./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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.6.1.ufo.UNBOUNDED.pals.c.p+lhb-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 06f1e7cb4ad4b39445b3c30d820384fbedafa8e52cac3d3c0cb4d178fb229699 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:51:31,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:51:31,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:51:31,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:51:31,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:51:31,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:51:31,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:51:31,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:51:31,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:51:31,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:51:31,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:51:31,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:51:31,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:51:31,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:51:31,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:51:31,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:51:31,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:51:31,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:51:31,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:51:31,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:51:31,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:51:31,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:51:31,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:51:31,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:51:31,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:51:31,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:51:31,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:51:31,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:51:31,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:51:31,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:51:31,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:51:31,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:51:31,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:51:31,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:51:31,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:51:31,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:51:31,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:51:31,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:51:31,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:51:31,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:51:31,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:51:31,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:51:31,968 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:51:31,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:51:31,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:51:31,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:51:31,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:51:31,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:51:31,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:51:31,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:51:31,970 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:51:31,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:51:31,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:51:31,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:51:31,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:51:31,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:51:31,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:51:31,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:51:31,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:51:31,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:51:31,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:51:31,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:51:31,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:51:31,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:51:31,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:51:31,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:51:31,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:51:31,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:51:31,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:51:31,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:51:31,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:51:31,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:51:31,975 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:51:31,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:51:31,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:51:31,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:51:31,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06f1e7cb4ad4b39445b3c30d820384fbedafa8e52cac3d3c0cb4d178fb229699 [2021-12-21 13:51:32,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:51:32,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:51:32,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:51:32,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:51:32,153 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:51:32,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-12-21 13:51:32,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b566d84/79322cf3d00a4de09962fc84b17575f9/FLAGf01e2d4f7 [2021-12-21 13:51:32,606 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:51:32,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-12-21 13:51:32,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b566d84/79322cf3d00a4de09962fc84b17575f9/FLAGf01e2d4f7 [2021-12-21 13:51:32,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b566d84/79322cf3d00a4de09962fc84b17575f9 [2021-12-21 13:51:32,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:51:32,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:51:32,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:51:32,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:51:32,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:51:32,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:32,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6186e98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32, skipping insertion in model container [2021-12-21 13:51:32,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:32,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:51:32,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:51:32,849 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.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[11714,11727] [2021-12-21 13:51:32,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:51:32,920 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:51:32,962 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.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[11714,11727] [2021-12-21 13:51:32,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:51:32,995 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:51:32,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32 WrapperNode [2021-12-21 13:51:32,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:51:32,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:51:32,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:51:32,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:51:33,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,069 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 964 [2021-12-21 13:51:33,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:51:33,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:51:33,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:51:33,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:51:33,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:51:33,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:51:33,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:51:33,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:51:33,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (1/1) ... [2021-12-21 13:51:33,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:51:33,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:51:33,149 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) [2021-12-21 13:51:33,167 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 [2021-12-21 13:51:33,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:51:33,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:51:33,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:51:33,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:51:33,295 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:51:33,296 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:51:33,869 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:51:33,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:51:33,875 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:51:33,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:51:33 BoogieIcfgContainer [2021-12-21 13:51:33,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:51:33,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:51:33,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:51:33,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:51:33,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:51:32" (1/3) ... [2021-12-21 