./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label47.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_label47.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 6b006d8e4231a58992706b525e43e67dd3e0df162d0a378f0ac12d9a99bfe781 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:40:48,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:40:48,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:40:48,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:40:48,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:40:48,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:40:48,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:40:48,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:40:48,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:40:48,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:40:48,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:40:48,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:40:48,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:40:48,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:40:48,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:40:48,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:40:48,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:40:48,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:40:48,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:40:48,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:40:48,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:40:48,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:40:48,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:40:48,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:40:48,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:40:48,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:40:48,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:40:48,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:40:48,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:40:48,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:40:48,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:40:48,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:40:48,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:40:48,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:40:48,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:40:48,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:40:48,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:40:48,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:40:48,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:40:48,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:40:48,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:40:48,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:40:48,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:40:48,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:40:48,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:40:48,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:40:48,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:40:48,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:40:48,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:40:48,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:40:48,661 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:40:48,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:40:48,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:40:48,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:40:48,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:40:48,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:40:48,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:40:48,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:40:48,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:40:48,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:40:48,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:40:48,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:40:48,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:40:48,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:40:48,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:40:48,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:40:48,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:48,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:40:48,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:40:48,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:40:48,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:40:48,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:40:48,665 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:40:48,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:40:48,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:40:48,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:40:48,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b006d8e4231a58992706b525e43e67dd3e0df162d0a378f0ac12d9a99bfe781 [2021-12-15 09:40:48,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:40:48,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:40:48,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:40:48,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:40:48,832 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:40:48,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label47.c [2021-12-15 09:40:48,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52876d119/4378a83b53724bd4a3f1e1ef15b0f2cf/FLAGda706dcf6 [2021-12-15 09:40:49,374 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:40:49,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label47.c [2021-12-15 09:40:49,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52876d119/4378a83b53724bd4a3f1e1ef15b0f2cf/FLAGda706dcf6 [2021-12-15 09:40:49,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52876d119/4378a83b53724bd4a3f1e1ef15b0f2cf [2021-12-15 09:40:49,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:40:49,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:40:49,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:49,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:40:49,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:40:49,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:49" (1/1) ... [2021-12-15 09:40:49,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727c9278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:49, skipping insertion in model container [2021-12-15 09:40:49,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:49" (1/1) ... [2021-12-15 09:40:49,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:40:49,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:40:49,928 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_label47.c[4902,4915] [2021-12-15 09:40:50,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:50,394 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:40:50,420 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_label47.c[4902,4915] [2021-12-15 09:40:50,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:50,789 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:40:50,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50 WrapperNode [2021-12-15 09:40:50,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:50,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:50,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:40:50,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:40:50,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:50,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,065 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:40:51,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:51,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:40:51,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:40:51,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:40:51,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:40:51,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:40:51,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:40:51,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:40:51,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (1/1) ... [2021-12-15 09:40:51,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:51,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:40:51,557 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 09:40:51,567 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 09:40:51,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:40:51,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:40:51,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:40:51,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:40:51,650 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:40:51,651 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:40:54,137 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:40:54,145 