./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.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 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:33:42,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:33:42,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:33:42,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:33:42,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:33:42,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:33:42,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:33:42,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:33:42,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:33:42,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:33:42,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:33:42,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:33:42,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:33:42,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:33:42,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:33:42,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:33:42,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:33:42,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:33:42,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:33:42,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:33:42,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:33:42,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:33:42,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:33:42,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:33:42,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:33:42,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:33:42,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:33:42,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:33:42,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:33:42,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:33:42,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:33:42,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:33:42,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:33:42,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:33:42,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:33:42,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:33:42,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:33:42,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:33:42,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:33:42,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:33:42,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:33:42,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:33:42,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:33:42,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:33:42,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:33:42,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:33:42,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:33:42,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:33:42,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:33:42,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:33:42,803 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:33:42,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:33:42,804 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:33:42,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:33:42,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:33:42,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:33:42,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:33:42,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:33:42,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:33:42,805 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:33:42,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:33:42,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:33:42,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:33:42,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:33:42,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:33:42,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:33:42,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:33:42,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:33:42,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:33:42,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:33:42,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:33:42,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:33:42,807 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:33:42,807 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:33:42,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:33:42,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 [2021-12-28 01:33:43,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:33:43,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:33:43,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:33:43,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:33:43,125 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:33:43,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-12-28 01:33:43,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1be91cad/9e1af515be4d4b2b828d4757deae7847/FLAG9ca668ea5 [2021-12-28 01:33:43,618 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:33:43,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-12-28 01:33:43,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1be91cad/9e1af515be4d4b2b828d4757deae7847/FLAG9ca668ea5 [2021-12-28 01:33:43,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1be91cad/9e1af515be4d4b2b828d4757deae7847 [2021-12-28 01:33:43,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:33:43,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:33:43,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:33:43,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:33:43,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:33:43,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:33:43" (1/1) ... [2021-12-28 01:33:43,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30da1d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:43, skipping insertion in model container [2021-12-28 01:33:43,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:33:43" (1/1) ... [2021-12-28 01:33:43,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:33:43,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:33:43,930 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/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-12-28 01:33:43,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:33:44,005 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:33:44,064 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/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-12-28 01:33:44,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:33:44,099 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:33:44,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44 WrapperNode [2021-12-28 01:33:44,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:33:44,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:33:44,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:33:44,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:33:44,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,201 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 843 [2021-12-28 01:33:44,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:33:44,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:33:44,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:33:44,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:33:44,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:33:44,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:33:44,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:33:44,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:33:44,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (1/1) ... [2021-12-28 01:33:44,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:33:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:33:44,304 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) [2021-12-28 01:33:44,325 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 [2021-12-28 01:33:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:33:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:33:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:33:44,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:33:44,467 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:33:44,468 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:33:44,983 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:33:44,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:33:44,989 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:33:44,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:33:44 BoogieIcfgContainer [2021-12-28 01:33:44,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:33:44,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:33:44,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:33:44,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:33:44,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:33:43" (1/3) ... [2021-12-28 01:33:44,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45777e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:33:44, skipping insertion in model container [2021-12-28 01:33:44,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:44" (2/3) ... [2021-12-28 01:33:44,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45777e15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:33:44, skipping insertion in model container [2021-12-28 01:33:44,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:33:44" (3/3) ... [2021-12-28 01:33:44,997 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-12-28 01:33:45,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:33:45,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:33:45,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:33:45,035 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 [2021-12-28 01:33:45,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:33:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 202 states, 200 states have (on average 1.765) internal successors, (353), 201 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 01:33:45,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:45,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:45,056 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2055920229, now seen corresponding path program 1 times [2021-12-28 01:33:45,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:45,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439511972] [2021-12-28 01:33:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:45,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:45,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439511972] [2021-12-28 01:33:45,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439511972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:45,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:45,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:45,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424419535] [2021-12-28 01:33:45,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:45,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:45,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:45,534 INFO L87 Difference]: Start difference. First operand has 202 states, 200 states have (on average 1.765) internal successors, (353), 201 states have internal predecessors, (353), 0 states have call successors, (0), 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 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:46,181 INFO L93 Difference]: Finished difference Result 1459 states and 2342 transitions. [2021-12-28 01:33:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:33:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-28 01:33:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:46,208 INFO L225 Difference]: With dead ends: 1459 [2021-12-28 01:33:46,208 INFO L226 Difference]: Without dead ends: 1333 [2021-12-28 01:33:46,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-28 01:33:46,215 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 2676 mSDsluCounter, 6172 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 7040 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:46,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2676 Valid, 7040 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:33:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-12-28 01:33:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 304. [2021-12-28 01:33:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.4422442244224423) internal successors, (437), 303 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 437 transitions. [2021-12-28 01:33:46,273 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 437 transitions. Word has length 108 [2021-12-28 01:33:46,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:46,274 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 437 transitions. [2021-12-28 01:33:46,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 437 transitions. [2021-12-28 01:33:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:46,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:46,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:46,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:33:46,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash -924120728, now seen corresponding path program 1 times [2021-12-28 01:33:46,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:46,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706911086] [2021-12-28 01:33:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:46,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:46,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706911086] [2021-12-28 01:33:46,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706911086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:46,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:46,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:46,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847508943] [2021-12-28 01:33:46,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:46,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:46,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:46,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:46,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:46,421 INFO L87 Difference]: Start difference. First operand 304 states and 437 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:46,779 INFO L93 Difference]: Finished difference Result 1560 states and 2419 transitions. [2021-12-28 01:33:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:46,784 INFO L225 Difference]: With dead ends: 1560 [2021-12-28 01:33:46,785 INFO L226 Difference]: Without dead ends: 1400 [2021-12-28 01:33:46,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:33:46,787 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 1946 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1946 SdHoareTripleChecker+Valid, 4018 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:46,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1946 Valid, 4018 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:33:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-12-28 01:33:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 483. [2021-12-28 01:33:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.495850622406639) internal successors, (721), 482 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 721 transitions. [2021-12-28 01:33:46,839 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 721 transitions. Word has length 110 [2021-12-28 01:33:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:46,839 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 721 transitions. [2021-12-28 01:33:46,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 721 transitions. [2021-12-28 01:33:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:46,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:46,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:33:46,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1292919580, now seen corresponding path program 1 times [2021-12-28 01:33:46,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:46,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717501092] [2021-12-28 01:33:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:46,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:46,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717501092] [2021-12-28 01:33:46,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717501092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:46,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:46,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:46,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103308677] [2021-12-28 01:33:46,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:46,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:46,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:46,939 INFO L87 Difference]: Start difference. First operand 483 states and 721 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:47,262 INFO L93 Difference]: Finished difference Result 1739 states and 2703 transitions. [2021-12-28 01:33:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:47,270 INFO L225 Difference]: With dead ends: 1739 [2021-12-28 01:33:47,270 INFO L226 Difference]: Without dead ends: 1579 [2021-12-28 01:33:47,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:33:47,276 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 1941 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1941 SdHoareTripleChecker+Valid, 3067 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:47,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1941 Valid, 3067 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-12-28 01:33:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 741. [2021-12-28 01:33:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.527027027027027) internal successors, (1130), 740 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1130 transitions. [2021-12-28 01:33:47,362 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1130 transitions. Word has length 110 [2021-12-28 01:33:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:47,363 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1130 transitions. [2021-12-28 01:33:47,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1130 transitions. [2021-12-28 01:33:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:47,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:47,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:47,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:33:47,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1295133060, now seen corresponding path program 1 times [2021-12-28 01:33:47,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:47,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840557587] [2021-12-28 01:33:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:47,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:47,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:47,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840557587] [2021-12-28 01:33:47,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840557587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:47,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:47,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:47,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184339630] [2021-12-28 01:33:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:47,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:47,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:47,488 INFO L87 Difference]: Start difference. First operand 741 states and 1130 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:47,904 INFO L93 Difference]: Finished difference Result 1913 states and 2979 transitions. [2021-12-28 01:33:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:47,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:47,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:47,910 INFO L225 Difference]: With dead ends: 1913 [2021-12-28 01:33:47,910 INFO L226 Difference]: Without dead ends: 1753 [2021-12-28 01:33:47,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:33:47,911 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 2145 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:47,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 2916 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:33:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-12-28 01:33:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 915. [2021-12-28 01:33:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 1.538293216630197) internal successors, (1406), 914 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1406 transitions. [2021-12-28 01:33:48,002 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1406 transitions. Word has length 110 [2021-12-28 01:33:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:48,002 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1406 transitions. [2021-12-28 01:33:48,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1406 transitions. [2021-12-28 01:33:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:48,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:48,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:48,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:33:48,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash 722932112, now seen corresponding path program 1 times [2021-12-28 01:33:48,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:48,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219050612] [2021-12-28 01:33:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:48,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:48,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:48,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219050612] [2021-12-28 01:33:48,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219050612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:48,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:48,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:48,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216795576] [2021-12-28 01:33:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:48,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:48,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:48,096 INFO L87 Difference]: Start difference. First operand 915 states and 1406 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:48,450 INFO L93 Difference]: Finished difference Result 2082 states and 3247 transitions. [2021-12-28 01:33:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:48,456 INFO L225 Difference]: With dead ends: 2082 [2021-12-28 01:33:48,456 INFO L226 Difference]: Without dead ends: 1922 [2021-12-28 01:33:48,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:33:48,457 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 2347 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2347 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:48,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2347 Valid, 2685 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-12-28 01:33:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1079. [2021-12-28 01:33:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 1.5454545454545454) internal successors, (1666), 1078 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1666 transitions. [2021-12-28 01:33:48,563 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1666 transitions. Word has length 110 [2021-12-28 01:33:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:48,563 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1666 transitions. [2021-12-28 01:33:48,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1666 transitions. [2021-12-28 01:33:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:48,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:48,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:48,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:33:48,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1525369156, now seen corresponding path program 1 times [2021-12-28 01:33:48,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:48,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525812272] [2021-12-28 01:33:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:48,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:48,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:48,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525812272] [2021-12-28 01:33:48,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525812272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:48,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:48,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:48,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451416367] [2021-12-28 01:33:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:48,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:48,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:48,665 INFO L87 Difference]: Start difference. First operand 1079 states and 1666 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:49,011 INFO L93 Difference]: Finished difference Result 2241 states and 3499 transitions. [2021-12-28 01:33:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:49,017 INFO L225 Difference]: With dead ends: 2241 [2021-12-28 01:33:49,017 INFO L226 Difference]: Without dead ends: 2081 [2021-12-28 01:33:49,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:33:49,020 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 2850 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2850 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:49,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2850 Valid, 2572 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-12-28 01:33:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1238. [2021-12-28 01:33:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 1.5505254648342766) internal successors, (1918), 1237 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1918 transitions. [2021-12-28 01:33:49,165 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1918 transitions. Word has length 110 [2021-12-28 01:33:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:49,166 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1918 transitions. [2021-12-28 01:33:49,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1918 transitions. [2021-12-28 01:33:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:49,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:49,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:49,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:33:49,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1186267839, now seen corresponding path program 1 times [2021-12-28 01:33:49,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:49,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368788356] [2021-12-28 01:33:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:49,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:49,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368788356] [2021-12-28 01:33:49,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368788356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:49,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:49,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:49,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721601767] [2021-12-28 01:33:49,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:49,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:49,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:49,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:49,408 INFO L87 Difference]: Start difference. First operand 1238 states and 1918 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:49,771 INFO L93 Difference]: Finished difference Result 2269 states and 3552 transitions. [2021-12-28 01:33:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:49,775 INFO L225 Difference]: With dead ends: 2269 [2021-12-28 01:33:49,775 INFO L226 Difference]: Without dead ends: 1240 [2021-12-28 01:33:49,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:33:49,779 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 677 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:49,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 1394 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-12-28 01:33:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1238. [2021-12-28 01:33:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 1.5448666127728374) internal successors, (1911), 1237 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1911 transitions. [2021-12-28 01:33:49,915 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1911 transitions. Word has length 110 [2021-12-28 01:33:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:49,916 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1911 transitions. [2021-12-28 01:33:49,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1911 transitions. [2021-12-28 01:33:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:49,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:49,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:49,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:33:49,918 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash 943143488, now seen corresponding path program 1 times [2021-12-28 01:33:49,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:49,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909051053] [2021-12-28 01:33:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:49,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:49,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909051053] [2021-12-28 01:33:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909051053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:49,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:49,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:49,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651544845] [2021-12-28 01:33:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:49,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:49,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:49,965 INFO L87 Difference]: Start difference. First operand 1238 states and 1911 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:50,216 INFO L93 Difference]: Finished difference Result 3212 states and 5022 transitions. [2021-12-28 01:33:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:50,222 INFO L225 Difference]: With dead ends: 3212 [2021-12-28 01:33:50,223 INFO L226 Difference]: Without dead ends: 2183 [2021-12-28 01:33:50,224 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 [2021-12-28 01:33:50,225 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 115 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:50,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 640 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-12-28 01:33:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 2181. [2021-12-28 01:33:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.5454128440366972) internal successors, (3369), 2180 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3369 transitions. [2021-12-28 01:33:50,441 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3369 transitions. Word has length 110 [2021-12-28 01:33:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:50,442 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3369 transitions. [2021-12-28 01:33:50,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3369 transitions. [2021-12-28 01:33:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:50,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:50,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:50,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:33:50,444 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2091479554, now seen corresponding path program 1 times [2021-12-28 01:33:50,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:50,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030882192] [2021-12-28 01:33:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:50,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:50,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030882192] [2021-12-28 01:33:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030882192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:50,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:50,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:50,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463362098] [2021-12-28 01:33:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:50,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:50,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:50,517 INFO L87 Difference]: Start difference. First operand 2181 states and 3369 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:51,138 INFO L93 Difference]: Finished difference Result 4357 states and 6769 transitions. [2021-12-28 01:33:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:51,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:51,151 INFO L225 Difference]: With dead ends: 4357 [2021-12-28 01:33:51,152 INFO L226 Difference]: Without dead ends: 4052 [2021-12-28 01:33:51,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:33:51,154 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 2152 mSDsluCounter, 2375 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 2863 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:51,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 2863 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-12-28 01:33:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2484. [2021-12-28 01:33:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 1.5477245267821185) internal successors, (3843), 2483 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3843 transitions. [2021-12-28 01:33:51,430 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3843 transitions. Word has length 110 [2021-12-28 01:33:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:51,430 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 3843 transitions. [2021-12-28 01:33:51,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3843 transitions. [2021-12-28 01:33:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:33:51,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:51,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:51,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:33:51,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1690423504, now seen corresponding path program 1 times [2021-12-28 01:33:51,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:51,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414312959] [2021-12-28 01:33:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:51,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:51,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414312959] [2021-12-28 01:33:51,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414312959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:51,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:51,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:33:51,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512972166] [2021-12-28 01:33:51,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:51,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:33:51,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:51,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:33:51,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:33:51,507 INFO L87 Difference]: Start difference. First operand 2484 states and 3843 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:52,209 INFO L93 Difference]: Finished difference Result 4666 states and 7252 transitions. [2021-12-28 01:33:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:33:52,210 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-28 01:33:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:52,222 INFO L225 Difference]: With dead ends: 4666 [2021-12-28 01:33:52,222 INFO L226 Difference]: Without dead ends: 4361 [2021-12-28 01:33:52,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:33:52,224 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 2200 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:52,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 3676 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-12-28 01:33:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 2798. [2021-12-28 01:33:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.5495173400071505) internal successors, (4334), 2797 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4334 transitions. [2021-12-28 01:33:52,570 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4334 transitions. Word has length 110 [2021-12-28 01:33:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:52,570 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 4334 transitions. [2021-12-28 01:33:52,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4334 transitions. [2021-12-28 01:33:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:33:52,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:52,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:52,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:33:52,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1882311825, now seen corresponding path program 1 times [2021-12-28 01:33:52,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:52,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745721193] [2021-12-28 01:33:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:52,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:52,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745721193] [2021-12-28 01:33:52,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745721193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:52,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:52,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:52,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050281283] [2021-12-28 01:33:52,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:52,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:52,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:52,629 INFO L87 Difference]: Start difference. First operand 2798 states and 4334 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 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) [2021-12-28 01:33:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:53,447 INFO L93 Difference]: Finished difference Result 8214 states and 12793 transitions. [2021-12-28 01:33:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:53,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 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 [2021-12-28 01:33:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:53,460 INFO L225 Difference]: With dead ends: 8214 [2021-12-28 01:33:53,460 INFO L226 Difference]: Without dead ends: 5473 [2021-12-28 01:33:53,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:53,463 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 1070 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:53,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 237 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:33:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-12-28 01:33:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 5471. [2021-12-28 01:33:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5504570383912248) internal successors, (8481), 5470 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8481 transitions. [2021-12-28 01:33:54,186 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8481 transitions. Word has length 111 [2021-12-28 01:33:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:54,187 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8481 transitions. [2021-12-28 01:33:54,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 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) [2021-12-28 01:33:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8481 transitions. [2021-12-28 01:33:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:33:54,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:54,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:54,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:33:54,189 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1093414131, now seen corresponding path program 1 times [2021-12-28 01:33:54,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:54,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997610242] [2021-12-28 01:33:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:54,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:54,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:54,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997610242] [2021-12-28 01:33:54,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997610242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:54,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:54,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:54,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787616398] [2021-12-28 01:33:54,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:54,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:54,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:54,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:54,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:54,239 INFO L87 Difference]: Start difference. First operand 5471 states and 8481 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:55,026 INFO L93 Difference]: Finished difference Result 10869 states and 16885 transitions. [2021-12-28 01:33:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-28 01:33:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:55,034 INFO L225 Difference]: With dead ends: 10869 [2021-12-28 01:33:55,034 INFO L226 Difference]: Without dead ends: 5471 [2021-12-28 01:33:55,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:55,039 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 690 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:55,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 181 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-12-28 01:33:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-12-28 01:33:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5378427787934186) internal successors, (8412), 5470 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8412 transitions. [2021-12-28 01:33:55,812 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8412 transitions. Word has length 112 [2021-12-28 01:33:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:55,812 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8412 transitions. [2021-12-28 01:33:55,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8412 transitions. [2021-12-28 01:33:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 01:33:55,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:55,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:55,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:33:55,814 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash 596896751, now seen corresponding path program 1 times [2021-12-28 01:33:55,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:55,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916699263] [2021-12-28 01:33:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:55,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:55,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916699263] [2021-12-28 01:33:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916699263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:55,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:55,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:55,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733954311] [2021-12-28 01:33:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:55,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:55,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:55,859 INFO L87 Difference]: Start difference. First operand 5471 states and 8412 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 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) [2021-12-28 01:33:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:56,667 INFO L93 Difference]: Finished difference Result 10861 states and 16738 transitions. [2021-12-28 01:33:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:56,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 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 113 [2021-12-28 01:33:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:56,676 INFO L225 Difference]: With dead ends: 10861 [2021-12-28 01:33:56,676 INFO L226 Difference]: Without dead ends: 5471 [2021-12-28 01:33:56,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:56,683 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 664 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:56,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 201 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-12-28 01:33:57,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-12-28 01:33:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5252285191956125) internal successors, (8343), 5470 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8343 transitions. [2021-12-28 01:33:57,398 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8343 transitions. Word has length 113 [2021-12-28 01:33:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:57,399 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8343 transitions. [2021-12-28 01:33:57,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 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) [2021-12-28 01:33:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8343 transitions. [2021-12-28 01:33:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-28 01:33:57,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:57,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:57,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:33:57,401 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash 914047091, now seen corresponding path program 1 times [2021-12-28 01:33:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:57,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564945574] [2021-12-28 01:33:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:57,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:57,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564945574] [2021-12-28 01:33:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564945574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:57,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:57,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:57,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079133448] [2021-12-28 01:33:57,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:57,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:57,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:57,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:57,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:57,461 INFO L87 Difference]: Start difference. First operand 5471 states and 8343 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:58,375 INFO L93 Difference]: Finished difference Result 10873 states and 16614 transitions. [2021-12-28 01:33:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-28 01:33:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:58,383 INFO L225 Difference]: With dead ends: 10873 [2021-12-28 01:33:58,383 INFO L226 Difference]: Without dead ends: 5471 [2021-12-28 01:33:58,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:58,389 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 689 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:58,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 173 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-12-28 01:33:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-12-28 01:33:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5126142595978063) internal successors, (8274), 5470 states have internal predecessors, (8274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8274 transitions. [2021-12-28 01:33:59,194 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8274 transitions. Word has length 114 [2021-12-28 01:33:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:59,194 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8274 transitions. [2021-12-28 01:33:59,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8274 transitions. [2021-12-28 01:33:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-28 01:33:59,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:59,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:59,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:33:59,197 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash -932538653, now seen corresponding path program 1 times [2021-12-28 01:33:59,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:59,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866360980] [2021-12-28 01:33:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:59,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:59,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866360980] [2021-12-28 01:33:59,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866360980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:59,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:59,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:59,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622839241] [2021-12-28 01:33:59,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:59,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:59,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:59,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:59,255 INFO L87 Difference]: Start difference. First operand 5471 states and 8274 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:00,097 INFO L93 Difference]: Finished difference Result 10881 states and 16486 transitions. [2021-12-28 01:34:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:34:00,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-12-28 01:34:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:00,106 INFO L225 Difference]: With dead ends: 10881 [2021-12-28 01:34:00,106 INFO L226 Difference]: Without dead ends: 5471 [2021-12-28 01:34:00,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:34:00,113 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 705 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:00,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 157 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:34:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-12-28 01:34:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-12-28 01:34:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5) internal successors, (8205), 5470 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8205 transitions. [2021-12-28 01:34:00,839 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8205 transitions. Word has length 115 [2021-12-28 01:34:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:00,840 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8205 transitions. [2021-12-28 01:34:00,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8205 transitions. [2021-12-28 01:34:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-28 01:34:00,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:00,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:00,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:34:00,842 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1866315149, now seen corresponding path program 1 times [2021-12-28 01:34:00,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:00,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453941339] [2021-12-28 01:34:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:00,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:00,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453941339] [2021-12-28 01:34:00,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453941339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:00,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:00,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:34:00,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092924572] [2021-12-28 01:34:00,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:00,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:34:00,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:00,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:34:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:34:00,883 INFO L87 Difference]: Start difference. First operand 5471 states and 8205 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:01,746 INFO L93 Difference]: Finished difference Result 10877 states and 16344 transitions. [2021-12-28 01:34:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:34:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-28 01:34:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:01,753 INFO L225 Difference]: With dead ends: 10877 [2021-12-28 01:34:01,753 INFO L226 Difference]: Without dead ends: 5471 [2021-12-28 01:34:01,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:34:01,760 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 687 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:01,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 165 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:34:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-12-28 01:34:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-12-28 01:34:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.4873857404021937) internal successors, (8136), 5470 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8136 transitions. [2021-12-28 01:34:02,703 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8136 transitions. Word has length 116 [2021-12-28 01:34:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:02,703 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8136 transitions. [2021-12-28 01:34:02,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8136 transitions. [2021-12-28 01:34:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-28 01:34:02,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:02,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:02,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:34:02,705 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1607436073, now seen corresponding path program 1 times [2021-12-28 01:34:02,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375725806] [2021-12-28 01:34:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:02,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:02,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375725806] [2021-12-28 01:34:02,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375725806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:02,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:02,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:34:02,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278714646] [2021-12-28 01:34:02,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:02,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:34:02,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:02,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:34:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:34:02,746 INFO L87 Difference]: Start difference. First operand 5471 states and 8136 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:03,619 INFO L93 Difference]: Finished difference Result 10865 states and 16194 transitions. [2021-12-28 01:34:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:34:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-12-28 01:34:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:03,626 INFO L225 Difference]: With dead ends: 10865 [2021-12-28 01:34:03,626 INFO L226 Difference]: Without dead ends: 5471 [2021-12-28 01:34:03,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:34:03,633 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 645 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:03,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 189 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:34:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-12-28 01:34:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-12-28 01:34:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.4747714808043875) internal successors, (8067), 5470 states have internal predecessors, (8067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8067 transitions. [2021-12-28 01:34:04,441 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8067 transitions. Word has length 117 [2021-12-28 01:34:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:04,442 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8067 transitions. [2021-12-28 01:34:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8067 transitions. [2021-12-28 01:34:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 01:34:04,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:04,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:04,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:34:04,444 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 154166167, now seen corresponding path program 1 times [2021-12-28 01:34:04,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372940768] [2021-12-28 01:34:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:04,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:04,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:04,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372940768] [2021-12-28 01:34:04,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372940768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:04,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:04,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:34:04,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505620178] [2021-12-28 01:34:04,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:04,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:34:04,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:34:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:34:04,501 INFO L87 Difference]: Start difference. First operand 5471 states and 8067 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:05,840 INFO L93 Difference]: Finished difference Result 9141 states and 13482 transitions. [2021-12-28 01:34:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:34:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-12-28 01:34:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:05,854 INFO L225 Difference]: With dead ends: 9141 [2021-12-28 01:34:05,854 INFO L226 Difference]: Without dead ends: 9139 [2021-12-28 01:34:05,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:34:05,857 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 228 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:05,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1063 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9139 states. [2021-12-28 01:34:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9139 to 5503. [2021-12-28 01:34:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 1.4687386404943656) internal successors, (8081), 5502 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 8081 transitions. [2021-12-28 01:34:06,778 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 8081 transitions. Word has length 118 [2021-12-28 01:34:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:06,778 INFO L470 AbstractCegarLoop]: Abstraction has 5503 states and 8081 transitions. [2021-12-28 01:34:06,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 8081 transitions. [2021-12-28 01:34:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 01:34:06,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:06,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:06,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:34:06,780 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1441850003, now seen corresponding path program 1 times [2021-12-28 01:34:06,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082590496] [2021-12-28 01:34:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:06,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:06,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:06,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082590496] [2021-12-28 01:34:06,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082590496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:06,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:06,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:34:06,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324031533] [2021-12-28 01:34:06,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:06,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:34:06,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:34:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:34:06,914 INFO L87 Difference]: Start difference. First operand 5503 states and 8081 transitions. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:09,330 INFO L93 Difference]: Finished difference Result 15972 states and 23502 transitions. [2021-12-28 01:34:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:34:09,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-12-28 01:34:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:09,343 INFO L225 Difference]: With dead ends: 15972 [2021-12-28 01:34:09,344 INFO L226 Difference]: Without dead ends: 10689 [2021-12-28 01:34:09,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:34:09,350 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1533 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:09,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 459 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:34:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-12-28 01:34:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 5503. [2021-12-28 01:34:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 1.4685568884042166) internal successors, (8080), 5502 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 8080 transitions. [2021-12-28 01:34:10,377 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 8080 transitions. Word has length 118 [2021-12-28 01:34:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:10,378 INFO L470 AbstractCegarLoop]: Abstraction has 5503 states and 8080 transitions. [2021-12-28 01:34:10,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 8080 transitions. [2021-12-28 01:34:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-28 01:34:10,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:10,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:10,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:34:10,380 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1402661961, now seen corresponding path program 1 times [2021-12-28 01:34:10,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585472290] [2021-12-28 01:34:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:10,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:10,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:10,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585472290] [2021-12-28 01:34:10,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585472290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:10,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:10,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 01:34:10,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33722327] [2021-12-28 01:34:10,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:10,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 01:34:10,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 01:34:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:34:10,616 INFO L87 Difference]: Start difference. First operand 5503 states and 8080 transitions. Second operand has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:15,749 INFO L93 Difference]: Finished difference Result 26409 states and 38317 transitions. [2021-12-28 01:34:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 01:34:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-28 01:34:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:15,774 INFO L225 Difference]: With dead ends: 26409 [2021-12-28 01:34:15,774 INFO L226 Difference]: Without dead ends: 21223 [2021-12-28 01:34:15,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-12-28 01:34:15,783 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 2715 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2715 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:15,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2715 Valid, 1127 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 01:34:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21223 states. [2021-12-28 01:34:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21223 to 5700. [2021-12-28 01:34:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 5699 states have (on average 1.4699070012282858) internal successors, (8377), 5699 states have internal predecessors, (8377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 8377 transitions. [2021-12-28 01:34:17,030 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 8377 transitions. Word has length 119 [2021-12-28 01:34:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:17,031 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 8377 transitions. [2021-12-28 01:34:17,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 8377 transitions. [2021-12-28 01:34:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-28 01:34:17,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:17,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:17,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 01:34:17,033 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1554016695, now seen corresponding path program 1 times [2021-12-28 01:34:17,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:17,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130126781] [2021-12-28 01:34:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:17,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:17,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:17,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130126781] [2021-12-28 01:34:17,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130126781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:17,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:17,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:34:17,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759991351] [2021-12-28 01:34:17,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:17,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:34:17,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:34:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:34:17,152 INFO L87 Difference]: Start difference. First operand 5700 states and 8377 transitions. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:22,041 INFO L93 Difference]: Finished difference Result 25909 states and 37797 transitions. [2021-12-28 01:34:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 01:34:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-28 01:34:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:22,067 INFO L225 Difference]: With dead ends: 25909 [2021-12-28 01:34:22,067 INFO L226 Difference]: Without dead ends: 20723 [2021-12-28 01:34:22,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-12-28 01:34:22,077 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1797 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:22,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1797 Valid, 595 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:34:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20723 states. [2021-12-28 01:34:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20723 to 5548. [2021-12-28 01:34:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5548 states, 5547 states have (on average 1.4674598882278709) internal successors, (8140), 5547 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5548 states to 5548 states and 8140 transitions. [2021-12-28 01:34:23,366 INFO L78 Accepts]: Start accepts. Automaton has 5548 states and 8140 transitions. Word has length 119 [2021-12-28 01:34:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:23,367 INFO L470 AbstractCegarLoop]: Abstraction has 5548 states and 8140 transitions. [2021-12-28 01:34:23,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5548 states and 8140 transitions. [2021-12-28 01:34:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-28 01:34:23,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:23,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:23,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 01:34:23,369 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1830382439, now seen corresponding path program 1 times [2021-12-28 01:34:23,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11553905] [2021-12-28 01:34:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:23,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:23,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:23,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11553905] [2021-12-28 01:34:23,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11553905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:23,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:23,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 01:34:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176387361] [2021-12-28 01:34:23,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 01:34:23,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 01:34:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:34:23,558 INFO L87 Difference]: Start difference. First operand 5548 states and 8140 transitions. Second operand has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:29,753 INFO L93 Difference]: Finished difference Result 27499 states and 40124 transitions. [2021-12-28 01:34:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 01:34:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-28 01:34:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:29,778 INFO L225 Difference]: With dead ends: 27499 [2021-12-28 01:34:29,778 INFO L226 Difference]: Without dead ends: 22224 [2021-12-28 01:34:29,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-12-28 01:34:29,786 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 2074 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2074 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:29,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2074 Valid, 1344 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 01:34:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22224 states. [2021-12-28 01:34:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22224 to 5620. [2021-12-28 01:34:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5620 states, 5619 states have (on average 1.4662751379248977) internal successors, (8239), 5619 states have internal predecessors, (8239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5620 states to 5620 states and 8239 transitions. [2021-12-28 01:34:31,224 INFO L78 Accepts]: Start accepts. Automaton has 5620 states and 8239 transitions. Word has length 119 [2021-12-28 01:34:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:31,224 INFO L470 AbstractCegarLoop]: Abstraction has 5620 states and 8239 transitions. [2021-12-28 01:34:31,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5620 states and 8239 transitions. [2021-12-28 01:34:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-28 01:34:31,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:31,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:31,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 01:34:31,226 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1616446271, now seen corresponding path program 1 times [2021-12-28 01:34:31,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:31,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808610098] [2021-12-28 01:34:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:31,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:31,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:31,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808610098] [2021-12-28 01:34:31,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808610098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:31,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:31,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:34:31,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803439273] [2021-12-28 01:34:31,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:31,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:34:31,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:31,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:34:31,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:34:31,357 INFO L87 Difference]: Start difference. First operand 5620 states and 8239 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:34,529 INFO L93 Difference]: Finished difference Result 16405 states and 24041 transitions. [2021-12-28 01:34:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:34:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-28 01:34:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:34,540 INFO L225 Difference]: With dead ends: 16405 [2021-12-28 01:34:34,540 INFO L226 Difference]: Without dead ends: 11112 [2021-12-28 01:34:34,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-28 01:34:34,546 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1281 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:34,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1281 Valid, 520 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:34:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11112 states. [2021-12-28 01:34:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11112 to 5548. [2021-12-28 01:34:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5548 states, 5547 states have (on average 1.4654768343248603) internal successors, (8129), 5547 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5548 states to 5548 states and 8129 transitions. [2021-12-28 01:34:35,963 INFO L78 Accepts]: Start accepts. Automaton has 5548 states and 8129 transitions. Word has length 120 [2021-12-28 01:34:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:35,963 INFO L470 AbstractCegarLoop]: Abstraction has 5548 states and 8129 transitions. [2021-12-28 01:34:35,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5548 states and 8129 transitions. [2021-12-28 01:34:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-28 01:34:35,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:35,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:35,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 01:34:35,965 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1819671787, now seen corresponding path program 1 times [2021-12-28 01:34:35,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155919577] [2021-12-28 01:34:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:35,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:36,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:36,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155919577] [2021-12-28 01:34:36,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155919577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:36,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:36,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:34:36,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14525099] [2021-12-28 01:34:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:36,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:34:36,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:34:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:34:36,086 INFO L87 Difference]: Start difference. First operand 5548 states and 8129 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:38,443 INFO L93 Difference]: Finished difference Result 11672 states and 17087 transitions. [2021-12-28 01:34:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:34:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-12-28 01:34:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:38,451 INFO L225 Difference]: With dead ends: 11672 [2021-12-28 01:34:38,451 INFO L226 Difference]: Without dead ends: 6289 [2021-12-28 01:34:38,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-28 01:34:38,454 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 904 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:38,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 752 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:34:38,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-12-28 01:34:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5548. [2021-12-28 01:34:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5548 states, 5547 states have (on average 1.464936001442221) internal successors, (8126), 5547 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5548 states to 5548 states and 8126 transitions. [2021-12-28 01:34:39,976 INFO L78 Accepts]: Start accepts. Automaton has 5548 states and 8126 transitions. Word has length 120 [2021-12-28 01:34:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:39,977 INFO L470 AbstractCegarLoop]: Abstraction has 5548 states and 8126 transitions. [2021-12-28 01:34:39,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5548 states and 8126 transitions. [2021-12-28 01:34:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-28 01:34:39,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:39,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:39,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 01:34:39,978 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1867438790, now seen corresponding path program 1 times [2021-12-28 01:34:39,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:39,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632872685] [2021-12-28 01:34:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:39,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:40,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632872685] [2021-12-28 01:34:40,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632872685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:40,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:40,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 01:34:40,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107821016] [2021-12-28 01:34:40,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:40,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 01:34:40,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 01:34:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:34:40,199 INFO L87 Difference]: Start difference. First operand 5548 states and 8126 transitions. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)