13:51:33,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52433687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:51:33, skipping insertion in model container [2021-12-21 13:51:33,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:51:32" (2/3) ... [2021-12-21 13:51:33,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52433687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:51:33, skipping insertion in model container [2021-12-21 13:51:33,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:51:33" (3/3) ... [2021-12-21 13:51:33,882 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-12-21 13:51:33,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:51:33,886 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:51:33,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:51:33,922 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 [2021-12-21 13:51:33,922 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:51:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 257 states, 255 states have (on average 1.6705882352941177) internal successors, (426), 256 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 13:51:33,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:33,949 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] [2021-12-21 13:51:33,949 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1061563800, now seen corresponding path program 1 times [2021-12-21 13:51:33,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:33,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881070624] [2021-12-21 13:51:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:33,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:34,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881070624] [2021-12-21 13:51:34,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881070624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:34,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:34,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:51:34,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427753194] [2021-12-21 13:51:34,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:34,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:51:34,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:51:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:51:34,278 INFO L87 Difference]: Start difference. First operand has 257 states, 255 states have (on average 1.6705882352941177) internal successors, (426), 256 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:34,389 INFO L93 Difference]: Finished difference Result 475 states and 772 transitions. [2021-12-21 13:51:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:51:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 13:51:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:34,403 INFO L225 Difference]: With dead ends: 475 [2021-12-21 13:51:34,404 INFO L226 Difference]: Without dead ends: 254 [2021-12-21 13:51:34,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:51:34,413 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 347 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:34,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 886 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-21 13:51:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-12-21 13:51:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.5019762845849802) internal successors, (380), 253 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 380 transitions. [2021-12-21 13:51:34,467 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 380 transitions. Word has length 91 [2021-12-21 13:51:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:34,467 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 380 transitions. [2021-12-21 13:51:34,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 380 transitions. [2021-12-21 13:51:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 13:51:34,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:34,472 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:34,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:51:34,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash 580651905, now seen corresponding path program 1 times [2021-12-21 13:51:34,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:34,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142481025] [2021-12-21 13:51:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:34,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:34,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:34,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142481025] [2021-12-21 13:51:34,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142481025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:34,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:34,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:34,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721241253] [2021-12-21 13:51:34,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:34,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:34,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:34,613 INFO L87 Difference]: Start difference. First operand 254 states and 380 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:34,651 INFO L93 Difference]: Finished difference Result 555 states and 860 transitions. [2021-12-21 13:51:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:34,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-21 13:51:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:34,654 INFO L225 Difference]: With dead ends: 555 [2021-12-21 13:51:34,654 INFO L226 Difference]: Without dead ends: 362 [2021-12-21 13:51:34,655 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 [2021-12-21 13:51:34,656 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 207 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:34,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 662 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-21 13:51:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2021-12-21 13:51:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.5264623955431755) internal successors, (548), 359 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 548 transitions. [2021-12-21 13:51:34,687 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 548 transitions. Word has length 130 [2021-12-21 13:51:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:34,689 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 548 transitions. [2021-12-21 13:51:34,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 548 transitions. [2021-12-21 13:51:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-21 13:51:34,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:34,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:34,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:51:34,697 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1531216486, now seen corresponding path program 1 times [2021-12-21 13:51:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777386491] [2021-12-21 13:51:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:34,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:34,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:34,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777386491] [2021-12-21 13:51:34,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777386491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:34,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:34,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:34,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657506516] [2021-12-21 13:51:34,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:34,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:34,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:34,804 INFO L87 Difference]: Start difference. First operand 360 states and 548 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:34,840 INFO L93 Difference]: Finished difference Result 843 states and 1319 transitions. [2021-12-21 13:51:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-12-21 13:51:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:34,843 INFO L225 Difference]: With dead ends: 843 [2021-12-21 13:51:34,843 INFO L226 Difference]: Without dead ends: 550 [2021-12-21 13:51:34,846 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 [2021-12-21 13:51:34,850 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 194 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:34,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 705 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-21 13:51:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2021-12-21 13:51:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.546617915904936) internal successors, (846), 547 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 846 transitions. [2021-12-21 13:51:34,881 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 846 transitions. Word has length 132 [2021-12-21 13:51:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:34,882 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 846 transitions. [2021-12-21 13:51:34,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 846 transitions. [2021-12-21 13:51:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 13:51:34,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:34,884 