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:40:54,146 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:40:54,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:54 BoogieIcfgContainer [2021-12-15 09:40:54,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:40:54,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:40:54,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:40:54,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:40:54,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:40:49" (1/3) ... [2021-12-15 09:40:54,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15acc0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:54, skipping insertion in model container [2021-12-15 09:40:54,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:50" (2/3) ... [2021-12-15 09:40:54,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15acc0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:54, skipping insertion in model container [2021-12-15 09:40:54,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:54" (3/3) ... [2021-12-15 09:40:54,153 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label47.c [2021-12-15 09:40:54,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:40:54,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:40:54,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:40:54,193 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 09:40:54,193 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:40:54,214 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 09:40:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 09:40:54,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:54,218 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] [2021-12-15 09:40:54,219 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2021-12-15 09:40:54,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:54,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304055769] [2021-12-15 09:40:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:54,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:54,468 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 09:40:54,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:54,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304055769] [2021-12-15 09:40:54,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304055769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:54,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:54,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:54,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200572060] [2021-12-15 09:40:54,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:54,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:54,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:54,499 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 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 09:40:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:58,880 INFO L93 Difference]: Finished difference Result 3155 states and 6150 transitions. [2021-12-15 09:40:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:40:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-15 09:40:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:58,901 INFO L225 Difference]: With dead ends: 3155 [2021-12-15 09:40:58,902 INFO L226 Difference]: Without dead ends: 2265 [2021-12-15 09:40:58,907 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 09:40:58,924 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 2415 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 1724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2415 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 5458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1724 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:58,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2415 Valid, 234 Invalid, 5458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 09:40:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-12-15 09:40:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2257. [2021-12-15 09:40:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5350177304964538) internal successors, (3463), 2256 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states 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 09:40:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3463 transitions. [2021-12-15 09:40:59,024 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3463 transitions. Word has length 38 [2021-12-15 09:40:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:59,025 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3463 transitions. [2021-12-15 09:40:59,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 09:40:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3463 transitions. [2021-12-15 09:40:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-15 09:40:59,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:59,037 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:40:59,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:40:59,038 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1158978159, now seen corresponding path program 1 times [2021-12-15 09:40:59,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:59,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433557286] [2021-12-15 09:40:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:59,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 09:40:59,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433557286] [2021-12-15 09:40:59,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433557286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:59,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:59,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:59,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092343985] [2021-12-15 09:40:59,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:59,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:59,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:59,237 INFO L87 Difference]: Start difference. First operand 2257 states and 3463 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 09:41:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:02,156 INFO L93 Difference]: Finished difference Result 6053 states and 9665 transitions. [2021-12-15 09:41:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:41:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 178 [2021-12-15 09:41:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:02,179 INFO L225 Difference]: With dead ends: 6053 [2021-12-15 09:41:02,179 INFO L226 Difference]: Without dead ends: 3761 [2021-12-15 09:41:02,185 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 09:41:02,186 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 706 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:02,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 710 Invalid, 3837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:41:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-12-15 09:41:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3759. [2021-12-15 09:41:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3411389036721661) internal successors, (5040), 3758 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states 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 09:41:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5040 transitions. [2021-12-15 09:41:02,242 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5040 transitions. Word has length 178 [2021-12-15 09:41:02,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:02,242 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5040 transitions. [2021-12-15 09:41:02,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 09:41:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5040 transitions. [2021-12-15 09:41:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-15 09:41:02,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:02,247 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:02,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:41:02,250 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:02,251 INFO L85 PathProgramCache]: Analyzing trace with hash -841867522, now seen corresponding path program 1 times [2021-12-15 09:41:02,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:02,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679370457] [2021-12-15 09:41:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:02,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 09:41:02,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679370457] [2021-12-15 09:41:02,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679370457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:02,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:02,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:41:02,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123608409] [2021-12-15 