./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label38.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/Problem18_label38.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 b3990b85e763534edf1f6c5cc073cba3fb338d90da8c9274c5799f3d3cad0b12 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:04:07,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:04:07,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:04:07,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:04:07,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:04:07,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:04:07,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:04:07,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:04:07,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:04:07,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:04:07,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:04:07,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:04:07,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:04:07,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:04:07,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:04:07,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:04:07,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:04:07,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:04:07,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:04:07,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:04:07,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:04:07,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:04:07,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:04:07,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:04:07,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:04:07,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:04:07,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:04:07,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:04:07,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:04:07,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:04:07,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:04:07,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:04:07,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:04:07,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:04:07,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:04:07,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:04:07,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:04:07,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:04:07,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:04:07,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:04:07,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:04:07,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:04:07,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:04:07,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:04:07,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:04:07,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:04:07,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:04:07,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:04:07,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:04:07,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:04:07,647 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:04:07,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:04:07,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:04:07,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:04:07,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:04:07,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:04:07,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:04:07,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:04:07,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:04:07,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:04:07,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:04:07,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:04:07,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:04:07,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:04:07,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:04:07,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:04:07,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:04:07,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:04:07,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:04:07,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:04:07,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:04:07,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:04:07,652 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:04:07,652 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:04:07,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:04:07,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:04:07,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3990b85e763534edf1f6c5cc073cba3fb338d90da8c9274c5799f3d3cad0b12 [2021-12-15 10:04:07,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:04:07,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:04:07,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:04:07,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:04:07,896 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:04:07,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label38.c [2021-12-15 10:04:07,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/818482051/a46d09c0018b4af1a4be580fcf621c60/FLAGf85e872ce [2021-12-15 10:04:08,485 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:04:08,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label38.c [2021-12-15 10:04:08,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/818482051/a46d09c0018b4af1a4be580fcf621c60/FLAGf85e872ce [2021-12-15 10:04:08,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/818482051/a46d09c0018b4af1a4be580fcf621c60 [2021-12-15 10:04:08,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:04:08,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:04:08,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:04:08,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:04:08,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:04:08,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:08" (1/1) ... [2021-12-15 10:04:08,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8d421f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:08, skipping insertion in model container [2021-12-15 10:04:08,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:08" (1/1) ... [2021-12-15 10:04:08,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:04:08,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:04:08,927 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/Problem18_label38.c[2385,2398] [2021-12-15 10:04:09,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:04:09,411 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:04:09,430 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/Problem18_label38.c[2385,2398] [2021-12-15 10:04:09,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:04:09,687 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:04:09,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09 WrapperNode [2021-12-15 10:04:09,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:04:09,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:04:09,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:04:09,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:04:09,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:09,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:09,867 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-12-15 10:04:09,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:04:09,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:04:09,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:04:09,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:04:09,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:09,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:09,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:09,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:09,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:09,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:10,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:10,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:04:10,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:04:10,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:04:10,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:04:10,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (1/1) ... [2021-12-15 10:04:10,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:04:10,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:10,130 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 10:04:10,135 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 10:04:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:04:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:04:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:04:10,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:04:10,213 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:04:10,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:04:12,522 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:04:12,532 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:04:12,533 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:04:12,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:12 BoogieIcfgContainer [2021-12-15 10:04:12,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:04:12,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:04:12,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:04:12,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:04:12,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:04:08" (1/3) ... [2021-12-15 10:04:12,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1538aa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:12, skipping insertion in model container [2021-12-15 10:04:12,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:09" (2/3) ... [2021-12-15 10:04:12,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1538aa54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:12, skipping insertion in model container [2021-12-15 