [2021-12-15 09:39:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 279 [2021-12-15 09:39:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:39,924 INFO L225 Difference]: With dead ends: 18030 [2021-12-15 09:39:39,925 INFO L226 Difference]: Without dead ends: 11269 [2021-12-15 09:39:39,932 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 09:39:39,933 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 694 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:39,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 422 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:39:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2021-12-15 09:39:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 11269. [2021-12-15 09:39:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.2212460063897763) internal successors, (13761), 11268 states have internal predecessors, (13761), 0 states have call successors, (0), 0 states 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 09:39:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13761 transitions. [2021-12-15 09:39:40,118 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13761 transitions. Word has length 279 [2021-12-15 09:39:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:40,119 INFO L470 AbstractCegarLoop]: Abstraction has 11269 states and 13761 transitions. [2021-12-15 09:39:40,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states 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 09:39:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13761 transitions. [2021-12-15 09:39:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-15 09:39:40,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:40,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:40,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:39:40,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:40,125 INFO L85 PathProgramCache]: Analyzing trace with hash -499888435, now seen corresponding path program 1 times [2021-12-15 09:39:40,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:40,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863161096] [2021-12-15 09:39:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:40,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:39:40,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:40,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863161096] [2021-12-15 09:39:40,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863161096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:40,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:40,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:40,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132534138] [2021-12-15 09:39:40,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:40,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:40,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:40,268 INFO L87 Difference]: Start difference. First operand 11269 states and 13761 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:42,590 INFO L93 Difference]: Finished difference Result 26291 states and 32977 transitions. [2021-12-15 09:39:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2021-12-15 09:39:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:42,616 INFO L225 Difference]: With dead ends: 26291 [2021-12-15 09:39:42,616 INFO L226 Difference]: Without dead ends: 15775 [2021-12-15 09:39:42,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 09:39:42,628 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 840 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 840 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:42,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [840 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:39:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15775 states. [2021-12-15 09:39:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15775 to 15775. [2021-12-15 09:39:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2434385697984025) internal successors, (19614), 15774 states have internal predecessors, (19614), 0 states have call successors, (0), 0 states 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 09:39:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19614 transitions. [2021-12-15 09:39:42,882 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19614 transitions. Word has length 358 [2021-12-15 09:39:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:42,883 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19614 transitions. [2021-12-15 09:39:42,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:39:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19614 transitions. [2021-12-15 09:39:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-15 09:39:42,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:42,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:42,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:39:42,889 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1774311319, now seen corresponding path program 1 times [2021-12-15 09:39:42,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:42,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570443848] [2021-12-15 09:39:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:42,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 128 proven. 108 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-15 09:39:43,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570443848] [2021-12-15 09:39:43,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570443848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:39:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352674212] [2021-12-15 09:39:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:43,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:39:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:39:43,029 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 09:39:43,067 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 09:39:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:39:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:39:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:39:43,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:39:43,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352674212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:43,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:39:43,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:39:43,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317570490] [2021-12-15 09:39:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:43,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:43,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:39:43,652 INFO L87 Difference]: Start difference. First operand 15775 states and 19614 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 09:39:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:45,923 INFO L93 Difference]: Finished difference Result 34552 states and 43511 transitions. [2021-12-15 09:39:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 362 [2021-12-15 09:39:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:45,954 INFO L225 Difference]: With dead ends: 34552 [2021-12-15 09:39:45,954 INFO L226 Difference]: Without dead ends: 19530 [2021-12-15 09:39:45,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:39:45,969 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 761 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:45,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 235 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:39:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2021-12-15 09:39:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 19530. [2021-12-15 09:39:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19530 states, 19529 states have (on average 1.2406165190229914) internal successors, (24228), 19529 states have internal predecessors, (24228), 0 states have call successors, (0), 0 states 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 09:39:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19530 states to 19530 states and 24228 transitions. [2021-12-15 09:39:46,257 INFO L78 Accepts]: Start accepts. Automaton has 19530 states and 24228 transitions. Word has length 362 [2021-12-15 09:39:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:46,257 INFO L470 AbstractCegarLoop]: Abstraction has 19530 states and 24228 transitions. [2021-12-15 09:39:46,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 09:39:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 19530 states and 24228 transitions. [2021-12-15 09:39:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-15 09:39:46,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:46,261 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:39:46,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:39:46,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-15 09:39:46,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:46,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1964185345, now seen corresponding path program 1 times [2021-12-15 09:39:46,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:46,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217535617] [2021-12-15 09:39:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:46,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-15 09:39:46,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217535617] [2021-12-15 09:39:46,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217535617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:46,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:46,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:46,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090952522] [2021-12-15 09:39:46,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:46,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:46,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:46,565 INFO L87 Difference]: Start difference. First operand 19530 states and 24228 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 09:39:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:49,077 INFO L93 Difference]: Finished difference Result 54829 states and 68728 transitions. [2021-12-15 09:39:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:49,078 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 373 [2021-12-15 09:39:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:49,124 INFO L225 Difference]: With dead ends: 54829 [2021-12-15 09:39:49,125 INFO L226 Difference]: Without dead ends: 36052 [2021-12-15 09:39:49,146 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 09:39:49,147 INFO L933 BasicCegarLoop]: 1352 mSDtfsCounter, 726 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:49,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 1360 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:39:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-12-15 09:39:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 34550. [2021-12-15 09:39:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.1807288199369013) internal successors, (40793), 34549 states have internal predecessors, (40793), 0 states have call successors, (0), 0 states 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 09:39:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 40793 transitions. [2021-12-15 09:39:49,555 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 40793 transitions. Word has length 373 [2021-12-15 09:39:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:49,556 INFO L470 AbstractCegarLoop]: Abstraction has 34550 states and 40793 transitions. [2021-12-15 09:39:49,556 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 09:39:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 40793 transitions. [2021-12-15 09:39:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-15 09:39:49,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:49,565 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:49,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:39:49,565 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash -127783978, now seen corresponding path program 1 times [2021-12-15 09:39:49,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:49,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841393839] [2021-12-15 09:39:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:49,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-15 09:39:49,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:49,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841393839] [2021-12-15 09:39:49,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841393839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:49,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:49,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:49,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799919889] [2021-12-15 09:39:49,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:49,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:49,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:49,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:49,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:49,661 INFO L87 Difference]: Start difference. First operand 34550 states and 40793 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 09:39:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:52,596 INFO L93 Difference]: Finished difference Result 84869 states and 100273 transitions. [2021-12-15 09:39:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 462 [2021-12-15 09:39:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:52,664 INFO L225 Difference]: With dead ends: 84869 [2021-12-15 09:39:52,664 INFO L226 Difference]: Without dead ends: 51072 [2021-12-15 09:39:52,677 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 09:39:52,678 INFO L933 BasicCegarLoop]: 1352 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:52,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1360 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 2699 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:39:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51072 states. [2021-12-15 09:39:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51072 to 49570. [2021-12-15 09:39:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49570 states, 49569 states have (on average 1.170993968004196) internal successors, (58045), 49569 states have internal predecessors, (58045), 0 states have call successors, (0), 0 states 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 09:39:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49570 states to 49570 states and 58045 transitions. [2021-12-15 09:39:53,160 INFO L78 Accepts]: Start accepts. Automaton has 49570 states and 58045 transitions. Word has length 462 [2021-12-15 09:39:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:53,160 INFO L470 AbstractCegarLoop]: Abstraction has 49570 states and 58045 transitions. [2021-12-15 09:39:53,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 09:39:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 49570 states and 58045 transitions. [2021-12-15 09:39:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-12-15 09:39:53,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:53,170 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:53,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:39:53,170 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash 301269280, now seen corresponding path program 1 times [2021-12-15 09:39:53,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:53,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997756266] [2021-12-15 09:39:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:53,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:39:53,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997756266] [2021-12-15 09:39:53,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997756266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:53,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:39:53,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:39:53,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495853894] [2021-12-15 09:39:53,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:53,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:53,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:39:53,427 INFO L87 Difference]: Start difference. First operand 49570 states and 58045 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 09:39:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:39:56,130 INFO L93 Difference]: Finished difference Result 122419 states and 145479 transitions. [2021-12-15 09:39:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:39:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 466 [2021-12-15 09:39:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:39:56,211 INFO L225 Difference]: With dead ends: 122419 [2021-12-15 09:39:56,211 INFO L226 Difference]: Without dead ends: 69847 [2021-12-15 09:39:56,249 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 09:39:56,250 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 711 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:39:56,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 1266 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:39:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69847 states. [2021-12-15 09:39:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69847 to 62337. [2021-12-15 09:39:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62337 states, 62336 states have (on average 1.1526244866529773) internal successors, (71850), 62336 states have internal predecessors, (71850), 0 states have call successors, (0), 0 states 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 09:39:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 71850 transitions. [2021-12-15 09:39:57,032 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 71850 transitions. Word has length 466 [2021-12-15 09:39:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:39:57,034 INFO L470 AbstractCegarLoop]: Abstraction has 62337 states and 71850 transitions. [2021-12-15 09:39:57,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 09:39:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 71850 transitions. [2021-12-15 09:39:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-12-15 09:39:57,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:39:57,052 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:39:57,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:39:57,053 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:39:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:39:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2086807197, now seen corresponding path program 1 times [2021-12-15 09:39:57,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:39:57,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004502661] [2021-12-15 09:39:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:57,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:39:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 414 proven. 108 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-15 09:39:57,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:39:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004502661] [2021-12-15 09:39:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004502661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:39:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969566081] [2021-12-15 09:39:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:39:57,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:39:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:39:57,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:39:57,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:39:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:39:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:39:57,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:39:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-15 09:39:57,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:39:57,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969566081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:39:57,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:39:57,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:39:57,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568441855] [2021-12-15 09:39:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:39:57,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:39:57,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:39:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:39:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:39:57,994 INFO L87 Difference]: Start difference. First operand 62337 states and 71850 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 09:40:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:00,659 INFO L93 Difference]: Finished difference Result 123921 states and 142942 transitions. [2021-12-15 09:40:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 532 [2021-12-15 09:40:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:00,736 INFO L225 Difference]: With dead ends: 123921 [2021-12-15 09:40:00,736 INFO L226 Difference]: Without dead ends: 62337 [2021-12-15 09:40:00,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:40:00,774 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 685 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:00,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1302 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:40:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2021-12-15 09:40:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 60084. [2021-12-15 09:40:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60084 states, 60083 states have (on average 1.1125110264134614) internal successors, (66843), 60083 states have internal predecessors, (66843), 0 states have call successors, (0), 0 states 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 09:40:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60084 states to 60084 states and 66843 transitions. [2021-12-15 09:40:01,495 INFO L78 Accepts]: Start accepts. Automaton has 60084 states and 66843 transitions. Word has length 532 [2021-12-15 09:40:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:01,495 INFO L470 AbstractCegarLoop]: Abstraction has 60084 states and 66843 transitions. [2021-12-15 09:40:01,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 09:40:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 60084 states and 66843 transitions. [2021-12-15 09:40:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-12-15 09:40:01,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:01,699 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:01,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:40:01,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:40:01,900 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1428071453, now seen corresponding path program 1 times [2021-12-15 09:40:01,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:01,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9743789] [2021-12-15 09:40:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:01,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 128 proven. 14 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-12-15 09:40:02,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9743789] [2021-12-15 09:40:02,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9743789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:40:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127447663] [2021-12-15 09:40:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:02,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:40:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:40:02,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:40:02,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:40:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:40:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:40:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-15 09:40:02,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:40:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127447663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:02,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:40:02,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:40:02,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012860632] [2021-12-15 09:40:02,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:02,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:02,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:40:02,962 INFO L87 Difference]: Start difference. First operand 60084 states and 66843 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 09:40:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:05,487 INFO L93 Difference]: Finished difference Result 119415 states and 132928 transitions. [2021-12-15 09:40:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 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 546 [2021-12-15 09:40:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:05,563 INFO L225 Difference]: With dead ends: 119415 [2021-12-15 09:40:05,563 INFO L226 Difference]: Without dead ends: 60084 [2021-12-15 09:40:05,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:40:05,599 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 534 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:05,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 403 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:40:05,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-12-15 09:40:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 58582. [2021-12-15 09:40:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58582 states, 58581 states have (on average 1.0728393165019374) internal successors, (62848), 58581 states have internal predecessors, (62848), 0 states have call successors, (0), 0 states 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 09:40:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58582 states to 58582 states and 62848 transitions. [2021-12-15 09:40:06,277 INFO L78 Accepts]: Start accepts. Automaton has 58582 states and 62848 transitions. Word has length 546 [2021-12-15 09:40:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:06,278 INFO L470 AbstractCegarLoop]: Abstraction has 58582 states and 62848 transitions. [2021-12-15 09:40:06,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 09:40:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 58582 states and 62848 transitions. [2021-12-15 09:40:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2021-12-15 09:40:06,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:06,297 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:06,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:40:06,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:40:06,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1246390379, now seen corresponding path program 1 times [2021-12-15 09:40:06,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:06,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903995340] [2021-12-15 09:40:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:06,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-15 09:40:06,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:06,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903995340] [2021-12-15 09:40:06,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903995340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:06,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:06,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:06,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519756251] [2021-12-15 09:40:06,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:06,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:06,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:06,953 INFO L87 Difference]: Start difference. First operand 58582 states and 62848 transitions. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 09:40:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:11,500 INFO L93 Difference]: Finished difference Result 176491 states and 190477 transitions. [2021-12-15 09:40:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:40:11,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 613 [2021-12-15 09:40:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:11,628 INFO L225 Difference]: With dead ends: 176491 [2021-12-15 09:40:11,629 INFO L226 Difference]: Without dead ends: 118662 [2021-12-15 09:40:11,642 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 09:40:11,643 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1611 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4981 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 4981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:11,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 57 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 4981 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-15 09:40:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118662 states. [2021-12-15 09:40:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118662 to 117911. [2021-12-15 09:40:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117911 states, 117910 states have (on average 1.076142820795522) internal successors, (126888), 117910 states have internal predecessors, (126888), 0 states have call successors, (0), 0 states 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 09:40:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117911 states to 117911 states and 126888 transitions. [2021-12-15 09:40:12,825 INFO L78 Accepts]: Start accepts. Automaton has 117911 states and 126888 transitions. Word has length 613 [2021-12-15 09:40:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:12,825 INFO L470 AbstractCegarLoop]: Abstraction has 117911 states and 126888 transitions. [2021-12-15 09:40:12,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 09:40:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 117911 states and 126888 transitions. [2021-12-15 09:40:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2021-12-15 09:40:12,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:12,847 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:12,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:40:12,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:12,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash 669514663, now seen corresponding path program 1 times [2021-12-15 09:40:12,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:12,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759084885] [2021-12-15 09:40:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:12,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 09:40:13,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:13,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759084885] [2021-12-15 09:40:13,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759084885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:13,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:13,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:13,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090002385] [2021-12-15 09:40:13,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:13,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:13,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:13,192 INFO L87 Difference]: Start difference. First operand 117911 states and 126888 transitions. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)