09:41:02,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:02,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:02,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:02,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:02,395 INFO L87 Difference]: Start difference. First operand 3759 states and 5040 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:04,591 INFO L93 Difference]: Finished difference Result 10520 states and 14359 transitions. [2021-12-15 09:41:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-12-15 09:41:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:04,607 INFO L225 Difference]: With dead ends: 10520 [2021-12-15 09:41:04,608 INFO L226 Difference]: Without dead ends: 6763 [2021-12-15 09:41:04,612 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 09:41:04,613 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 669 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:04,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 486 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:41:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-12-15 09:41:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2021-12-15 09:41:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.251700680272109) internal successors, (8464), 6762 states have internal predecessors, (8464), 0 states have call successors, (0), 0 states 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 09:41:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8464 transitions. [2021-12-15 09:41:04,697 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8464 transitions. Word has length 248 [2021-12-15 09:41:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:04,698 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 8464 transitions. [2021-12-15 09:41:04,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8464 transitions. [2021-12-15 09:41:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-15 09:41:04,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:04,700 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:04,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:41:04,701 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash -711524935, now seen corresponding path program 1 times [2021-12-15 09:41:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:04,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573085410] [2021-12-15 09:41:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:04,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 71 proven. 43 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:41:04,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573085410] [2021-12-15 09:41:04,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573085410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:41:04,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005451170] [2021-12-15 09:41:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:04,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:41:04,849 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 09:41:04,850 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 09:41:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:41:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:41:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:41:05,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:41:05,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005451170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:05,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:41:05,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:41:05,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487443676] [2021-12-15 09:41:05,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:05,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:05,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:41:05,396 INFO L87 Difference]: Start difference. First operand 6763 states and 8464 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 09:41:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:07,704 INFO L93 Difference]: Finished difference Result 16528 states and 21456 transitions. [2021-12-15 09:41:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 261 [2021-12-15 09:41:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:07,727 INFO L225 Difference]: With dead ends: 16528 [2021-12-15 09:41:07,727 INFO L226 Difference]: Without dead ends: 9767 [2021-12-15 09:41:07,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 260 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 09:41:07,735 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 908 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:07,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:41:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-15 09:41:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-15 09:41:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2463649395863199) internal successors, (12172), 9766 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states 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 09:41:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12172 transitions. [2021-12-15 09:41:07,858 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12172 transitions. Word has length 261 [2021-12-15 09:41:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:07,858 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12172 transitions. [2021-12-15 09:41:07,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 09:41:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12172 transitions. [2021-12-15 09:41:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-15 09:41:07,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:07,861 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:41:07,883 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 09:41:08,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:08,072 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1853498483, now seen corresponding path program 1 times [2021-12-15 09:41:08,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255182770] [2021-12-15 09:41:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:08,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-15 09:41:08,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255182770] [2021-12-15 09:41:08,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255182770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:08,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:08,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:08,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582869494] [2021-12-15 09:41:08,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:08,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:08,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:08,163 INFO L87 Difference]: Start difference. First operand 9767 states and 12172 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:10,381 INFO L93 Difference]: Finished difference Result 23287 states and 29350 transitions. [2021-12-15 09:41:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:10,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2021-12-15 09:41:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:10,407 INFO L225 Difference]: With dead ends: 23287 [2021-12-15 09:41:10,411 INFO L226 Difference]: Without dead ends: 13522 [2021-12-15 09:41:10,419 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 09:41:10,420 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 737 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:10,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 1216 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:41:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2021-12-15 09:41:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 13522. [2021-12-15 09:41:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13522 states, 13521 states have (on average 1.174395384956734) internal successors, (15879), 13521 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states 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 09:41:10,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13522 states to 13522 states and 15879 transitions. [2021-12-15 09:41:10,580 INFO L78 Accepts]: Start accepts. Automaton has 13522 states and 15879 transitions. Word has length 278 [2021-12-15 09:41:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:10,581 INFO L470 AbstractCegarLoop]: Abstraction has 13522 states and 15879 transitions. [2021-12-15 09:41:10,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:41:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 13522 states and 15879 transitions. [2021-12-15 09:41:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-12-15 