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:34,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:51:34,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1634279726, now seen corresponding path program 1 times [2021-12-21 13:51:34,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:34,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372956177] [2021-12-21 13:51:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:34,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:34,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372956177] [2021-12-21 13:51:34,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372956177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:34,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:34,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:34,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864374405] [2021-12-21 13:51:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:34,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:34,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:34,956 INFO L87 Difference]: Start difference. First operand 548 states and 846 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:35,015 INFO L93 Difference]: Finished difference Result 1349 states and 2123 transitions. [2021-12-21 13:51:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-21 13:51:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:35,022 INFO L225 Difference]: With dead ends: 1349 [2021-12-21 13:51:35,023 INFO L226 Difference]: Without dead ends: 874 [2021-12-21 13:51:35,024 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 [2021-12-21 13:51:35,031 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 181 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:35,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 669 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-12-21 13:51:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2021-12-21 13:51:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.5591274397244546) internal successors, (1358), 871 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1358 transitions. [2021-12-21 13:51:35,076 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1358 transitions. Word has length 134 [2021-12-21 13:51:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:35,076 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1358 transitions. [2021-12-21 13:51:35,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1358 transitions. [2021-12-21 13:51:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 13:51:35,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:35,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:35,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:51:35,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:35,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1057437148, now seen corresponding path program 1 times [2021-12-21 13:51:35,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:35,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267249121] [2021-12-21 13:51:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:35,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:35,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:35,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267249121] [2021-12-21 13:51:35,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267249121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:35,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:35,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:35,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442153347] [2021-12-21 13:51:35,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:35,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:35,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:35,148 INFO L87 Difference]: Start difference. First operand 872 states and 1358 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:35,220 INFO L93 Difference]: Finished difference Result 2207 states and 3479 transitions. [2021-12-21 13:51:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-21 13:51:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:35,225 INFO L225 Difference]: With dead ends: 2207 [2021-12-21 13:51:35,225 INFO L226 Difference]: Without dead ends: 1414 [2021-12-21 13:51:35,227 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 [2021-12-21 13:51:35,227 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 168 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:35,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 602 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-12-21 13:51:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1412. [2021-12-21 13:51:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 1.56343019135365) internal successors, (2206), 1411 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2206 transitions. [2021-12-21 13:51:35,312 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2206 transitions. Word has length 136 [2021-12-21 13:51:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:35,314 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 2206 transitions. [2021-12-21 13:51:35,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2206 transitions. [2021-12-21 13:51:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-21 13:51:35,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:35,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:35,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:51:35,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash -518774298, now seen corresponding path program 1 times [2021-12-21 13:51:35,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:35,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495837689] [2021-12-21 13:51:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:35,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:35,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:35,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495837689] [2021-12-21 13:51:35,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495837689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:35,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:35,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:35,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151454871] [2021-12-21 13:51:35,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:35,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:35,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:35,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:35,391 INFO L87 Difference]: Start difference. First operand 1412 states and 2206 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:35,536 INFO L93 Difference]: Finished difference Result 3601 states and 5663 transitions. [2021-12-21 13:51:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:35,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-12-21 13:51:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:35,545 INFO L225 Difference]: With dead ends: 3601 [2021-12-21 13:51:35,545 INFO L226 Difference]: Without dead ends: 2274 [2021-12-21 13:51:35,547 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 [2021-12-21 13:51:35,548 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 155 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:35,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 582 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-12-21 13:51:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2272. [2021-12-21 13:51:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 1.5596653456627037) internal successors, (3542), 2271 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3542 transitions. [2021-12-21 13:51:35,694 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3542 transitions. Word has length 138 [2021-12-21 13:51:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:35,695 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 3542 transitions. [2021-12-21 13:51:35,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3542 transitions. [2021-12-21 13:51:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-21 13:51:35,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:35,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:35,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:51:35,700 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash -300312724, now seen corresponding path program 1 times [2021-12-21 13:51:35,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:35,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655044352] [2021-12-21 13:51:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:35,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:35,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:35,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655044352] [2021-12-21 13:51:35,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655044352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:35,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:35,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:51:35,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813602135] [2021-12-21 13:51:35,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:35,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:51:35,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:51:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:51:35,796 INFO L87 Difference]: Start difference. First operand 2272 states and 3542 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:37,090 INFO L93 Difference]: Finished difference Result 24689 states and 38597 transitions. [2021-12-21 13:51:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:51:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-21 13:51:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:37,161 INFO L225 Difference]: With dead ends: 24689 [2021-12-21 13:51:37,161 INFO L226 Difference]: Without dead ends: 22508 [2021-12-21 13:51:37,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:51:37,172 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 2801 mSDsluCounter, 4660 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2801 SdHoareTripleChecker+Valid, 5291 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:37,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2801 Valid, 5291 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:51:37,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22508 states. [2021-12-21 13:51:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22508 to 4488. [2021-12-21 13:51:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 1.53599286828616) internal successors, (6892), 4487 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 6892 transitions. [2021-12-21 13:51:37,671 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 6892 transitions. Word has length 140 [2021-12-21 13:51:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:37,671 INFO L470 AbstractCegarLoop]: Abstraction has 4488 states and 6892 transitions. [2021-12-21 13:51:37,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 6892 transitions. [2021-12-21 13:51:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 13:51:37,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:37,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:37,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:51:37,680 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2107826276, now seen corresponding path program 1 times [2021-12-21 13:51:37,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:37,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061984386] [2021-12-21 13:51:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:37,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:37,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:37,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061984386] [2021-12-21 13:51:37,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061984386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:37,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:37,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:37,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189291614] [2021-12-21 13:51:37,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:37,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:37,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:37,720 INFO L87 Difference]: Start difference. First operand 4488 states and 6892 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:38,308 INFO L93 Difference]: Finished difference Result 12513 states and 19228 transitions. [2021-12-21 13:51:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-12-21 13:51:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:38,364 INFO L225 Difference]: With dead ends: 12513 [2021-12-21 13:51:38,364 INFO L226 Difference]: Without dead ends: 8074 [2021-12-21 13:51:38,369 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 [2021-12-21 13:51:38,370 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 205 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:38,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 777 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-12-21 13:51:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2021-12-21 13:51:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 1.5267005327716516) internal successors, (12322), 8071 states have internal predecessors, (12322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 12322 transitions. [2021-12-21 13:51:39,040 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 12322 transitions. Word has length 143 [2021-12-21 13:51:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:39,041 INFO L470 AbstractCegarLoop]: Abstraction has 8072 states and 12322 transitions. [2021-12-21 13:51:39,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 12322 transitions. [2021-12-21 13:51:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-21 13:51:39,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:39,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:39,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:51:39,055 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2102558318, now seen corresponding path program 1 times [2021-12-21 13:51:39,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:39,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459394300] [2021-12-21 13:51:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:39,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:39,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:39,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459394300] [2021-12-21 13:51:39,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459394300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:39,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:39,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:39,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219903902] [2021-12-21 13:51:39,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:39,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:39,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:39,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:39,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:39,098 INFO L87 Difference]: Start difference. First operand 8072 states and 12322 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:39,894 INFO L93 Difference]: Finished difference Result 18816 states and 28711 transitions. [2021-12-21 13:51:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2021-12-21 13:51:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:39,912 INFO L225 Difference]: With dead ends: 18816 [2021-12-21 13:51:39,912 INFO L226 Difference]: Without dead ends: 10827 [2021-12-21 13:51:39,920 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 [2021-12-21 13:51:39,920 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 223 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:39,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 516 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:51:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10827 states. [2021-12-21 13:51:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10827 to 10761. [2021-12-21 13:51:40,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10761 states, 10760 states have (on average 1.5021375464684015) internal successors, (16163), 10760 states have internal predecessors, (16163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10761 states to 10761 states and 16163 transitions. [2021-12-21 13:51:40,840 INFO L78 Accepts]: Start accepts. Automaton has 10761 states and 16163 transitions. Word has length 144 [2021-12-21 13:51:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:40,841 INFO L470 AbstractCegarLoop]: Abstraction has 10761 states and 16163 transitions. [2021-12-21 13:51:40,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 10761 states and 16163 transitions. [2021-12-21 13:51:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-21 13:51:40,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:40,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:40,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:51:40,860 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 840792049, now seen corresponding path program 1 times [2021-12-21 13:51:40,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407865663] [2021-12-21 13:51:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:40,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:41,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407865663] [2021-12-21 13:51:41,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407865663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:41,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:41,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:51:41,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929280240] [2021-12-21 13:51:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:41,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:51:41,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:51:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:51:41,013 INFO L87 Difference]: Start difference. First operand 10761 states and 16163 transitions. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:42,043 INFO L93 Difference]: Finished difference Result 21440 states and 32230 transitions. [2021-12-21 13:51:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:51:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2021-12-21 13:51:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:42,063 INFO L225 Difference]: With dead ends: 21440 [2021-12-21 13:51:42,064 INFO L226 Difference]: Without dead ends: 10763 [2021-12-21 13:51:42,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-21 13:51:42,077 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 1662 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:42,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 1389 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:51:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10763 states. [2021-12-21 13:51:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10763 to 10761. [2021-12-21 13:51:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10761 states, 10760 states have (on average 1.4871747211895912) internal successors, (16002), 10760 states have internal predecessors, (16002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10761 states to 10761 states and 16002 transitions. [2021-12-21 13:51:42,911 INFO L78 Accepts]: Start accepts. Automaton has 10761 states and 16002 transitions. Word has length 144 [2021-12-21 13:51:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:42,911 INFO L470 AbstractCegarLoop]: Abstraction has 10761 states and 16002 transitions. [2021-12-21 13:51:42,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 10761 states and 16002 transitions. [2021-12-21 13:51:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 13:51:42,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:42,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:42,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:51:42,929 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1097885333, now seen corresponding path program 1 times [2021-12-21 13:51:42,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769787929] [2021-12-21 13:51:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:42,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:42,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:42,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769787929] [2021-12-21 13:51:42,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769787929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:42,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:42,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:42,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124330276] [2021-12-21 13:51:42,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:42,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:42,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:42,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:42,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:42,969 INFO L87 Difference]: Start difference. First operand 10761 states and 16002 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:44,844 INFO L93 Difference]: Finished difference Result 30880 states and 45859 transitions. [2021-12-21 13:51:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-12-21 13:51:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:44,879 INFO L225 Difference]: With dead ends: 30880 [2021-12-21 13:51:44,880 INFO L226 Difference]: Without dead ends: 21346 [2021-12-21 13:51:44,894 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 [2021-12-21 13:51:44,895 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 228 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:44,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 390 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:51:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21346 states. [2021-12-21 13:51:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21346 to 21344. [2021-12-21 13:51:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21344 states, 21343 states have (on average 1.4790329381998781) internal successors, (31567), 21343 states have internal predecessors, (31567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 31567 transitions. [2021-12-21 13:51:46,700 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 31567 transitions. Word has length 145 [2021-12-21 13:51:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:46,700 INFO L470 AbstractCegarLoop]: Abstraction has 21344 states and 31567 transitions. [2021-12-21 13:51:46,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 31567 transitions. [2021-12-21 13:51:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 13:51:46,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:46,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:46,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:51:46,733 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash -501752442, now seen corresponding path program 1 times [2021-12-21 13:51:46,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:46,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905637842] [2021-12-21 13:51:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:46,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:46,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:46,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905637842] [2021-12-21 13:51:46,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905637842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:46,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:46,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:51:46,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288983098] [2021-12-21 13:51:46,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:46,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:51:46,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:51:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:51:46,778 INFO L87 Difference]: Start difference. First operand 21344 states and 31567 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:51:50,032 INFO L93 Difference]: Finished difference Result 61449 states and 90838 transitions. [2021-12-21 13:51:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:51:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-12-21 13:51:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:51:50,102 INFO L225 Difference]: With dead ends: 61449 [2021-12-21 13:51:50,102 INFO L226 Difference]: Without dead ends: 42431 [2021-12-21 13:51:50,129 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 [2021-12-21 13:51:50,130 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 228 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:51:50,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 394 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:51:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42431 states. [2021-12-21 13:51:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42431 to 42429. [2021-12-21 13:51:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42429 states, 42428 states have (on average 1.4724710097105684) internal successors, (62474), 42428 states have internal predecessors, (62474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42429 states to 42429 states and 62474 transitions. [2021-12-21 13:51:53,969 INFO L78 Accepts]: Start accepts. Automaton has 42429 states and 62474 transitions. Word has length 145 [2021-12-21 13:51:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:51:53,970 INFO L470 AbstractCegarLoop]: Abstraction has 42429 states and 62474 transitions. [2021-12-21 13:51:53,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:51:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 42429 states and 62474 transitions. [2021-12-21 13:51:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 13:51:54,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:51:54,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:51:54,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:51:54,031 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:51:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:51:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash -591821183, now seen corresponding path program 1 times [2021-12-21 13:51:54,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:51:54,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647229622] [2021-12-21 13:51:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:51:54,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:51:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:51:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:51:54,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:51:54,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647229622] [2021-12-21 13:51:54,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647229622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:51:54,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:51:54,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:51:54,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925446099] [2021-12-21 13:51:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:51:54,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:51:54,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:51:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:51:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:51:54,125 INFO L87 Difference]: Start difference. First operand 42429 states and 62474 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:52:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:52:14,367 INFO L93 Difference]: Finished difference Result 260647 states and 383605 transitions. [2021-12-21 13:52:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:52:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-12-21 13:52:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted.