./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem17_label27.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 8f2d01fae317b054ddf6fc311dfbe1142cfd4012ffbce2b7f37ce8e1b21b188d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:00:55,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:00:55,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:00:55,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:00:55,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:00:55,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:00:55,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:00:55,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:00:55,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:00:55,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:00:55,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:00:55,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:00:55,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:00:55,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:00:55,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:00:55,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:00:55,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:00:55,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:00:55,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:00:55,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:00:55,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:00:55,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:00:55,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:00:55,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:00:55,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:00:55,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:00:55,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:00:55,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:00:55,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:00:55,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:00:55,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:00:55,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:00:55,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:00:55,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:00:55,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:00:55,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:00:55,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:00:55,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:00:55,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:00:55,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:00:55,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:00:55,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:00:55,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:00:55,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:00:55,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:00:55,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:00:55,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:00:55,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:00:55,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:00:55,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:00:55,796 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:00:55,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:00:55,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:00:55,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:00:55,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:00:55,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:00:55,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:00:55,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:00:55,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:00:55,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:00:55,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:00:55,798 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:00:55,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:00:55,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:00:55,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:00:55,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:00:55,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:00:55,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:00:55,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:00:55,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:00:55,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:00:55,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:00:55,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:00:55,800 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:00:55,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:00:55,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:00:55,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f2d01fae317b054ddf6fc311dfbe1142cfd4012ffbce2b7f37ce8e1b21b188d [2021-12-15 23:00:55,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:00:55,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:00:55,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:00:55,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:00:55,982 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:00:55,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label27.c [2021-12-15 23:00:56,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c90b9626/cac976ea57fe43638821da3ea7e90abd/FLAG3ec2dd6ce [2021-12-15 23:00:56,630 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:00:56,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label27.c [2021-12-15 23:00:56,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c90b9626/cac976ea57fe43638821da3ea7e90abd/FLAG3ec2dd6ce [2021-12-15 23:00:57,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c90b9626/cac976ea57fe43638821da3ea7e90abd [2021-12-15 23:00:57,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:00:57,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:00:57,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:00:57,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:00:57,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:00:57,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:57,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc00370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57, skipping insertion in model container [2021-12-15 23:00:57,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:57,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:00:57,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:00:57,343 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/Problem17_label27.c[6203,6216] [2021-12-15 23:00:57,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:00:57,660 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:00:57,674 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/Problem17_label27.c[6203,6216] [2021-12-15 23:00:57,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:00:57,957 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:00:57,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57 WrapperNode [2021-12-15 23:00:57,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:00:57,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:00:57,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:00:57,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:00:57,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:57,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,184 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 23:00:58,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:00:58,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:00:58,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:00:58,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:00:58,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:00:58,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:00:58,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:00:58,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:00:58,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (1/1) ... [2021-12-15 23:00:58,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:00:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:58,508 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 23:00:58,552 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 23:00:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:00:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:00:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:00:58,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:00:58,663 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:00:58,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:01:00,878 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:01:00,886 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:01:00,886 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:01:00,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:00 BoogieIcfgContainer [2021-12-15 23:01:00,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:01:00,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:01:00,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:01:00,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:01:00,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:00:57" (1/3) ... [2021-12-15 23:01:00,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ce3985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:00, skipping insertion in model container [2021-12-15 23:01:00,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:57" (2/3) ... [2021-12-15 23:01:00,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ce3985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:00, skipping insertion in model container [2021-12-15 23:01:00,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:00" (3/3) ... [2021-12-15 23:01:00,894 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label27.c [2021-12-15 23:01:00,897 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:01:00,897 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:01:00,929 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:01:00,934 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 23:01:00,935 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:01:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 23:01:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 23:01:00,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:00,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:00,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash 751578873, now seen corresponding path program 1 times [2021-12-15 23:01:00,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:00,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400755229] [2021-12-15 23:01:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:00,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:01,113 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 23:01:01,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:01,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400755229] [2021-12-15 23:01:01,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400755229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:01,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:01,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:01,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071556965] [2021-12-15 23:01:01,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:01,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:01,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:01,146 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 23:01:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:03,618 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2021-12-15 23:01:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-15 23:01:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:03,657 INFO L225 Difference]: With dead ends: 1680 [2021-12-15 23:01:03,657 INFO L226 Difference]: Without dead ends: 1011 [2021-12-15 23:01:03,661 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 23:01:03,663 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 540 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:03,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:01:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-12-15 23:01:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2021-12-15 23:01:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 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 23:01:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2021-12-15 23:01:03,743 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 41 [2021-12-15 23:01:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:03,743 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2021-12-15 23:01:03,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 23:01:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2021-12-15 23:01:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 23:01:03,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:03,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:03,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:01:03,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:03,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1125860323, now seen corresponding path program 1 times [2021-12-15 23:01:03,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:03,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075095262] [2021-12-15 23:01:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:03,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:03,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:03,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075095262] [2021-12-15 23:01:03,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075095262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:03,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:03,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:03,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596620653] [2021-12-15 23:01:03,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:03,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:03,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:03,820 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 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 23:01:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:05,688 INFO L93 Difference]: Finished difference Result 2871 states and 5025 transitions. [2021-12-15 23:01:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:05,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-15 23:01:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:05,695 INFO L225 Difference]: With dead ends: 2871 [2021-12-15 23:01:05,695 INFO L226 Difference]: Without dead ends: 1877 [2021-12-15 23:01:05,701 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 23:01:05,703 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:05,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 520 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:01:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-12-15 23:01:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1870. [2021-12-15 23:01:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4719101123595506) internal successors, (2751), 1869 states have internal predecessors, (2751), 0 states have call successors, (0), 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 23:01:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2751 transitions. [2021-12-15 23:01:05,773 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2751 transitions. Word has length 106 [2021-12-15 23:01:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:05,775 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2751 transitions. [2021-12-15 23:01:05,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 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 23:01:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2751 transitions. [2021-12-15 23:01:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 23:01:05,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:05,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:05,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:01:05,782 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:05,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash 253179212, now seen corresponding path program 1 times [2021-12-15 23:01:05,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676419064] [2021-12-15 23:01:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:05,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:05,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676419064] [2021-12-15 23:01:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676419064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:05,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:05,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095867196] [2021-12-15 23:01:05,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:05,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:05,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:05,869 INFO L87 Difference]: Start difference. First operand 1870 states and 2751 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 23:01:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:07,930 INFO L93 Difference]: Finished difference Result 5454 states and 8039 transitions. [2021-12-15 23:01:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-15 23:01:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:07,943 INFO L225 Difference]: With dead ends: 5454 [2021-12-15 23:01:07,944 INFO L226 Difference]: Without dead ends: 3586 [2021-12-15 23:01:07,946 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 23:01:07,954 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 453 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:07,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 914 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:01:07,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-12-15 23:01:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3583. [2021-12-15 23:01:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3355667225013959) internal successors, (4784), 3582 states have internal predecessors, (4784), 0 states have call successors, (0), 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 23:01:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4784 transitions. [2021-12-15 23:01:08,016 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4784 transitions. Word has length 111 [2021-12-15 23:01:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:08,017 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4784 transitions. [2021-12-15 23:01:08,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 23:01:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4784 transitions. [2021-12-15 23:01:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-15 23:01:08,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:08,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:08,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:01:08,021 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash -111791273, now seen corresponding path program 1 times [2021-12-15 23:01:08,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:08,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997706185] [2021-12-15 23:01:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:08,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:08,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997706185] [2021-12-15 