09:41:10,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:10,585 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 09:41:10,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:41:10,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1295343166, now seen corresponding path program 1 times [2021-12-15 09:41:10,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:10,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387001928] [2021-12-15 09:41:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:10,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 09:41:10,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387001928] [2021-12-15 09:41:10,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387001928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:10,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:10,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:10,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515289481] [2021-12-15 09:41:10,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:10,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:10,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:10,693 INFO L87 Difference]: Start difference. First operand 13522 states and 15879 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 09:41:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:13,233 INFO L93 Difference]: Finished difference Result 37556 states and 44585 transitions. [2021-12-15 09:41:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 365 [2021-12-15 09:41:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:13,274 INFO L225 Difference]: With dead ends: 37556 [2021-12-15 09:41:13,274 INFO L226 Difference]: Without dead ends: 24036 [2021-12-15 09:41:13,283 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 09:41:13,286 INFO L933 BasicCegarLoop]: 1215 mSDtfsCounter, 639 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:13,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 1223 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2607 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:41:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24036 states. [2021-12-15 09:41:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24036 to 22534. [2021-12-15 09:41:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.1720587582656548) internal successors, (26410), 22533 states have internal predecessors, (26410), 0 states have call successors, (0), 0 states 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 09:41:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 26410 transitions. [2021-12-15 09:41:13,503 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 26410 transitions. Word has length 365 [2021-12-15 09:41:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 26410 transitions. [2021-12-15 09:41:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 09:41:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 26410 transitions. [2021-12-15 09:41:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-12-15 09:41:13,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:13,513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:13,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:41:13,514 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1445958984, now seen corresponding path program 1 times [2021-12-15 09:41:13,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:13,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768243428] [2021-12-15 09:41:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:13,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 09:41:13,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768243428] [2021-12-15 09:41:13,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768243428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:13,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:13,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:13,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334937509] [2021-12-15 09:41:13,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:13,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:13,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:13,643 INFO L87 Difference]: Start difference. First operand 22534 states and 26410 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 09:41:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:15,850 INFO L93 Difference]: Finished difference Result 51074 states and 59610 transitions. [2021-12-15 09:41:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 369 [2021-12-15 09:41:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:15,884 INFO L225 Difference]: With dead ends: 51074 [2021-12-15 09:41:15,884 INFO L226 Difference]: Without dead ends: 28542 [2021-12-15 09:41:15,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:15,901 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 802 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:15,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 969 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:41:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28542 states. [2021-12-15 09:41:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28542 to 27040. [2021-12-15 09:41:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.144716890417545) internal successors, (30952), 27039 states have internal predecessors, (30952), 0 states have call successors, (0), 0 states 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 09:41:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 30952 transitions. [2021-12-15 09:41:16,163 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 30952 transitions. Word has length 369 [2021-12-15 09:41:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:16,164 INFO L470 AbstractCegarLoop]: Abstraction has 27040 states and 30952 transitions. [2021-12-15 09:41:16,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 09:41:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 30952 transitions. [2021-12-15 09:41:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-12-15 09:41:16,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:16,171 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:41:16,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:41:16,171 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1452349533, now seen corresponding path program 1 times [2021-12-15 09:41:16,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:16,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721703884] [2021-12-15 09:41:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:16,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-15 09:41:16,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:16,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721703884] [2021-12-15 09:41:16,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721703884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:16,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:16,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:16,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505375112] [2021-12-15 09:41:16,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:16,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:16,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:16,285 INFO L87 Difference]: Start difference. First operand 27040 states and 30952 transitions. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:41:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:18,723 INFO L93 Difference]: Finished difference Result 54829 states and 62659 transitions. [2021-12-15 09:41:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:18,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 471 [2021-12-15 09:41:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:18,761 INFO L225 Difference]: With dead ends: 54829 [2021-12-15 09:41:18,762 INFO L226 Difference]: Without dead ends: 27791 [2021-12-15 09:41:18,777 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 09:41:18,778 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 663 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:18,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 269 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:41:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27791 states. [2021-12-15 09:41:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 27040. [2021-12-15 09:41:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.1338437072376937) internal successors, (30658), 27039 states have internal predecessors, (30658), 0 states have call successors, (0), 0 states 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 09:41:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 30658 transitions. [2021-12-15 09:41:19,020 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 30658 transitions. Word has length 471 [2021-12-15 