10:04:12,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:12" (3/3) ... [2021-12-15 10:04:12,541 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label38.c [2021-12-15 10:04:12,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:04:12,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:04:12,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:04:12,584 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 10:04:12,584 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:04:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 10:04:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 10:04:12,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:12,630 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] [2021-12-15 10:04:12,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2021-12-15 10:04:12,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059083424] [2021-12-15 10:04:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:12,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:12,784 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 10:04:12,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059083424] [2021-12-15 10:04:12,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059083424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:12,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:12,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:12,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025320910] [2021-12-15 10:04:12,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:12,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:04:12,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:12,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:04:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:04:12,816 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 10:04:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:16,991 INFO L93 Difference]: Finished difference Result 2910 states and 5661 transitions. [2021-12-15 10:04:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:04:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-15 10:04:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:17,020 INFO L225 Difference]: With dead ends: 2910 [2021-12-15 10:04:17,021 INFO L226 Difference]: Without dead ends: 2080 [2021-12-15 10:04:17,029 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 10:04:17,032 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2193 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 1774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2193 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1774 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:17,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2193 Valid, 168 Invalid, 5164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1774 Valid, 3390 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-15 10:04:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-12-15 10:04:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2074. [2021-12-15 10:04:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.5561987457790643) internal successors, (3226), 2073 states have internal predecessors, (3226), 0 states have call successors, (0), 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 10:04:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3226 transitions. [2021-12-15 10:04:17,125 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3226 transitions. Word has length 20 [2021-12-15 10:04:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:17,126 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 3226 transitions. [2021-12-15 10:04:17,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 10:04:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3226 transitions. [2021-12-15 10:04:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-15 10:04:17,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:17,135 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:17,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:04:17,136 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1283296221, now seen corresponding path program 1 times [2021-12-15 10:04:17,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:17,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597123572] [2021-12-15 10:04:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:17,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 10:04:17,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:17,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597123572] [2021-12-15 10:04:17,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597123572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:17,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:17,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:17,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172523879] [2021-12-15 10:04:17,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:17,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:04:17,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:04:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:04:17,371 INFO L87 Difference]: Start difference. First operand 2074 states and 3226 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 10:04:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:20,514 INFO L93 Difference]: Finished difference Result 6216 states and 9564 transitions. [2021-12-15 10:04:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:04:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 180 [2021-12-15 10:04:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:20,526 INFO L225 Difference]: With dead ends: 6216 [2021-12-15 10:04:20,527 INFO L226 Difference]: Without dead ends: 4144 [2021-12-15 10:04:20,529 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 10:04:20,530 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 1922 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4114 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 4114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:20,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 647 Invalid, 4635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 4114 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 10:04:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-12-15 10:04:20,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2021-12-15 10:04:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.2927830074825006) internal successors, (5356), 4143 states have internal predecessors, (5356), 0 states have call successors, (0), 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 10:04:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5356 transitions. [2021-12-15 10:04:20,605 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5356 transitions. Word has length 180 [2021-12-15 10:04:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:20,605 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5356 transitions. [2021-12-15 10:04:20,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 10:04:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5356 transitions. [2021-12-15 10:04:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-15 10:04:20,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:20,608 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:20,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:04:20,608 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -383061818, now seen corresponding path program 1 times [2021-12-15 10:04:20,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:20,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152223694] [2021-12-15 10:04:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:20,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:20,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:20,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152223694] [2021-12-15 10:04:20,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152223694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:20,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:20,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:20,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712200755] [2021-12-15 10:04:20,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:20,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:04:20,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:04:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:04:20,804 INFO L87 Difference]: Start difference. First operand 4144 states and 5356 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 10:04:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:23,268 INFO L93 Difference]: Finished difference Result 9029 states and 11975 transitions. [2021-12-15 10:04:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:04:23,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 269 [2021-12-15 10:04:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:23,283 INFO L225 Difference]: With dead ends: 9029 [2021-12-15 10:04:23,283 INFO L226 Difference]: Without dead ends: 5524 [2021-12-15 10:04:23,287 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 10:04:23,288 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 531 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:23,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 636 Invalid, 3457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 10:04:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-12-15 10:04:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 5524. [2021-12-15 10:04:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.1611443056309976) internal successors, (6413), 5523 states have internal predecessors, (6413), 0 states have call successors, (0), 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 10:04:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 6413 transitions. [2021-12-15 10:04:23,358 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 6413 transitions. Word has length 269 [2021-12-15 10:04:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:23,359 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 6413 transitions. [2021-12-15 10:04:23,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 10:04:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 6413 transitions. [2021-12-15 10:04:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2021-12-15 10:04:23,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:23,373 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:23,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:04:23,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:23,375 INFO L85 PathProgramCache]: Analyzing trace with hash 377312405, now seen corresponding path program 1 times [2021-12-15 10:04:23,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:23,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402057498] [2021-12-15 10:04:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:23,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-15 10:04:24,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402057498] [2021-12-15 10:04:24,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402057498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:24,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:24,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:24,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850529880] [2021-12-15 10:04:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:24,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:24,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:24,156 INFO L87 Difference]: Start difference. First operand 5524 states and 6413 transitions. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 10:04:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:26,416 INFO L93 Difference]: Finished difference Result 13806 states and 16458 transitions. [2021-12-15 10:04:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 901 [2021-12-15 10:04:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:26,462 INFO L225 Difference]: With dead ends: 13806 [2021-12-15 10:04:26,462 INFO L226 Difference]: Without dead ends: 8974 [2021-12-15 10:04:26,469 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 10:04:26,477 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 644 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:26,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 105 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 10:04:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-12-15 10:04:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8284. [2021-12-15 10:04:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 1.193408185440058) internal successors, (9885), 8283 states have internal predecessors, (9885), 0 states have call successors, (0), 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 10:04:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 9885 transitions. [2021-12-15 10:04:26,585 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 9885 transitions. Word has length 901 [2021-12-15 10:04:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:26,587 INFO L470 AbstractCegarLoop]: Abstraction has 8284 states and 9885 transitions. [2021-12-15 10:04:26,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 10:04:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 9885 transitions. [2021-12-15 10:04:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2021-12-15 10:04:26,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:26,654 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:26,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:04:26,655 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:26,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1132034408, now seen corresponding path program 1 times [2021-12-15 10:04:26,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:26,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743110301] [2021-12-15 10:04:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:26,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-12-15 10:04:27,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:27,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743110301] [2021-12-15 10:04:27,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743110301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:27,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:27,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:04:27,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190097261] [2021-12-15 10:04:27,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:27,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:27,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:27,020 INFO L87 Difference]: Start difference. First operand 8284 states and 9885 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 10:04:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:28,499 INFO L93 Difference]: Finished difference Result 17946 states and 21835 transitions. [2021-12-15 10:04:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 919 [2021-12-15 10:04:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:28,525 INFO L225 Difference]: With dead ends: 17946 [2021-12-15 10:04:28,525 INFO L226 Difference]: Without dead ends: 10354 [2021-12-15 10:04:28,533 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 10:04:28,534 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 189 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:28,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 365 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 10:04:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10354 states. [2021-12-15 10:04:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10354 to 10354. [2021-12-15 10:04:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 1.17627740751473) internal successors, (12178), 10353 states have internal predecessors, (12178), 0 states have call successors, (0), 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 10:04:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 12178 transitions. [2021-12-15 10:04:28,709 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 12178 transitions. Word has length 919 [2021-12-15 10:04:28,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:28,710 INFO L470 AbstractCegarLoop]: Abstraction has 10354 states and 12178 transitions. [2021-12-15 10:04:28,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 10:04:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 12178 transitions. [2021-12-15 10:04:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2021-12-15 10:04:28,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:28,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:28,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 10:04:28,722 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1803204251, now seen corresponding path program 1 times [2021-12-15 10:04:28,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:28,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028623053] [2021-12-15 10:04:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:28,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-15 10:04:29,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028623053] [2021-12-15 10:04:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028623053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:29,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:29,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:29,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658853039] [2021-12-15 10:04:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:29,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:29,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:29,018 INFO L87 Difference]: Start difference. First operand 10354 states and 12178 transitions. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 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 10:04:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:30,867 INFO L93 Difference]: Finished difference Result 23466 states and 27892 transitions. [2021-12-15 10:04:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:30,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 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 980 [2021-12-15 10:04:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:30,887 INFO L225 Difference]: With dead ends: 23466 [2021-12-15 10:04:30,888 INFO L226 Difference]: Without dead ends: 13804 [2021-12-15 10:04:30,895 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 10:04:30,895 INFO L933 BasicCegarLoop]: 1101 mSDtfsCounter, 544 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:30,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1108 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 10:04:30,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2021-12-15 10:04:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13804. [2021-12-15 10:04:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13804 states, 13803 states have (on average 1.1598927769325509) internal successors, (16010), 13803 states have internal predecessors, (16010), 0 states have call successors, (0), 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 10:04:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 16010 transitions. [2021-12-15 10:04:31,030 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 16010 transitions. Word has length 980 [2021-12-15 10:04:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:31,032 INFO L470 AbstractCegarLoop]: Abstraction has 13804 states and 16010 transitions. [2021-12-15 10:04:31,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 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 10:04:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 16010 transitions. [2021-12-15 10:04:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2021-12-15 10:04:31,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:31,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:31,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:04:31,046 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash -99005628, now seen corresponding path program 1 times [2021-12-15 10:04:31,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:31,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215749157] [2021-12-15 10:04:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:31,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2021-12-15 10:04:31,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:31,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215749157] [2021-12-15 