23:01:08,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997706185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:08,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:08,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:08,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763774822] [2021-12-15 23:01:08,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:08,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:01:08,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:08,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:01:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:01:08,176 INFO L87 Difference]: Start difference. First operand 3583 states and 4784 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 23:01:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:10,243 INFO L93 Difference]: Finished difference Result 7618 states and 10086 transitions. [2021-12-15 23:01:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:01:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-15 23:01:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:10,268 INFO L225 Difference]: With dead ends: 7618 [2021-12-15 23:01:10,268 INFO L226 Difference]: Without dead ends: 4037 [2021-12-15 23:01:10,281 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 23:01:10,287 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:10,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:01:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-15 23:01:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-15 23:01:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3014724232592962) internal successors, (5215), 4007 states have internal predecessors, (5215), 0 states have call successors, (0), 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 23:01:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5215 transitions. [2021-12-15 23:01:10,383 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5215 transitions. Word has length 152 [2021-12-15 23:01:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:10,399 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5215 transitions. [2021-12-15 23:01:10,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 23:01:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5215 transitions. [2021-12-15 23:01:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-15 23:01:10,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:10,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:10,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:01:10,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash 148483316, now seen corresponding path program 1 times [2021-12-15 23:01:10,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:10,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479243293] [2021-12-15 23:01:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:10,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 23:01:10,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479243293] [2021-12-15 23:01:10,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479243293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:10,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:10,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:10,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488985302] [2021-12-15 23:01:10,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:10,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:10,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:10,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:10,469 INFO L87 Difference]: Start difference. First operand 4008 states and 5215 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 23:01:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:11,895 INFO L93 Difference]: Finished difference Result 10996 states and 14539 transitions. [2021-12-15 23:01:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 23:01:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:11,925 INFO L225 Difference]: With dead ends: 10996 [2021-12-15 23:01:11,925 INFO L226 Difference]: Without dead ends: 5711 [2021-12-15 23:01:11,943 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 23:01:11,944 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:11,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:01:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-15 23:01:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4434. [2021-12-15 23:01:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4433 states have (on average 1.2091134671779833) internal successors, (5360), 4433 states have internal predecessors, (5360), 0 states have call successors, (0), 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 23:01:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 5360 transitions. [2021-12-15 23:01:12,055 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 5360 transitions. Word has length 180 [2021-12-15 23:01:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:12,056 INFO L470 AbstractCegarLoop]: Abstraction has 4434 states and 5360 transitions. [2021-12-15 23:01:12,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 23:01:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 5360 transitions. [2021-12-15 23:01:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-15 23:01:12,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:12,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:01:12,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:01:12,061 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1925292906, now seen corresponding path program 1 times [2021-12-15 23:01:12,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:12,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179963190] [2021-12-15 23:01:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:12,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:12,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179963190] [2021-12-15 23:01:12,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179963190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:12,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:12,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:12,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407812400] [2021-12-15 23:01:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:12,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:12,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:12,201 INFO L87 Difference]: Start difference. First operand 4434 states and 5360 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 23:01:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:13,879 INFO L93 Difference]: Finished difference Result 11414 states and 14015 transitions. [2021-12-15 23:01:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2021-12-15 23:01:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:13,896 INFO L225 Difference]: With dead ends: 11414 [2021-12-15 23:01:13,897 INFO L226 Difference]: Without dead ends: 6982 [2021-12-15 23:01:13,901 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 23:01:13,903 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:13,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:01:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2021-12-15 23:01:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6982. [2021-12-15 23:01:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 1.1834980661796304) internal successors, (8262), 6981 states have internal predecessors, (8262), 0 states have call successors, (0), 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 23:01:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 8262 transitions. [2021-12-15 23:01:14,073 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 8262 transitions. Word has length 193 [2021-12-15 23:01:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:14,073 INFO L470 AbstractCegarLoop]: Abstraction has 6982 states and 8262 transitions. [2021-12-15 23:01:14,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 23:01:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 8262 transitions. [2021-12-15 23:01:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-15 23:01:14,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:14,076 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:14,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:01:14,076 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash 18373913, now seen corresponding path program 1 times [2021-12-15 23:01:14,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:14,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215008825] [2021-12-15 23:01:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:14,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 23:01:14,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215008825] [2021-12-15 23:01:14,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215008825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:14,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:14,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:14,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366969340] [2021-12-15 23:01:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:14,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:14,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:14,215 INFO L87 Difference]: Start difference. First operand 6982 states and 8262 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:01:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:15,752 INFO L93 Difference]: Finished difference Result 17788 states and 21273 transitions. [2021-12-15 23:01:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 273 [2021-12-15 23:01:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:15,783 INFO L225 Difference]: With dead ends: 17788 [2021-12-15 23:01:15,783 INFO L226 Difference]: Without dead ends: 9958 [2021-12-15 23:01:15,793 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 23:01:15,793 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 384 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:15,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 858 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:01:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9958 states. [2021-12-15 23:01:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9958 to 9958. [2021-12-15 23:01:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 1.1449231696294064) internal successors, (11400), 9957 states have internal predecessors, (11400), 0 states have call successors, (0), 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 23:01:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 11400 transitions. [2021-12-15 23:01:15,972 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 11400 transitions. Word has length 273 [2021-12-15 23:01:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:15,973 INFO L470 AbstractCegarLoop]: Abstraction has 9958 states and 11400 transitions. [2021-12-15 23:01:15,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 23:01:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 11400 transitions. [2021-12-15 23:01:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-15 23:01:15,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:15,977 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 23:01:15,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:01:15,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1552604812, now seen corresponding path program 1 times [2021-12-15 23:01:15,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:15,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029053576] [2021-12-15 23:01:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:15,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 23:01:16,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:16,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029053576] [2021-12-15 23:01:16,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029053576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:16,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:16,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:16,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135035171] [2021-12-15 23:01:16,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:16,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:16,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:16,087 INFO L87 Difference]: Start difference. First operand 9958 states and 11400 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:17,914 INFO L93 Difference]: Finished difference Result 25024 states and 28867 transitions. [2021-12-15 23:01:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:17,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2021-12-15 23:01:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:17,943 INFO L225 Difference]: With dead ends: 25024 [2021-12-15 23:01:17,943 INFO L226 Difference]: Without dead ends: 14184 [2021-12-15 23:01:17,953 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 23:01:17,954 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 509 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:17,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 644 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:01:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14184 states. [2021-12-15 23:01:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14184 to 13326. [2021-12-15 23:01:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13325 states have (on average 1.1366604127579738) internal successors, (15146), 13325 states have internal predecessors, (15146), 0 states have call successors, (0), 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 23:01:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 15146 transitions. [2021-12-15 23:01:18,093 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 15146 transitions. Word has length 313 [2021-12-15 23:01:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:18,094 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 15146 transitions. [2021-12-15 23:01:18,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 15146 transitions. [2021-12-15 23:01:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-15 23:01:18,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:18,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:18,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:01:18,102 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 649706724, now seen corresponding path program 1 times [2021-12-15 23:01:18,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:18,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138001334] [2021-12-15 23:01:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:18,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:01:18,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:18,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138001334] [2021-12-15 23:01:18,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138001334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:18,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:18,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:18,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832211179] [2021-12-15 23:01:18,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:18,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:01:18,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:01:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:01:18,295 INFO L87 Difference]: Start difference. First operand 13326 states and 15146 transitions. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 23:01:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:20,483 INFO L93 Difference]: Finished difference Result 31362 states and 35698 transitions. [2021-12-15 23:01:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:01:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 380 [2021-12-15 23:01:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:20,508 INFO L225 Difference]: With dead ends: 31362 [2021-12-15 23:01:20,509 INFO L226 Difference]: Without dead ends: 17613 [2021-12-15 23:01:20,521 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 23:01:20,521 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 614 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:20,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 179 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 23:01:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17613 states. [2021-12-15 23:01:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17613 to 17608. [2021-12-15 23:01:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17608 states, 17607 states have (on average 1.1423865508036577) internal successors, (20114), 17607 states have internal predecessors, (20114), 0 states have call successors, (0), 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 23:01:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17608 states to 17608 states and 20114 transitions. [2021-12-15 23:01:20,687 INFO L78 Accepts]: Start accepts. Automaton has 17608 states and 20114 transitions. Word has length 380 [2021-12-15 23:01:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:20,688 INFO L470 AbstractCegarLoop]: Abstraction has 17608 states and 20114 transitions. [2021-12-15 23:01:20,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 23:01:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 17608 states and 20114 transitions. [2021-12-15 23:01:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-12-15 23:01:20,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:20,700 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:20,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:01:20,701 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1478748535, now seen corresponding path program 1 times [2021-12-15 23:01:20,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:20,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119866781] [2021-12-15 23:01:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:20,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 23:01:20,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119866781] [2021-12-15 23:01:20,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119866781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:20,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:20,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:20,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466347129] [2021-12-15 23:01:20,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:20,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:20,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:20,831 INFO L87 Difference]: Start difference. First operand 17608 states and 20114 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:01:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:22,443 INFO L93 Difference]: Finished difference Result 45865 states and 52464 transitions. [2021-12-15 23:01:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 483 [2021-12-15 23:01:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:22,475 INFO L225 Difference]: With dead ends: 45865 [2021-12-15 23:01:22,475 INFO L226 Difference]: Without dead ends: 28259 [2021-12-15 23:01:22,486 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 23:01:22,487 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 490 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:22,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 248 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:01:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28259 states. [2021-12-15 23:01:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28259 to 28242. [2021-12-15 23:01:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28242 states, 28241 states have (on average 1.132006656988067) internal successors, (31969), 28241 states have internal predecessors, (31969), 0 states have call successors, (0), 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 23:01:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28242 states to 28242 states and 31969 transitions. [2021-12-15 23:01:22,758 INFO L78 Accepts]: Start accepts. Automaton has 28242 states and 31969 transitions. Word has length 483 [2021-12-15 23:01:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:22,759 INFO L470 AbstractCegarLoop]: Abstraction has 28242 states and 31969 transitions. [2021-12-15 23:01:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 23:01:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28242 states and 31969 transitions. [2021-12-15 23:01:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-15 23:01:22,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:22,775 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:22,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:01:22,776 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1189591930, now seen corresponding path program 1 times [2021-12-15 23:01:22,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:22,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521490195] [2021-12-15 23:01:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:22,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-15 23:01:22,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:22,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521490195] [2021-12-15 23:01:22,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521490195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:22,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:22,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:22,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397290800] [2021-12-15 23:01:22,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:22,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:22,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:22,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:22,897 INFO L87 Difference]: Start difference. First operand 28242 states and 31969 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 23:01:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:24,549 INFO L93 Difference]: Finished difference Result 62013 states and 70477 transitions. [2021-12-15 23:01:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:24,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 537 [2021-12-15 23:01:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:24,619 INFO L225 Difference]: With dead ends: 62013 [2021-12-15 23:01:24,619 INFO L226 Difference]: Without dead ends: 34198 [2021-12-15 23:01:24,628 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 23:01:24,629 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 486 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:24,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 696 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:01:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34198 states. [2021-12-15 23:01:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34198 to 34194. [2021-12-15 23:01:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 1.126926563916591) internal successors, (38533), 34193 states have internal predecessors, (38533), 0 states have call successors, (0), 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 23:01:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 38533 transitions. [2021-12-15 23:01:25,326 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 38533 transitions. Word has length 537 [2021-12-15 23:01:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:25,326 INFO L470 AbstractCegarLoop]: Abstraction has 34194 states and 38533 transitions. [2021-12-15 23:01:25,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 23:01:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 38533 transitions. [2021-12-15 23:01:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2021-12-15 23:01:25,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:25,380 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 23:01:25,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 23:01:25,380 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1276921054, now seen corresponding path program 1 times [2021-12-15 23:01:25,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:25,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880600944] [2021-12-15 23:01:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:25,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 119 proven. 36 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-12-15 23:01:25,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880600944] [2021-12-15 23:01:25,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880600944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:25,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473322926] [2021-12-15 23:01:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:25,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:25,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:25,709 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 23:01:25,711 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 23:01:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:25,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:01:25,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:01:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-12-15 23:01:27,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:01:27,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473322926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:27,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:01:27,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 23:01:27,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232594209] [2021-12-15 23:01:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:27,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:27,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:01:27,010 INFO L87 Difference]: Start difference. First operand 34194 states and 38533 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:28,791 INFO L93 Difference]: Finished difference Result 76452 states and 86098 transitions. [2021-12-15 23:01:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 626 [2021-12-15 23:01:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:28,892 INFO L225 Difference]: With dead ends: 76452 [2021-12-15 23:01:28,907 INFO L226 Difference]: Without dead ends: 42684 [2021-12-15 23:01:28,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:01:28,967 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 404 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:28,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 353 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:01:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42684 states. [2021-12-15 23:01:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42684 to 37564. [2021-12-15 23:01:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37564 states, 37563 states have (on average 1.1147139472353114) internal successors, (41872), 37563 states have internal predecessors, (41872), 0 states have call successors, (0), 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 23:01:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37564 states to 37564 states and 41872 transitions. [2021-12-15 23:01:29,532 INFO L78 Accepts]: Start accepts. Automaton has 37564 states and 41872 transitions. Word has length 626 [2021-12-15 23:01:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:29,533 INFO L470 AbstractCegarLoop]: Abstraction has 37564 states and 41872 transitions. [2021-12-15 23:01:29,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:01:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 37564 states and 41872 transitions. [2021-12-15 23:01:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-12-15 23:01:29,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:29,639 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:29,658 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 23:01:29,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 23:01:29,854 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash -476294953, now seen corresponding path program 1 times [2021-12-15 23:01:29,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:29,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144942678] [2021-12-15 23:01:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:29,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 483 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 23:01:30,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144942678] [2021-12-15 23:01:30,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144942678] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006395311] [2021-12-15 23:01:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:30,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:30,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:30,400 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 23:01:30,448 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 23:01:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 23:01:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:01:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 483 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 23:01:31,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:01:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 483 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 23:01:33,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006395311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:01:33,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:01:33,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-15 23:01:33,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141595134] [2021-12-15 23:01:33,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:01:33,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 23:01:33,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 23:01:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:33,112 INFO L87 Difference]: Start difference. First operand 37564 states and 41872 transitions. Second operand has 6 states, 6 states have (on average 235.16666666666666) internal successors, (1411), 6 states have internal predecessors, (1411), 0 states have call successors, (0), 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 23:01:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:36,250 INFO L93 Difference]: Finished difference Result 84054 states and 94093 transitions. [2021-12-15 23:01:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:01:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 235.16666666666666) internal successors, (1411), 6 states have internal predecessors, (1411), 0 states have call successors, (0), 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 848 [2021-12-15 23:01:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:36,302 INFO L225 Difference]: With dead ends: 84054 [2021-12-15 23:01:36,303 INFO L226 Difference]: Without dead ends: 46067 [2021-12-15 23:01:36,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1698 GetRequests, 1693 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:01:36,333 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 713 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 3426 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 3426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:36,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 786 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 3426 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 23:01:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46067 states. [2021-12-15 23:01:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46067 to 43078. [2021-12-15 23:01:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43078 states, 43077 states have (on average 1.097499825893168) internal successors, (47277), 43077 states have internal predecessors, (47277), 0 states have call successors, (0), 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 23:01:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43078 states to 43078 states and 47277 transitions. [2021-12-15 23:01:37,027 INFO L78 Accepts]: Start accepts. Automaton has 43078 states and 47277 transitions. Word has length 848 [2021-12-15 23:01:37,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:37,027 INFO L470 AbstractCegarLoop]: Abstraction has 43078 states and 47277 transitions. [2021-12-15 23:01:37,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 235.16666666666666) internal successors, (1411), 6 states have internal predecessors, (1411), 0 states have call successors, (0), 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 23:01:37,028 INFO L276 IsEmpty]: Start isEmpty. Operand 43078 states and 47277 transitions. [2021-12-15 23:01:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2021-12-15 23:01:37,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:37,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:37,087 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 23:01:37,279 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,SelfDestructingSolverStorable12 [2021-12-15 23:01:37,282 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash -697298324, now seen corresponding path program 1 times [2021-12-15 23:01:37,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:37,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23692407] [2021-12-15 23:01:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:37,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 1044 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-15 23:01:37,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:37,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23692407] [2021-12-15 23:01:37,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23692407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:37,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:37,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:37,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983816276] [2021-12-15 23:01:37,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:37,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:37,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:37,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:37,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:37,654 INFO L87 Difference]: Start difference. First operand 43078 states and 47277 transitions. Second operand has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 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 23:01:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:39,245 INFO L93 Difference]: Finished difference Result 93823 states and 103441 transitions. [2021-12-15 23:01:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 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 903 [2021-12-15 23:01:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:39,303 INFO L225 Difference]: With dead ends: 93823 [2021-12-15 23:01:39,304 INFO L226 Difference]: Without dead ends: 50319 [2021-12-15 23:01:39,331 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 23:01:39,332 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 197 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:39,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 619 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:01:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50319 states. [2021-12-15 23:01:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50319 to 49463. [2021-12-15 23:01:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49463 states, 49462 states have (on average 1.102846629735959) internal successors, (54549), 49462 states have internal predecessors, (54549), 0 states have call successors, (0), 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 23:01:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49463 states to 49463 states and 54549 transitions. [2021-12-15 23:01:40,061 INFO L78 Accepts]: Start accepts. Automaton has 49463 states and 54549 transitions. Word has length 903 [2021-12-15 23:01:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:40,061 INFO L470 AbstractCegarLoop]: Abstraction has 49463 states and 54549 transitions. [2021-12-15 23:01:40,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 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 23:01:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 49463 states and 54549 transitions. [2021-12-15 23:01:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2021-12-15 23:01:40,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:40,104 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:01:40,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:01:40,105 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1116733157, now seen corresponding path program 1 times [2021-12-15 23:01:40,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:40,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953701274] [2021-12-15 23:01:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:40,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-12-15 23:01:40,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953701274] [2021-12-15 23:01:40,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953701274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:40,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:40,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:01:40,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951351930] [2021-12-15 23:01:40,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:40,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:40,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:40,477 INFO L87 Difference]: Start difference. First operand 49463 states and 54549 transitions. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 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 23:01:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:41,402 INFO L93 Difference]: Finished difference Result 95076 states and 104519 transitions. [2021-12-15 23:01:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 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 916 [2021-12-15 23:01:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:41,553 INFO L225 Difference]: With dead ends: 95076 [2021-12-15 23:01:41,553 INFO L226 Difference]: Without dead ends: 45614 [2021-12-15 23:01:41,576 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 23:01:41,577 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 350 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:41,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 71 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 23:01:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45614 states. [2021-12-15 23:01:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45614 to 45610. [2021-12-15 23:01:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45610 states, 45609 states have (on average 1.0952443596658554) internal successors, (49953), 45609 states have internal predecessors, (49953), 0 states have call successors, (0), 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 23:01:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45610 states to 45610 states and 49953 transitions. [2021-12-15 23:01:42,051 INFO L78 Accepts]: Start accepts. Automaton has 45610 states and 49953 transitions. Word has length 916 [2021-12-15 23:01:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:42,051 INFO L470 AbstractCegarLoop]: Abstraction has 45610 states and 49953 transitions. [2021-12-15 23:01:42,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 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 23:01:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 45610 states and 49953 transitions. [2021-12-15 23:01:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2021-12-15 23:01:42,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:42,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:01:42,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 23:01:42,090 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -402251976, now seen corresponding path program 1 times [2021-12-15 23:01:42,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:42,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320760121] [2021-12-15 23:01:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:42,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 768 proven. 82 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-12-15 23:01:42,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320760121] [2021-12-15 23:01:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320760121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303032390] [2021-12-15 23:01:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:42,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:42,364 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 23:01:42,389 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 23:01:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 23:01:42,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:01:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 1176 proven. 246 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 23:01:44,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:01:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 1422 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 23:01:45,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303032390] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:45,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:01:45,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 5] total 11 [2021-12-15 23:01:45,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69768443] [2021-12-15 23:01:45,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:45,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 23:01:45,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 23:01:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-15 23:01:45,724 INFO L87 Difference]: Start difference. First operand 45610 states and 49953 transitions. Second operand has 6 states, 6 states have (on average 153.5) internal successors, (921), 5 states have internal predecessors, (921), 0 states have call successors, (0), 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 23:01:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:47,987 INFO L93 Difference]: Finished difference Result 97588 states and 107087 transitions. [2021-12-15 23:01:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:01:47,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 153.5) internal successors, (921), 5 states have internal predecessors, (921), 0 states have call successors, (0), 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 959 [2021-12-15 23:01:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:48,049 INFO L225 Difference]: With dead ends: 97588 [2021-12-15 23:01:48,050 INFO L226 Difference]: Without dead ends: 51555 [2021-12-15 23:01:48,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1919 GetRequests, 1909 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-15 23:01:48,082 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 979 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 3117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:48,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 120 Invalid, 3117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:01:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51555 states. [2021-12-15 23:01:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51555 to 42625. [2021-12-15 23:01:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42625 states, 42624 states have (on average 1.0909581456456456) internal successors, (46501), 42624 states have internal predecessors, (46501), 0 states have call successors, (0), 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 23:01:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42625 states to 42625 states and 46501 transitions. [2021-12-15 23:01:48,752 INFO L78 Accepts]: Start accepts. Automaton has 42625 states and 46501 transitions. Word has length 959 [2021-12-15 23:01:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:48,752 INFO L470 AbstractCegarLoop]: Abstraction has 42625 states and 46501 transitions. [2021-12-15 23:01:48,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.5) internal successors, (921), 5 states have internal predecessors, (921), 0 states have call successors, (0), 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 23:01:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 42625 states and 46501 transitions. [2021-12-15 23:01:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2021-12-15 23:01:48,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:48,790 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:48,809 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 23:01:49,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:49,007 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1807025042, now seen corresponding path program 1 times [2021-12-15 23:01:49,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406842063] [2021-12-15 23:01:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:49,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 1300 proven. 0 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-12-15 23:01:49,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:49,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406842063] [2021-12-15 23:01:49,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406842063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:49,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:49,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:01:49,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862740601] [2021-12-15 23:01:49,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:49,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:01:49,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:01:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:01:49,497 INFO L87 Difference]: Start difference. First operand 42625 states and 46501 transitions. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 23:01:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:51,465 INFO L93 Difference]: Finished difference Result 103148 states and 112829 transitions. [2021-12-15 23:01:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:01:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 1023 [2021-12-15 23:01:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:51,527 INFO L225 Difference]: With dead ends: 103148 [2021-12-15 23:01:51,527 INFO L226 Difference]: Without dead ends: 60950 [2021-12-15 23:01:51,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 23:01:51,643 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 750 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:51,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 118 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:01:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60950 states. [2021-12-15 23:01:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60950 to 60094. [2021-12-15 23:01:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60094 states, 60093 states have (on average 1.0886292912652056) internal successors, (65419), 60093 states have internal predecessors, (65419), 0 states have call successors, (0), 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 23:01:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60094 states to 60094 states and 65419 transitions. [2021-12-15 23:01:52,335 INFO L78 Accepts]: Start accepts. Automaton has 60094 states and 65419 transitions. Word has length 1023 [2021-12-15 23:01:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:52,336 INFO L470 AbstractCegarLoop]: Abstraction has 60094 states and 65419 transitions. [2021-12-15 23:01:52,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 23:01:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 60094 states and 65419 transitions. [2021-12-15 23:01:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2021-12-15 23:01:52,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:52,392 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:01:52,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 23:01:52,392 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1946820070, now seen corresponding path program 1 times [2021-12-15 23:01:52,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:52,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65835444] [2021-12-15 23:01:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:52,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1447 backedges. 1097 proven. 0 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-12-15 23:01:52,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:52,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65835444] [2021-12-15 23:01:52,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65835444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:01:52,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:01:52,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:01:52,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649238551] [2021-12-15 23:01:52,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:01:52,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:01:52,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:01:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:01:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:01:52,899 INFO L87 Difference]: Start difference. First operand 60094 states and 65419 transitions. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 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 23:01:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:01:54,088 INFO L93 Difference]: Finished difference Result 121890 states and 132631 transitions. [2021-12-15 23:01:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:01:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 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 1051 [2021-12-15 23:01:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:01:54,155 INFO L225 Difference]: With dead ends: 121890 [2021-12-15 23:01:54,155 INFO L226 Difference]: Without dead ends: 62223 [2021-12-15 23:01:54,188 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 23:01:54,188 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 113 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:01:54,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 722 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 23:01:54,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62223 states. [2021-12-15 23:01:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62223 to 61795. [2021-12-15 23:01:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61795 states, 61794 states have (on average 1.0858821244781047) internal successors, (67101), 61794 states have internal predecessors, (67101), 0 states have call successors, (0), 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 23:01:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61795 states to 61795 states and 67101 transitions. [2021-12-15 23:01:55,131 INFO L78 Accepts]: Start accepts. Automaton has 61795 states and 67101 transitions. Word has length 1051 [2021-12-15 23:01:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:01:55,132 INFO L470 AbstractCegarLoop]: Abstraction has 61795 states and 67101 transitions. [2021-12-15 23:01:55,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 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 23:01:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 61795 states and 67101 transitions. [2021-12-15 23:01:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1057 [2021-12-15 23:01:55,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:01:55,202 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:01:55,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 23:01:55,202 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:01:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:01:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1195057966, now seen corresponding path program 1 times [2021-12-15 23:01:55,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:01:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214938690] [2021-12-15 23:01:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:01:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 314 proven. 555 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-12-15 23:01:56,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:01:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214938690] [2021-12-15 23:01:56,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214938690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:01:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686047255] [2021-12-15 23:01:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:01:56,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:01:56,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:01:56,043 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 23:01:56,081 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 23:01:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:01:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 23:01:56,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:01:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 609 proven. 502 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-12-15 23:01:58,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:02:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 609 proven. 502 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-12-15 23:02:00,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686047255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:02:00,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:02:00,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2021-12-15 23:02:00,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29568431] [2021-12-15 23:02:00,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:02:00,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 23:02:00,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 23:02:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 23:02:00,514 INFO L87 Difference]: Start difference. First operand 61795 states and 67101 transitions. Second operand has 8 states, 8 states have (on average 145.375) internal successors, (1163), 8 states have internal predecessors, (1163), 0 states have call successors, (0), 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 23:02:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:02:03,619 INFO L93 Difference]: Finished difference Result 124502 states and 135168 transitions. [2021-12-15 23:02:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 23:02:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 145.375) internal successors, (1163), 8 states have internal predecessors, (1163), 0 states have call successors, (0), 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 1056 [2021-12-15 23:02:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:02:03,705 INFO L225 Difference]: With dead ends: 124502 [2021-12-15 23:02:03,706 INFO L226 Difference]: Without dead ends: 62224 [2021-12-15 23:02:03,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2118 GetRequests, 2110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-15 23:02:03,735 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 941 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4258 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 4543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 4258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:02:03,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 152 Invalid, 4543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 4258 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 23:02:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62224 states. [2021-12-15 23:02:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62224 to 61370. [2021-12-15 23:02:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61370 states, 61369 states have (on average 1.0863302318760286) internal successors, (66667), 61369 states have internal predecessors, (66667), 0 states have call successors, (0), 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 23:02:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61370 states to 61370 states and 66667 transitions. [2021-12-15 23:02:04,622 INFO L78 Accepts]: Start accepts. Automaton has 61370 states and 66667 transitions. Word has length 1056 [2021-12-15 23:02:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:02:04,624 INFO L470 AbstractCegarLoop]: Abstraction has 61370 states and 66667 transitions. [2021-12-15 23:02:04,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 145.375) internal successors, (1163), 8 states have internal predecessors, (1163), 0 states have call successors, (0), 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 23:02:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 61370 states and 66667 transitions. [2021-12-15 23:02:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2021-12-15 23:02:04,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:02:04,695 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:02:04,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 23:02:04,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:02:04,913 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:02:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:02:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash -984601988, now seen corresponding path program 1 times [2021-12-15 23:02:04,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:02:04,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654151563] [2021-12-15 23:02:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:02:04,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:02:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:02:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 1601 proven. 0 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-12-15 23:02:05,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:02:05,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654151563] [2021-12-15 23:02:05,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654151563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:02:05,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:02:05,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:02:05,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260541453] [2021-12-15 23:02:05,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:02:05,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:02:05,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:02:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:02:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:02:05,251 INFO L87 Difference]: Start difference. First operand 61370 states and 66667 transitions. Second operand has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)