09:41:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:19,021 INFO L470 AbstractCegarLoop]: Abstraction has 27040 states and 30658 transitions. [2021-12-15 09:41:19,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:41:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 30658 transitions. [2021-12-15 09:41:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-12-15 09:41:19,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:19,029 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:41:19,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:41:19,029 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash -274115229, now seen corresponding path program 1 times [2021-12-15 09:41:19,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:19,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317628727] [2021-12-15 09:41:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:19,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 09:41:19,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:19,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317628727] [2021-12-15 09:41:19,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317628727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:19,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:19,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:19,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567008719] [2021-12-15 09:41:19,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:19,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:19,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:19,141 INFO L87 Difference]: Start difference. First operand 27040 states and 30658 transitions. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 09:41:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:21,428 INFO L93 Difference]: Finished difference Result 64592 states and 72972 transitions. [2021-12-15 09:41:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:21,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 482 [2021-12-15 09:41:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:21,476 INFO L225 Difference]: With dead ends: 64592 [2021-12-15 09:41:21,476 INFO L226 Difference]: Without dead ends: 37554 [2021-12-15 09:41:21,492 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 09:41:21,494 INFO L933 BasicCegarLoop]: 1289 mSDtfsCounter, 653 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:21,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1297 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:41:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-12-15 09:41:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 34550. [2021-12-15 09:41:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.1120148195316797) internal successors, (38419), 34549 states have internal predecessors, (38419), 0 states have call successors, (0), 0 states 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 09:41:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 38419 transitions. [2021-12-15 09:41:21,792 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 38419 transitions. Word has length 482 [2021-12-15 09:41:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:21,793 INFO L470 AbstractCegarLoop]: Abstraction has 34550 states and 38419 transitions. [2021-12-15 09:41:21,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 09:41:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 38419 transitions. [2021-12-15 09:41:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-15 09:41:21,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:21,803 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, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:41:21,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:41:21,804 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash 366223893, now seen corresponding path program 1 times [2021-12-15 09:41:21,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:21,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541707098] [2021-12-15 09:41:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:21,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 540 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-12-15 09:41:21,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541707098] [2021-12-15 09:41:21,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541707098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:21,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:21,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:21,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957404204] [2021-12-15 09:41:21,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:21,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:21,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:21,926 INFO L87 Difference]: Start difference. First operand 34550 states and 38419 transitions. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:41:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:24,221 INFO L93 Difference]: Finished difference Result 72102 states and 79878 transitions. [2021-12-15 09:41:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 491 [2021-12-15 09:41:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:24,265 INFO L225 Difference]: With dead ends: 72102 [2021-12-15 09:41:24,266 INFO L226 Difference]: Without dead ends: 36803 [2021-12-15 09:41:24,288 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 09:41:24,289 INFO L933 BasicCegarLoop]: 1061 mSDtfsCounter, 736 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:24,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 1068 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:41:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36803 states. [2021-12-15 09:41:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36803 to 34550. [2021-12-15 09:41:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.0960085675417524) internal successors, (37866), 34549 states have internal predecessors, (37866), 0 states have call successors, (0), 0 states 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 09:41:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 37866 transitions. [2021-12-15 09:41:24,594 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 37866 transitions. Word has length 491 [2021-12-15 09:41:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:24,594 INFO L470 AbstractCegarLoop]: Abstraction has 34550 states and 37866 transitions. [2021-12-15 09:41:24,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:41:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 37866 transitions. [2021-12-15 09:41:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-15 09:41:24,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:24,605 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, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:24,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:41:24,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1673522830, now seen corresponding path program 1 times [2021-12-15 09:41:24,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:24,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564945083] [2021-12-15 09:41:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:24,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 342 proven. 257 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-15 09:41:24,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:24,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564945083] [2021-12-15 09:41:24,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564945083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:41:24,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287660096] [2021-12-15 09:41:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:24,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:24,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:41:24,863 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 09:41:24,864 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 09:41:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:41:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:41:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2021-12-15 09:41:25,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:41:25,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287660096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:25,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:41:25,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:41:25,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616635645] [2021-12-15 09:41:25,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:25,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:25,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:41:25,538 INFO L87 Difference]: Start difference. First operand 34550 states and 37866 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 09:41:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:27,662 INFO L93 Difference]: Finished difference Result 69849 states and 76772 transitions. [2021-12-15 09:41:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 509 [2021-12-15 09:41:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:27,701 INFO L225 Difference]: With dead ends: 69849 [2021-12-15 09:41:27,701 INFO L226 Difference]: Without dead ends: 36052 [2021-12-15 09:41:27,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:41:27,723 INFO L933 BasicCegarLoop]: 1134 mSDtfsCounter, 823 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:27,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1142 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:41:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-12-15 09:41:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 36052. [2021-12-15 09:41:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36052 states, 36051 states have (on average 1.0850461845718566) internal successors, (39117), 36051 states have internal predecessors, (39117), 0 states have call successors, (0), 0 states 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 09:41:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36052 states to 36052 states and 39117 transitions. [2021-12-15 09:41:28,155 INFO L78 Accepts]: Start accepts. Automaton has 36052 states and 39117 transitions. Word has length 509 [2021-12-15 09:41:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:28,155 INFO L470 AbstractCegarLoop]: Abstraction has 36052 states and 39117 transitions. [2021-12-15 09:41:28,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 09:41:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 36052 states and 39117 transitions. [2021-12-15 09:41:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-12-15 09:41:28,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:28,167 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:28,199 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 09:41:28,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 09:41:28,384 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2134027649, now seen corresponding path program 1 times [2021-12-15 09:41:28,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:28,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797769675] [2021-12-15 09:41:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:28,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 545 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-15 09:41:28,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:28,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797769675] [2021-12-15 09:41:28,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797769675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:28,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:28,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:28,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593142001] [2021-12-15 09:41:28,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:28,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:28,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:28,523 INFO L87 Difference]: Start difference. First operand 36052 states and 39117 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 09:41:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:31,159 INFO L93 Difference]: Finished difference Result 96885 states and 105466 transitions. [2021-12-15 09:41:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 542 [2021-12-15 09:41:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:31,227 INFO L225 Difference]: With dead ends: 96885 [2021-12-15 09:41:31,227 INFO L226 Difference]: Without dead ends: 61586 [2021-12-15 09:41:31,254 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 09:41:31,255 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 597 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:31,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 501 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:41:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61586 states. [2021-12-15 09:41:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61586 to 60835. [2021-12-15 09:41:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60835 states, 60834 states have (on average 1.075056711707269) internal successors, (65400), 60834 states have internal predecessors, (65400), 0 states have call successors, (0), 0 states 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 09:41:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60835 states to 60835 states and 65400 transitions. [2021-12-15 09:41:31,838 INFO L78 Accepts]: Start accepts. Automaton has 60835 states and 65400 transitions. Word has length 542 [2021-12-15 09:41:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:31,839 INFO L470 AbstractCegarLoop]: Abstraction has 60835 states and 65400 transitions. [2021-12-15 09:41:31,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 09:41:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 60835 states and 65400 transitions. [2021-12-15 09:41:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-12-15 09:41:31,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:31,857 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:41:31,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:41:31,857 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash -150521351, now seen corresponding path program 1 times [2021-12-15 09:41:31,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:31,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434256207] [2021-12-15 09:41:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:31,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 493 proven. 108 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 09:41:32,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434256207] [2021-12-15 09:41:32,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434256207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:41:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217231151] [2021-12-15 09:41:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:32,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:32,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:41:32,055 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 09:41:32,087 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 09:41:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:41:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:41:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-15 09:41:33,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:41:33,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217231151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:33,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:41:33,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:41:33,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805486570] [2021-12-15 09:41:33,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:33,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:33,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:33,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:33,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:41:33,005 INFO L87 Difference]: Start difference. First operand 60835 states and 65400 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 09:41:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:35,261 INFO L93 Difference]: Finished difference Result 131431 states and 142108 transitions. [2021-12-15 09:41:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:35,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 611 [2021-12-15 09:41:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:35,335 INFO L225 Difference]: With dead ends: 131431 [2021-12-15 09:41:35,335 INFO L226 Difference]: Without dead ends: 71349 [2021-12-15 09:41:35,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 610 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 09:41:35,371 INFO L933 BasicCegarLoop]: 1378 mSDtfsCounter, 578 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:35,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 1386 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:41:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71349 states. [2021-12-15 09:41:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71349 to 68345. [2021-12-15 09:41:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68345 states, 68344 states have (on average 1.0723838230129932) internal successors, (73291), 68344 states have internal predecessors, (73291), 0 states have call successors, (0), 0 states 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 09:41:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68345 states to 68345 states and 73291 transitions. [2021-12-15 09:41:36,218 INFO L78 Accepts]: Start accepts. Automaton has 68345 states and 73291 transitions. Word has length 611 [2021-12-15 09:41:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:36,218 INFO L470 AbstractCegarLoop]: Abstraction has 68345 states and 73291 transitions. [2021-12-15 09:41:36,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 09:41:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 68345 states and 73291 transitions. [2021-12-15 09:41:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2021-12-15 09:41:36,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:36,251 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:36,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:41:36,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:36,457 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:36,457 INFO L85 PathProgramCache]: Analyzing trace with hash 301580832, now seen corresponding path program 1 times [2021-12-15 09:41:36,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:36,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147265822] [2021-12-15 09:41:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:36,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-15 09:41:36,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:36,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147265822] [2021-12-15 09:41:36,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147265822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:36,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:36,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:36,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691474479] [2021-12-15 09:41:36,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:36,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:36,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:36,877 INFO L87 Difference]: Start difference. First operand 68345 states and 73291 transitions. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 09:41:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:39,802 INFO L93 Difference]: Finished difference Result 160720 states and 172812 transitions. [2021-12-15 09:41:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 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 818 [2021-12-15 09:41:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:39,895 INFO L225 Difference]: With dead ends: 160720 [2021-12-15 09:41:39,895 INFO L226 Difference]: Without dead ends: 93128 [2021-12-15 09:41:39,933 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 09:41:39,933 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 634 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2327 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 2327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:39,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 439 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 2327 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:41:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93128 states. [2021-12-15 09:41:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93128 to 91626. [2021-12-15 09:41:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91626 states, 91625 states have (on average 1.0743465211459755) internal successors, (98437), 91625 states have internal predecessors, (98437), 0 states have call successors, (0), 0 states 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 09:41:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91626 states to 91626 states and 98437 transitions. [2021-12-15 09:41:40,952 INFO L78 Accepts]: Start accepts. Automaton has 91626 states and 98437 transitions. Word has length 818 [2021-12-15 09:41:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 91626 states and 98437 transitions. [2021-12-15 09:41:40,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 09:41:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 91626 states and 98437 transitions. [2021-12-15 09:41:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2021-12-15 09:41:40,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:40,995 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:40,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:41:40,995 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash -816333325, now seen corresponding path program 1 times [2021-12-15 09:41:40,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164610460] [2021-12-15 09:41:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:40,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-12-15 09:41:41,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164610460] [2021-12-15 09:41:41,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164610460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:41,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:41,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:41,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976558537] [2021-12-15 09:41:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:41,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:41,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:41,445 INFO L87 Difference]: Start difference. First operand 91626 states and 98437 transitions. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 09:41:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:44,116 INFO L93 Difference]: Finished difference Result 220049 states and 236362 transitions. [2021-12-15 09:41:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 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 950 [2021-12-15 09:41:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:44,290 INFO L225 Difference]: With dead ends: 220049 [2021-12-15 09:41:44,291 INFO L226 Difference]: Without dead ends: 129176 [2021-12-15 09:41:44,476 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 09:41:44,477 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 726 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2563 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 2563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:44,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 458 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 2563 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:41:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129176 states. [2021-12-15 09:41:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129176 to 123168. [2021-12-15 09:41:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123168 states, 123167 states have (on average 1.0688820869226334) internal successors, (131651), 123167 states have internal predecessors, (131651), 0 states have call successors, (0), 0 states 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 09:41:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123168 states to 123168 states and 131651 transitions. [2021-12-15 09:41:45,819 INFO L78 Accepts]: Start accepts. Automaton has 123168 states and 131651 transitions. Word has length 950 [2021-12-15 09:41:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:45,819 INFO L470 AbstractCegarLoop]: Abstraction has 123168 states and 131651 transitions. [2021-12-15 09:41:45,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 09:41:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 123168 states and 131651 transitions. [2021-12-15 09:41:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2021-12-15 09:41:46,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:46,074 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:46,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:41:46,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:46,075 INFO L85 PathProgramCache]: Analyzing trace with hash -641335097, now seen corresponding path program 1 times [2021-12-15 09:41:46,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:46,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687984971] [2021-12-15 09:41:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:46,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-15 09:41:46,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687984971] [2021-12-15 09:41:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687984971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:46,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:46,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:46,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518163061] [2021-12-15 09:41:46,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:46,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:46,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:46,323 INFO L87 Difference]: Start difference. First operand 123168 states and 131651 transitions. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)