10:04:31,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215749157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:31,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:31,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:04:31,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386778308] [2021-12-15 10:04:31,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:31,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:31,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:31,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:31,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:31,346 INFO L87 Difference]: Start difference. First operand 13804 states and 16010 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 10:04:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:33,142 INFO L93 Difference]: Finished difference Result 32436 states and 38949 transitions. [2021-12-15 10:04:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:33,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 987 [2021-12-15 10:04:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:33,214 INFO L225 Difference]: With dead ends: 32436 [2021-12-15 10:04:33,215 INFO L226 Difference]: Without dead ends: 20014 [2021-12-15 10:04:33,226 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 10:04:33,240 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 226 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:33,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 389 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 10:04:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20014 states. [2021-12-15 10:04:33,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20014 to 18634. [2021-12-15 10:04:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18634 states, 18633 states have (on average 1.1357806043041916) internal successors, (21163), 18633 states have internal predecessors, (21163), 0 states have call successors, (0), 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 10:04:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 21163 transitions. [2021-12-15 10:04:33,431 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 21163 transitions. Word has length 987 [2021-12-15 10:04:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:33,431 INFO L470 AbstractCegarLoop]: Abstraction has 18634 states and 21163 transitions. [2021-12-15 10:04:33,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 10:04:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 21163 transitions. [2021-12-15 10:04:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2021-12-15 10:04:33,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:33,440 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:33,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 10:04:33,440 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1904550513, now seen corresponding path program 1 times [2021-12-15 10:04:33,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:33,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276924502] [2021-12-15 10:04:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:33,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2021-12-15 10:04:33,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:33,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276924502] [2021-12-15 10:04:33,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276924502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:33,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:33,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:33,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177199157] [2021-12-15 10:04:33,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:33,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:33,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:33,743 INFO L87 Difference]: Start difference. First operand 18634 states and 21163 transitions. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 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 10:04:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:35,594 INFO L93 Difference]: Finished difference Result 35886 states and 40940 transitions. [2021-12-15 10:04:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 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 1005 [2021-12-15 10:04:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:35,651 INFO L225 Difference]: With dead ends: 35886 [2021-12-15 10:04:35,651 INFO L226 Difference]: Without dead ends: 18634 [2021-12-15 10:04:35,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 10:04:35,686 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 777 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:35,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 780 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 10:04:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2021-12-15 10:04:35,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 18634. [2021-12-15 10:04:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18634 states, 18633 states have (on average 1.1128642730639189) internal successors, (20736), 18633 states have internal predecessors, (20736), 0 states have call successors, (0), 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 10:04:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 20736 transitions. [2021-12-15 10:04:36,013 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 20736 transitions. Word has length 1005 [2021-12-15 10:04:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:36,014 INFO L470 AbstractCegarLoop]: Abstraction has 18634 states and 20736 transitions. [2021-12-15 10:04:36,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 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 10:04:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 20736 transitions. [2021-12-15 10:04:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2021-12-15 10:04:36,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:36,061 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:36,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 10:04:36,062 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2111500094, now seen corresponding path program 1 times [2021-12-15 10:04:36,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268056821] [2021-12-15 10:04:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:36,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 350 proven. 555 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-12-15 10:04:36,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:36,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268056821] [2021-12-15 10:04:36,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268056821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:36,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210973944] [2021-12-15 10:04:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:36,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:36,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:36,860 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 10:04:36,861 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 10:04:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2021-12-15 10:04:38,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:38,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210973944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:38,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:38,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 10:04:38,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980384068] [2021-12-15 10:04:38,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:38,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:38,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:38,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:04:38,636 INFO L87 Difference]: Start difference. First operand 18634 states and 20736 transitions. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 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 10:04:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:40,128 INFO L93 Difference]: Finished difference Result 40716 states and 45753 transitions. [2021-12-15 10:04:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 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 1095 [2021-12-15 10:04:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:40,151 INFO L225 Difference]: With dead ends: 40716 [2021-12-15 10:04:40,151 INFO L226 Difference]: Without dead ends: 20014 [2021-12-15 10:04:40,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1095 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:04:40,163 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 649 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:40,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 973 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 10:04:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20014 states. [2021-12-15 10:04:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20014 to 19324. [2021-12-15 10:04:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19324 states, 19323 states have (on average 1.0582207731718678) internal successors, (20448), 19323 states have internal predecessors, (20448), 0 states have call successors, (0), 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 10:04:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 20448 transitions. [2021-12-15 10:04:40,306 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 20448 transitions. Word has length 1095 [2021-12-15 10:04:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:40,307 INFO L470 AbstractCegarLoop]: Abstraction has 19324 states and 20448 transitions. [2021-12-15 10:04:40,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 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 10:04:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 20448 transitions. [2021-12-15 10:04:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1262 [2021-12-15 10:04:40,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:40,322 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:40,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 10:04:40,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:40,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:40,540 INFO L85 PathProgramCache]: Analyzing trace with hash 784749773, now seen corresponding path program 1 times [2021-12-15 10:04:40,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:40,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550010810] [2021-12-15 10:04:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:40,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 1051 proven. 0 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2021-12-15 10:04:40,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:40,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550010810] [2021-12-15 10:04:40,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550010810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:40,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:40,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:40,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610121638] [2021-12-15 10:04:40,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:40,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:40,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:40,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:40,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:40,831 INFO L87 Difference]: Start difference. First operand 19324 states and 20448 transitions. Second operand has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 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 10:04:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:41,935 INFO L93 Difference]: Finished difference Result 37956 states and 40203 transitions. [2021-12-15 10:04:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 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 1261 [2021-12-15 10:04:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:41,954 INFO L225 Difference]: With dead ends: 37956 [2021-12-15 10:04:41,955 INFO L226 Difference]: Without dead ends: 19324 [2021-12-15 10:04:41,966 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 10:04:41,967 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 600 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:41,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 927 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 10:04:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19324 states. [2021-12-15 10:04:42,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19324 to 19324. [2021-12-15 10:04:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19324 states, 19323 states have (on average 1.0509755213993686) internal successors, (20308), 19323 states have internal predecessors, (20308), 0 states have call successors, (0), 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 10:04:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 20308 transitions. [2021-12-15 10:04:42,130 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 20308 transitions. Word has length 1261 [2021-12-15 10:04:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:42,131 INFO L470 AbstractCegarLoop]: Abstraction has 19324 states and 20308 transitions. [2021-12-15 10:04:42,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 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 10:04:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 20308 transitions. [2021-12-15 10:04:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1287 [2021-12-15 10:04:42,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:42,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:42,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 10:04:42,151 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:42,151 INFO L85 PathProgramCache]: Analyzing trace with hash -405433271, now seen corresponding path program 1 times [2021-12-15 10:04:42,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:42,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607708114] [2021-12-15 10:04:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:42,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 1151 proven. 330 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-15 10:04:42,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:42,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607708114] [2021-12-15 10:04:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607708114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:42,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69453325] [2021-12-15 10:04:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:42,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:42,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:42,564 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 10:04:42,577 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 10:04:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:42,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 977 proven. 0 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2021-12-15 10:04:43,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:43,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69453325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:43,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:43,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:04:43,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646540316] [2021-12-15 10:04:43,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:43,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:43,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:43,809 INFO L87 Difference]: Start difference. First operand 19324 states and 20308 transitions. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 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 10:04:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:45,247 INFO L93 Difference]: Finished difference Result 46236 states and 49015 transitions. [2021-12-15 10:04:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 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 1286 [2021-12-15 10:04:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:45,273 INFO L225 Difference]: With dead ends: 46236 [2021-12-15 10:04:45,274 INFO L226 Difference]: Without dead ends: 27604 [2021-12-15 10:04:45,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1285 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:45,287 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 562 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:45,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 121 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 10:04:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27604 states. [2021-12-15 10:04:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27604 to 27604. [2021-12-15 10:04:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27604 states, 27603 states have (on average 1.0512263159801472) internal successors, (29017), 27603 states have internal predecessors, (29017), 0 states have call successors, (0), 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 10:04:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27604 states to 27604 states and 29017 transitions. [2021-12-15 10:04:45,487 INFO L78 Accepts]: Start accepts. Automaton has 27604 states and 29017 transitions. Word has length 1286 [2021-12-15 10:04:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:45,488 INFO L470 AbstractCegarLoop]: Abstraction has 27604 states and 29017 transitions. [2021-12-15 10:04:45,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 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 10:04:45,489 INFO L276 IsEmpty]: Start isEmpty. Operand 27604 states and 29017 transitions. [2021-12-15 10:04:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1338 [2021-12-15 10:04:45,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:45,553 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:45,573 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 10:04:45,771 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 10:04:45,771 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1269928975, now seen corresponding path program 1 times [2021-12-15 10:04:45,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:45,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205657817] [2021-12-15 10:04:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:45,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 1371 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-12-15 10:04:46,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205657817] [2021-12-15 10:04:46,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205657817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:46,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:46,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:46,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296915995] [2021-12-15 10:04:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:46,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:46,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:46,106 INFO L87 Difference]: Start difference. First operand 27604 states and 29017 transitions. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 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 10:04:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:47,432 INFO L93 Difference]: Finished difference Result 62106 states and 65559 transitions. [2021-12-15 10:04:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 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 1337 [2021-12-15 10:04:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:47,501 INFO L225 Difference]: With dead ends: 62106 [2021-12-15 10:04:47,519 INFO L226 Difference]: Without dead ends: 35194 [2021-12-15 10:04:47,553 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 10:04:47,554 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 574 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:47,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 971 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 10:04:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35194 states. [2021-12-15 10:04:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35194 to 34504. [2021-12-15 10:04:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34504 states, 34503 states have (on average 1.0488942990464598) internal successors, (36190), 34503 states have internal predecessors, (36190), 0 states have call successors, (0), 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 10:04:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 36190 transitions. [2021-12-15 10:04:47,975 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 36190 transitions. Word has length 1337 [2021-12-15 10:04:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:47,975 INFO L470 AbstractCegarLoop]: Abstraction has 34504 states and 36190 transitions. [2021-12-15 10:04:47,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 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 10:04:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 36190 transitions. [2021-12-15 10:04:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1366 [2021-12-15 10:04:48,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:48,014 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:48,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 10:04:48,015 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash 678866616, now seen corresponding path program 1 times [2021-12-15 10:04:48,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:48,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020047235] [2021-12-15 10:04:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:48,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 1402 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2021-12-15 10:04:48,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:48,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020047235] [2021-12-15 10:04:48,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020047235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:48,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:48,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:48,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148581417] [2021-12-15 10:04:48,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:48,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:48,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:48,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:48,373 INFO L87 Difference]: Start difference. First operand 34504 states and 36190 transitions. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 10:04:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:50,134 INFO L93 Difference]: Finished difference Result 74526 states and 78376 transitions. [2021-12-15 10:04:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 1365 [2021-12-15 10:04:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:50,170 INFO L225 Difference]: With dead ends: 74526 [2021-12-15 10:04:50,170 INFO L226 Difference]: Without dead ends: 40714 [2021-12-15 10:04:50,184 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 10:04:50,185 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 585 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:50,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 279 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 10:04:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40714 states. [2021-12-15 10:04:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40714 to 40024. [2021-12-15 10:04:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40024 states, 40023 states have (on average 1.0478474876945756) internal successors, (41938), 40023 states have internal predecessors, (41938), 0 states have call successors, (0), 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 10:04:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 41938 transitions. [2021-12-15 10:04:50,552 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 41938 transitions. Word has length 1365 [2021-12-15 10:04:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:50,553 INFO L470 AbstractCegarLoop]: Abstraction has 40024 states and 41938 transitions. [2021-12-15 10:04:50,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 10:04:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 41938 transitions. [2021-12-15 10:04:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2021-12-15 10:04:50,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:50,576 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:50,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 10:04:50,576 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1110905597, now seen corresponding path program 1 times [2021-12-15 10:04:50,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:50,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283958322] [2021-12-15 10:04:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:50,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 1534 proven. 330 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2021-12-15 10:04:50,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283958322] [2021-12-15 10:04:50,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283958322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593917982] [2021-12-15 10:04:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:50,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:50,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:50,972 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 10:04:50,973 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 10:04:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:51,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 795 proven. 0 refuted. 0 times theorem prover too weak. 1535 trivial. 0 not checked. [2021-12-15 10:04:52,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:52,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593917982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:52,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:52,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:04:52,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402083910] [2021-12-15 10:04:52,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:52,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:52,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:52,609 INFO L87 Difference]: Start difference. First operand 40024 states and 41938 transitions. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 10:04:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:53,699 INFO L93 Difference]: Finished difference Result 84186 states and 88389 transitions. [2021-12-15 10:04:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 1419 [2021-12-15 10:04:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:53,740 INFO L225 Difference]: With dead ends: 84186 [2021-12-15 10:04:53,740 INFO L226 Difference]: Without dead ends: 42784 [2021-12-15 10:04:53,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1425 GetRequests, 1418 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:53,764 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 577 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:53,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 848 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 10:04:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2021-12-15 10:04:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 42784. [2021-12-15 10:04:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42784 states, 42783 states have (on average 1.0428908678680784) internal successors, (44618), 42783 states have internal predecessors, (44618), 0 states have call successors, (0), 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 10:04:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 44618 transitions. [2021-12-15 10:04:54,087 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 44618 transitions. Word has length 1419 [2021-12-15 10:04:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:54,088 INFO L470 AbstractCegarLoop]: Abstraction has 42784 states and 44618 transitions. [2021-12-15 10:04:54,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 10:04:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 44618 transitions. [2021-12-15 10:04:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1421 [2021-12-15 10:04:54,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:54,192 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:54,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:04:54,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:54,404 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2031907352, now seen corresponding path program 1 times [2021-12-15 10:04:54,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085251774] [2021-12-15 10:04:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:54,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 1536 proven. 330 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-12-15 10:04:54,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:54,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085251774] [2021-12-15 10:04:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085251774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298463630] [2021-12-15 10:04:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:54,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:54,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:54,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:04:54,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:04:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:55,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 1297 proven. 0 refuted. 0 times theorem prover too weak. 1037 trivial. 0 not checked. [2021-12-15 10:04:56,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298463630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:56,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:56,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:04:56,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743973419] [2021-12-15 10:04:56,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:56,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:56,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:56,328 INFO L87 Difference]: Start difference. First operand 42784 states and 44618 transitions. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 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 10:04:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:57,549 INFO L93 Difference]: Finished difference Result 84876 states and 88543 transitions. [2021-12-15 10:04:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 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 1420 [2021-12-15 10:04:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:57,584 INFO L225 Difference]: With dead ends: 84876 [2021-12-15 10:04:57,585 INFO L226 Difference]: Without dead ends: 42784 [2021-12-15 10:04:57,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1426 GetRequests, 1419 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:57,599 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 561 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:57,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 919 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 10:04:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2021-12-15 10:04:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 42784. [2021-12-15 10:04:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42784 states, 42783 states have (on average 1.037538274548302) internal successors, (44389), 42783 states have internal predecessors, (44389), 0 states have call successors, (0), 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 10:04:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 44389 transitions. [2021-12-15 10:04:57,909 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 44389 transitions. Word has length 1420 [2021-12-15 10:04:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:57,909 INFO L470 AbstractCegarLoop]: Abstraction has 42784 states and 44389 transitions. [2021-12-15 10:04:57,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 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 10:04:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 44389 transitions. [2021-12-15 10:04:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1437 [2021-12-15 10:04:57,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:57,931 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:57,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 10:04:58,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 10:04:58,153 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash -284691264, now seen corresponding path program 1 times [2021-12-15 10:04:58,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:58,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189373190] [2021-12-15 10:04:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:58,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 1540 proven. 330 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-12-15 10:04:58,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189373190] [2021-12-15 10:04:58,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189373190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842695620] [2021-12-15 10:04:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:58,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:58,556 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:04:58,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:04:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:05:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2285 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 1729 trivial. 0 not checked. [2021-12-15 10:05:00,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:05:00,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842695620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:05:00,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:05:00,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:05:00,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420715588] [2021-12-15 10:05:00,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:05:00,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:05:00,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:05:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:05:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:00,413 INFO L87 Difference]: Start difference. First operand 42784 states and 44389 transitions. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 10:05:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:05:01,852 INFO L93 Difference]: Finished difference Result 85566 states and 88776 transitions. [2021-12-15 10:05:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:05:01,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 1436 [2021-12-15 10:05:01,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:05:01,898 INFO L225 Difference]: With dead ends: 85566 [2021-12-15 10:05:01,898 INFO L226 Difference]: Without dead ends: 42784 [2021-12-15 10:05:01,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1442 GetRequests, 1435 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:01,939 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 617 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:05:01,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 55 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 10:05:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2021-12-15 10:05:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 42784. [2021-12-15 10:05:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42784 states, 42783 states have (on average 1.036299464740668) internal successors, (44336), 42783 states have internal predecessors, (44336), 0 states have call successors, (0), 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 10:05:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 44336 transitions. [2021-12-15 10:05:02,380 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 44336 transitions. Word has length 1436 [2021-12-15 10:05:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:05:02,381 INFO L470 AbstractCegarLoop]: Abstraction has 42784 states and 44336 transitions. [2021-12-15 10:05:02,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 10:05:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 44336 transitions. [2021-12-15 10:05:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1474 [2021-12-15 10:05:02,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:05:02,403 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:02,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:05:02,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 10:05:02,620 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:05:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:05:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1900867293, now seen corresponding path program 1 times [2021-12-15 10:05:02,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:05:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698133148] [2021-12-15 10:05:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:02,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:05:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1703 proven. 330 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-12-15 10:05:03,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:05:03,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698133148] [2021-12-15 10:05:03,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698133148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:05:03,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077821268] [2021-12-15 10:05:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:03,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:05:03,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:05:03,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:05:03,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 10:05:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:05:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:05:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1502 proven. 0 refuted. 0 times theorem prover too weak. 1179 trivial. 0 not checked. [2021-12-15 10:05:05,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:05:05,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077821268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:05:05,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:05:05,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:05:05,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175918780] [2021-12-15 10:05:05,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:05:05,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:05:05,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:05:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:05:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:05,154 INFO L87 Difference]: Start difference. First operand 42784 states and 44336 transitions. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 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 10:05:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:05:06,272 INFO L93 Difference]: Finished difference Result 84186 states and 87285 transitions. [2021-12-15 10:05:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:05:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 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 1473 [2021-12-15 10:05:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:05:06,341 INFO L225 Difference]: With dead ends: 84186 [2021-12-15 10:05:06,341 INFO L226 Difference]: Without dead ends: 42094 [2021-12-15 10:05:06,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1479 GetRequests, 1472 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:06,366 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 634 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 10:05:06,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 894 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 10:05:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2021-12-15 10:05:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 41404. [2021-12-15 10:05:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0319300533777747) internal successors, (42725), 41403 states have internal predecessors, (42725), 0 states have call successors, (0), 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 10:05:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 42725 transitions. [2021-12-15 10:05:06,708 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 42725 transitions. Word has length 1473 [2021-12-15 10:05:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:05:06,709 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 42725 transitions. [2021-12-15 10:05:06,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 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 10:05:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 42725 transitions. [2021-12-15 10:05:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1524 [2021-12-15 10:05:06,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:05:06,780 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:06,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:05:06,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 10:05:06,981 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:05:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:05:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1289650214, now seen corresponding path program 1 times [2021-12-15 10:05:06,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:05:06,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162317664] [2021-12-15 10:05:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:06,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:05:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3176 backedges. 2087 proven. 0 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-12-15 10:05:07,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:05:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162317664] [2021-12-15 10:05:07,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162317664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:05:07,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:05:07,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:05:07,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903102996] [2021-12-15 10:05:07,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:05:07,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:05:07,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:05:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:05:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:05:07,705 INFO L87 Difference]: Start difference. First operand 41404 states and 42725 transitions. Second operand has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 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 10:05:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:05:09,266 INFO L93 Difference]: Finished difference Result 91776 states and 94780 transitions. [2021-12-15 10:05:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:05:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 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 1523 [2021-12-15 10:05:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:05:09,319 INFO L225 Difference]: With dead ends: 91776 [2021-12-15 10:05:09,319 INFO L226 Difference]: Without dead ends: 51064 [2021-12-15 10:05:09,345 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 10:05:09,346 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 593 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:05:09,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 976 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 10:05:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51064 states. [2021-12-15 10:05:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51064 to 50374. [2021-12-15 10:05:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50374 states, 50373 states have (on average 1.029638893851865) internal successors, (51866), 50373 states have internal predecessors, (51866), 0 states have call successors, (0), 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 10:05:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 51866 transitions. [2021-12-15 10:05:09,779 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 51866 transitions. Word has length 1523 [2021-12-15 10:05:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:05:09,780 INFO L470 AbstractCegarLoop]: Abstraction has 50374 states and 51866 transitions. [2021-12-15 10:05:09,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 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 10:05:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 51866 transitions. [2021-12-15 10:05:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1561 [2021-12-15 10:05:09,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:05:09,807 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:09,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 10:05:09,807 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:05:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:05:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash -665107017, now seen corresponding path program 1 times [2021-12-15 10:05:09,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:05:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379380062] [2021-12-15 10:05:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:09,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:05:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3417 backedges. 2509 proven. 0 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-12-15 10:05:10,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:05:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379380062] [2021-12-15 10:05:10,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379380062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:05:10,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:05:10,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 10:05:10,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228609622] [2021-12-15 10:05:10,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:05:10,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:05:10,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:05:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:05:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:05:10,180 INFO L87 Difference]: Start difference. First operand 50374 states and 51866 transitions. Second operand has 5 states, 5 states have (on average 189.8) internal successors, (949), 5 states have internal predecessors, (949), 0 states have call successors, (0), 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 10:05:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:05:13,053 INFO L93 Difference]: Finished difference Result 100906 states and 103916 transitions. [2021-12-15 10:05:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 10:05:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 189.8) internal successors, (949), 5 states have internal predecessors, (949), 0 states have call successors, (0), 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 1560 [2021-12-15 10:05:13,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:05:13,106 INFO L225 Difference]: With dead ends: 100906 [2021-12-15 10:05:13,106 INFO L226 Difference]: Without dead ends: 51224 [2021-12-15 10:05:13,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:05:13,136 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 1662 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 5092 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 5092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:05:13,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 1564 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 5092 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 10:05:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51224 states. [2021-12-15 10:05:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51224 to 51064. [2021-12-15 10:05:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51064 states, 51063 states have (on average 1.029316726396804) internal successors, (52560), 51063 states have internal predecessors, (52560), 0 states have call successors, (0), 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 10:05:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51064 states to 51064 states and 52560 transitions. [2021-12-15 10:05:13,620 INFO L78 Accepts]: Start accepts. Automaton has 51064 states and 52560 transitions. Word has length 1560 [2021-12-15 10:05:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:05:13,620 INFO L470 AbstractCegarLoop]: Abstraction has 51064 states and 52560 transitions. [2021-12-15 10:05:13,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.8) internal successors, (949), 5 states have internal predecessors, (949), 0 states have call successors, (0), 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 10:05:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51064 states and 52560 transitions. [2021-12-15 10:05:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1565 [2021-12-15 10:05:13,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:05:13,655 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:13,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 10:05:13,656 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:05:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:05:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -204796691, now seen corresponding path program 1 times [2021-12-15 10:05:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:05:13,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714809458] [2021-12-15 10:05:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:13,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:05:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 1808 proven. 1013 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2021-12-15 10:05:14,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:05:14,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714809458] [2021-12-15 10:05:14,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714809458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:05:14,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008349127] [2021-12-15 10:05:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:14,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:05:14,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:05:14,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:05:14,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 10:05:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:05:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates...