./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.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 d852cbbb6aa933b5bfc297e03d0d3456bac2eafa50ad19971e71951b44cb15d3 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:16:09,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:16:09,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:16:09,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:16:09,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:16:09,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:16:09,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:16:09,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:16:09,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:16:09,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:16:09,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:16:09,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:16:09,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:16:09,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:16:09,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:16:09,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:16:09,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:16:09,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:16:09,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:16:09,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:16:09,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:16:09,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:16:09,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:16:09,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:16:09,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:16:09,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:16:09,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:16:09,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:16:09,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:16:09,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:16:09,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:16:09,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:16:09,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:16:09,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:16:09,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:16:09,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:16:09,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:16:09,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:16:09,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:16:09,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:16:09,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:16:09,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:16:09,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:16:09,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:16:09,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:16:09,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:16:09,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:16:09,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:16:09,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:16:09,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:16:09,996 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:16:09,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:16:09,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:16:09,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:16:09,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:16:09,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:16:09,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:16:09,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:16:09,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:16:09,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:16:09,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:16:09,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:16:09,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:16:09,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:16:09,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:16:09,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:16:09,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:16:09,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:16:09,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:16:10,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:16:10,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:16:10,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:16:10,000 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:16:10,000 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:16:10,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:16:10,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:16:10,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d852cbbb6aa933b5bfc297e03d0d3456bac2eafa50ad19971e71951b44cb15d3 [2021-12-15 11:16:10,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:16:10,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:16:10,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:16:10,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:16:10,247 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:16:10,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-12-15 11:16:10,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e1191fa/d61e465b1d5c4cc289c2dd66a31ead16/FLAGf7989664c [2021-12-15 11:16:10,670 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:16:10,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-12-15 11:16:10,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e1191fa/d61e465b1d5c4cc289c2dd66a31ead16/FLAGf7989664c [2021-12-15 11:16:11,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e1191fa/d61e465b1d5c4cc289c2dd66a31ead16 [2021-12-15 11:16:11,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:16:11,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:16:11,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:16:11,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:16:11,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:16:11,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fafe7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11, skipping insertion in model container [2021-12-15 11:16:11,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:16:11,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:16:11,252 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/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2021-12-15 11:16:11,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:16:11,263 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:16:11,289 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/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2021-12-15 11:16:11,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:16:11,299 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:16:11,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11 WrapperNode [2021-12-15 11:16:11,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:16:11,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:16:11,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:16:11,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:16:11,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,361 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 220 [2021-12-15 11:16:11,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:16:11,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:16:11,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:16:11,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:16:11,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:16:11,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:16:11,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:16:11,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:16:11,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (1/1) ... [2021-12-15 11:16:11,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:16:11,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:11,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:16:11,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:16:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:16:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:16:11,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:16:11,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:16:11,518 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:16:11,520 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:16:11,757 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:16:11,762 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:16:11,771 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:16:11,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:16:11 BoogieIcfgContainer [2021-12-15 11:16:11,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:16:11,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:16:11,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:16:11,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:16:11,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:16:11" (1/3) ... [2021-12-15 11:16:11,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d33018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:16:11, skipping insertion in model container [2021-12-15 11:16:11,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:11" (2/3) ... [2021-12-15 11:16:11,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d33018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:16:11, skipping insertion in model container [2021-12-15 11:16:11,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:16:11" (3/3) ... [2021-12-15 11:16:11,791 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-12-15 11:16:11,794 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:16:11,795 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:16:11,844 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:16:11,849 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:16:11,850 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:16:11,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 11:16:11,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:11,878 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] [2021-12-15 11:16:11,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2021-12-15 11:16:11,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:11,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775775555] [2021-12-15 11:16:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:11,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:12,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775775555] [2021-12-15 11:16:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775775555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:12,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:12,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:16:12,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128226493] [2021-12-15 11:16:12,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:12,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:16:12,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:12,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:16:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:16:12,077 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 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 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:12,101 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2021-12-15 11:16:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:16:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 11:16:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:12,110 INFO L225 Difference]: With dead ends: 103 [2021-12-15 11:16:12,110 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 11:16:12,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:16:12,116 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:12,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 11:16:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-15 11:16:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2021-12-15 11:16:12,148 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2021-12-15 11:16:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:12,148 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2021-12-15 11:16:12,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2021-12-15 11:16:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 11:16:12,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:12,150 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] [2021-12-15 11:16:12,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:16:12,151 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2021-12-15 11:16:12,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:12,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519622998] [2021-12-15 11:16:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:12,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:12,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:12,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519622998] [2021-12-15 11:16:12,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519622998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:12,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:12,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:12,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671184199] [2021-12-15 11:16:12,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:12,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:12,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:12,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:12,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:12,257 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:12,337 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2021-12-15 11:16:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:16:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 11:16:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:12,339 INFO L225 Difference]: With dead ends: 134 [2021-12-15 11:16:12,340 INFO L226 Difference]: Without dead ends: 94 [2021-12-15 11:16:12,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:12,343 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 58 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:12,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 339 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-15 11:16:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2021-12-15 11:16:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2021-12-15 11:16:12,352 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2021-12-15 11:16:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:12,352 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2021-12-15 11:16:12,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2021-12-15 11:16:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:16:12,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:12,355 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] [2021-12-15 11:16:12,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:16:12,356 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:12,356 INFO L85 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2021-12-15 11:16:12,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:12,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089848670] [2021-12-15 11:16:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:12,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:12,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089848670] [2021-12-15 11:16:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089848670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:12,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:12,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:12,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749342937] [2021-12-15 11:16:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:12,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:12,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:12,410 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:12,427 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-12-15 11:16:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:12,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-15 11:16:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:12,440 INFO L225 Difference]: With dead ends: 124 [2021-12-15 11:16:12,440 INFO L226 Difference]: Without dead ends: 88 [2021-12-15 11:16:12,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:12,442 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:12,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-15 11:16:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-12-15 11:16:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2021-12-15 11:16:12,463 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2021-12-15 11:16:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:12,463 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2021-12-15 11:16:12,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2021-12-15 11:16:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:16:12,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:12,464 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] [2021-12-15 11:16:12,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:16:12,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2021-12-15 11:16:12,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:12,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908768827] [2021-12-15 11:16:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:12,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:12,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908768827] [2021-12-15 11:16:12,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908768827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:12,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:12,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:12,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883543497] [2021-12-15 11:16:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:12,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:12,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:12,562 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:12,587 INFO L93 Difference]: Finished difference Result 202 states and 302 transitions. [2021-12-15 11:16:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-15 11:16:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:12,589 INFO L225 Difference]: With dead ends: 202 [2021-12-15 11:16:12,589 INFO L226 Difference]: Without dead ends: 138 [2021-12-15 11:16:12,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:12,590 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:12,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 173 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-15 11:16:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-12-15 11:16:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.474074074074074) internal successors, (199), 135 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2021-12-15 11:16:12,601 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 40 [2021-12-15 11:16:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:12,601 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2021-12-15 11:16:12,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2021-12-15 11:16:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:16:12,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:12,603 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] [2021-12-15 11:16:12,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:16:12,603 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:12,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2021-12-15 11:16:12,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:12,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433897605] [2021-12-15 11:16:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:12,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:12,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:12,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433897605] [2021-12-15 11:16:12,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433897605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:12,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:12,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:12,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788324557] [2021-12-15 11:16:12,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:12,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:12,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:12,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:12,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:12,653 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:12,677 INFO L93 Difference]: Finished difference Result 340 states and 513 transitions. [2021-12-15 11:16:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-15 11:16:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:12,684 INFO L225 Difference]: With dead ends: 340 [2021-12-15 11:16:12,686 INFO L226 Difference]: Without dead ends: 226 [2021-12-15 11:16:12,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:12,688 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:12,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 172 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-15 11:16:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-12-15 11:16:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.484304932735426) internal successors, (331), 223 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 331 transitions. [2021-12-15 11:16:12,710 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 331 transitions. Word has length 40 [2021-12-15 11:16:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:12,711 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 331 transitions. [2021-12-15 11:16:12,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 331 transitions. [2021-12-15 11:16:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:16:12,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:12,713 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] [2021-12-15 11:16:12,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:16:12,714 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:12,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:12,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2021-12-15 11:16:12,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094517188] [2021-12-15 11:16:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:12,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:12,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:12,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094517188] [2021-12-15 11:16:12,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094517188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:12,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:12,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:12,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531257102] [2021-12-15 11:16:12,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:12,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:12,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:12,773 INFO L87 Difference]: Start difference. First operand 224 states and 331 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:12,866 INFO L93 Difference]: Finished difference Result 1436 states and 2185 transitions. [2021-12-15 11:16:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:16:12,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-15 11:16:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:12,880 INFO L225 Difference]: With dead ends: 1436 [2021-12-15 11:16:12,881 INFO L226 Difference]: Without dead ends: 1234 [2021-12-15 11:16:12,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:16:12,883 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 385 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:12,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 371 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-12-15 11:16:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 424. [2021-12-15 11:16:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4728132387706856) internal successors, (623), 423 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 623 transitions. [2021-12-15 11:16:12,927 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 623 transitions. Word has length 40 [2021-12-15 11:16:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:12,927 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 623 transitions. [2021-12-15 11:16:12,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 623 transitions. [2021-12-15 11:16:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:16:12,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:12,928 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] [2021-12-15 11:16:12,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:16:12,928 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1209274118, now seen corresponding path program 1 times [2021-12-15 11:16:12,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:12,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961457787] [2021-12-15 11:16:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:12,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:13,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:13,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961457787] [2021-12-15 11:16:13,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961457787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:13,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:13,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:13,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301541343] [2021-12-15 11:16:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:13,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:13,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:13,048 INFO L87 Difference]: Start difference. First operand 424 states and 623 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:13,111 INFO L93 Difference]: Finished difference Result 828 states and 1225 transitions. [2021-12-15 11:16:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:16:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:13,115 INFO L225 Difference]: With dead ends: 828 [2021-12-15 11:16:13,115 INFO L226 Difference]: Without dead ends: 426 [2021-12-15 11:16:13,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:16:13,120 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 89 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:13,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 229 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-15 11:16:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2021-12-15 11:16:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4539007092198581) internal successors, (615), 423 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 615 transitions. [2021-12-15 11:16:13,143 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 615 transitions. Word has length 42 [2021-12-15 11:16:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:13,144 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 615 transitions. [2021-12-15 11:16:13,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 615 transitions. [2021-12-15 11:16:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:16:13,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:13,150 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] [2021-12-15 11:16:13,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:16:13,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1142780606, now seen corresponding path program 1 times [2021-12-15 11:16:13,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:13,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616583309] [2021-12-15 11:16:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:13,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:13,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616583309] [2021-12-15 11:16:13,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616583309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:13,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:13,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:13,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433309354] [2021-12-15 11:16:13,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:13,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:13,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:13,210 INFO L87 Difference]: Start difference. First operand 424 states and 615 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:13,234 INFO L93 Difference]: Finished difference Result 1010 states and 1475 transitions. [2021-12-15 11:16:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:16:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:13,243 INFO L225 Difference]: With dead ends: 1010 [2021-12-15 11:16:13,243 INFO L226 Difference]: Without dead ends: 608 [2021-12-15 11:16:13,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:13,244 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:13,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 144 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-12-15 11:16:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 606. [2021-12-15 11:16:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.4363636363636363) internal successors, (869), 605 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 869 transitions. [2021-12-15 11:16:13,263 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 869 transitions. Word has length 42 [2021-12-15 11:16:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:13,263 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 869 transitions. [2021-12-15 11:16:13,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 869 transitions. [2021-12-15 11:16:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:16:13,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:13,264 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] [2021-12-15 11:16:13,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:16:13,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1581931209, now seen corresponding path program 1 times [2021-12-15 11:16:13,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135886791] [2021-12-15 11:16:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:13,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:13,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:13,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135886791] [2021-12-15 11:16:13,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135886791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:13,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:13,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:13,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857824751] [2021-12-15 11:16:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:13,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:16:13,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:16:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:16:13,320 INFO L87 Difference]: Start difference. First operand 606 states and 869 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:13,450 INFO L93 Difference]: Finished difference Result 1686 states and 2443 transitions. [2021-12-15 11:16:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:16:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 11:16:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:13,454 INFO L225 Difference]: With dead ends: 1686 [2021-12-15 11:16:13,454 INFO L226 Difference]: Without dead ends: 1104 [2021-12-15 11:16:13,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:16:13,456 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 366 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:13,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 141 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:16:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-12-15 11:16:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1006. [2021-12-15 11:16:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.4378109452736318) internal successors, (1445), 1005 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1445 transitions. [2021-12-15 11:16:13,492 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1445 transitions. Word has length 43 [2021-12-15 11:16:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:13,492 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1445 transitions. [2021-12-15 11:16:13,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1445 transitions. [2021-12-15 11:16:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:16:13,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:13,493 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] [2021-12-15 11:16:13,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:16:13,494 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2021-12-15 11:16:13,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150572292] [2021-12-15 11:16:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:13,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:13,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:13,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150572292] [2021-12-15 11:16:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150572292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:13,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:13,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:16:13,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150595773] [2021-12-15 11:16:13,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:13,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:16:13,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:16:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:16:13,576 INFO L87 Difference]: Start difference. First operand 1006 states and 1445 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:13,734 INFO L93 Difference]: Finished difference Result 1993 states and 2820 transitions. [2021-12-15 11:16:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:16:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 11:16:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:13,741 INFO L225 Difference]: With dead ends: 1993 [2021-12-15 11:16:13,741 INFO L226 Difference]: Without dead ends: 1991 [2021-12-15 11:16:13,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:16:13,742 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 333 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:13,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 428 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-12-15 11:16:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1102. [2021-12-15 11:16:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 1.3960036330608538) internal successors, (1537), 1101 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1537 transitions. [2021-12-15 11:16:13,795 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1537 transitions. Word has length 43 [2021-12-15 11:16:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:13,795 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1537 transitions. [2021-12-15 11:16:13,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1537 transitions. [2021-12-15 11:16:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:16:13,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:13,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:13,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:16:13,797 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2021-12-15 11:16:13,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361936821] [2021-12-15 11:16:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:13,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 11:16:13,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:13,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361936821] [2021-12-15 11:16:13,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361936821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:13,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:13,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:13,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503127799] [2021-12-15 11:16:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:13,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:13,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:13,843 INFO L87 Difference]: Start difference. First operand 1102 states and 1537 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:13,999 INFO L93 Difference]: Finished difference Result 4698 states and 6565 transitions. [2021-12-15 11:16:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 63 [2021-12-15 11:16:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:14,011 INFO L225 Difference]: With dead ends: 4698 [2021-12-15 11:16:14,011 INFO L226 Difference]: Without dead ends: 3620 [2021-12-15 11:16:14,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:14,014 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 194 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:14,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 299 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-12-15 11:16:14,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2178. [2021-12-15 11:16:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 1.3913642627468994) internal successors, (3029), 2177 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3029 transitions. [2021-12-15 11:16:14,130 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3029 transitions. Word has length 63 [2021-12-15 11:16:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:14,130 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 3029 transitions. [2021-12-15 11:16:14,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3029 transitions. [2021-12-15 11:16:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:16:14,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:14,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:14,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:16:14,132 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:14,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1499181678, now seen corresponding path program 1 times [2021-12-15 11:16:14,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:14,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913076506] [2021-12-15 11:16:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:14,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 11:16:14,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:14,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913076506] [2021-12-15 11:16:14,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913076506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:14,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:14,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:14,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402604707] [2021-12-15 11:16:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:14,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:14,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:14,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:14,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:14,187 INFO L87 Difference]: Start difference. First operand 2178 states and 3029 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:14,450 INFO L93 Difference]: Finished difference Result 5774 states and 8057 transitions. [2021-12-15 11:16:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 63 [2021-12-15 11:16:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:14,467 INFO L225 Difference]: With dead ends: 5774 [2021-12-15 11:16:14,468 INFO L226 Difference]: Without dead ends: 4696 [2021-12-15 11:16:14,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:14,474 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 189 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:14,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 324 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2021-12-15 11:16:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3794. [2021-12-15 11:16:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 1.3838650145003955) internal successors, (5249), 3793 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 5249 transitions. [2021-12-15 11:16:14,682 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 5249 transitions. Word has length 63 [2021-12-15 11:16:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:14,682 INFO L470 AbstractCegarLoop]: Abstraction has 3794 states and 5249 transitions. [2021-12-15 11:16:14,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 5249 transitions. [2021-12-15 11:16:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:16:14,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:14,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:14,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:16:14,684 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:14,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2021-12-15 11:16:14,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:14,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792180737] [2021-12-15 11:16:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:14,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:16:14,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:14,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792180737] [2021-12-15 11:16:14,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792180737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:14,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:14,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:14,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431603611] [2021-12-15 11:16:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:14,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:14,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:14,742 INFO L87 Difference]: Start difference. First operand 3794 states and 5249 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:15,006 INFO L93 Difference]: Finished difference Result 6490 states and 9069 transitions. [2021-12-15 11:16:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 63 [2021-12-15 11:16:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:15,027 INFO L225 Difference]: With dead ends: 6490 [2021-12-15 11:16:15,027 INFO L226 Difference]: Without dead ends: 5592 [2021-12-15 11:16:15,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:15,032 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 186 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:15,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 311 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2021-12-15 11:16:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 4690. [2021-12-15 11:16:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4689 states have (on average 1.3872894007251013) internal successors, (6505), 4689 states have internal predecessors, (6505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6505 transitions. [2021-12-15 11:16:15,340 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6505 transitions. Word has length 63 [2021-12-15 11:16:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:15,341 INFO L470 AbstractCegarLoop]: Abstraction has 4690 states and 6505 transitions. [2021-12-15 11:16:15,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6505 transitions. [2021-12-15 11:16:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:16:15,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:15,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:15,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:16:15,343 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash -229876224, now seen corresponding path program 1 times [2021-12-15 11:16:15,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110500420] [2021-12-15 11:16:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:15,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:15,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:15,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110500420] [2021-12-15 11:16:15,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110500420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:16:15,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64422974] [2021-12-15 11:16:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:15,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:16:15,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:15,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:16:15,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 11:16:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:15,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 11:16:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:16:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:16:15,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:16:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:16:16,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64422974] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:16:16,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:16:16,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 4] total 20 [2021-12-15 11:16:16,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559943567] [2021-12-15 11:16:16,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 11:16:16,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 11:16:16,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-12-15 11:16:16,181 INFO L87 Difference]: Start difference. First operand 4690 states and 6505 transitions. Second operand has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:19,030 INFO L93 Difference]: Finished difference Result 28353 states and 38978 transitions. [2021-12-15 11:16:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-15 11:16:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 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 64 [2021-12-15 11:16:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:19,087 INFO L225 Difference]: With dead ends: 28353 [2021-12-15 11:16:19,088 INFO L226 Difference]: Without dead ends: 23687 [2021-12-15 11:16:19,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1708, Invalid=6848, Unknown=0, NotChecked=0, Total=8556 [2021-12-15 11:16:19,101 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 2937 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2937 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:19,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2937 Valid, 1374 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 11:16:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23687 states. [2021-12-15 11:16:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23687 to 16084. [2021-12-15 11:16:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16084 states, 16083 states have (on average 1.344463097680781) internal successors, (21623), 16083 states have internal predecessors, (21623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16084 states to 16084 states and 21623 transitions. [2021-12-15 11:16:19,857 INFO L78 Accepts]: Start accepts. Automaton has 16084 states and 21623 transitions. Word has length 64 [2021-12-15 11:16:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:19,857 INFO L470 AbstractCegarLoop]: Abstraction has 16084 states and 21623 transitions. [2021-12-15 11:16:19,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 16084 states and 21623 transitions. [2021-12-15 11:16:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:16:19,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:19,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:19,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 11:16:20,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 11:16:20,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash 550341158, now seen corresponding path program 1 times [2021-12-15 11:16:20,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:20,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217846165] [2021-12-15 11:16:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:20,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:20,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217846165] [2021-12-15 11:16:20,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217846165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:16:20,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960445482] [2021-12-15 11:16:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:20,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:16:20,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:20,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:16:20,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 11:16:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 11:16:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:16:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:21,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:16:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:21,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960445482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:16:21,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:16:21,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-15 11:16:21,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855035581] [2021-12-15 11:16:21,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:16:21,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 11:16:21,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 11:16:21,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-12-15 11:16:21,660 INFO L87 Difference]: Start difference. First operand 16084 states and 21623 transitions. Second operand has 24 states, 24 states have (on average 7.333333333333333) internal successors, (176), 24 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:48,259 INFO L93 Difference]: Finished difference Result 381043 states and 500441 transitions. [2021-12-15 11:16:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2021-12-15 11:16:48,268 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.333333333333333) internal successors, (176), 24 states have internal predecessors, (176), 0 states have call successors, (0), 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 65 [2021-12-15 11:16:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:49,112 INFO L225 Difference]: With dead ends: 381043 [2021-12-15 11:16:49,112 INFO L226 Difference]: Without dead ends: 364983 [2021-12-15 11:16:49,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43769 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9585, Invalid=91221, Unknown=0, NotChecked=0, Total=100806 [2021-12-15 11:16:49,249 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 5078 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5078 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:49,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5078 Valid, 1859 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 11:16:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364983 states. [2021-12-15 11:16:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364983 to 85158. [2021-12-15 11:16:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85158 states, 85157 states have (on average 1.3406296605094121) internal successors, (114164), 85157 states have internal predecessors, (114164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85158 states to 85158 states and 114164 transitions. [2021-12-15 11:16:56,216 INFO L78 Accepts]: Start accepts. Automaton has 85158 states and 114164 transitions. Word has length 65 [2021-12-15 11:16:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:56,216 INFO L470 AbstractCegarLoop]: Abstraction has 85158 states and 114164 transitions. [2021-12-15 11:16:56,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.333333333333333) internal successors, (176), 24 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 85158 states and 114164 transitions. [2021-12-15 11:16:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:16:56,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:56,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:56,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 11:16:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 11:16:56,424 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash 625513838, now seen corresponding path program 1 times [2021-12-15 11:16:56,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:56,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021925721] [2021-12-15 11:16:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:56,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:56,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:56,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021925721] [2021-12-15 11:16:56,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021925721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:56,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:56,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:56,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314417905] [2021-12-15 11:16:56,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:56,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:56,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:56,461 INFO L87 Difference]: Start difference. First operand 85158 states and 114164 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:00,759 INFO L93 Difference]: Finished difference Result 170294 states and 228305 transitions. [2021-12-15 11:17:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:17:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-15 11:17:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:00,909 INFO L225 Difference]: With dead ends: 170294 [2021-12-15 11:17:00,909 INFO L226 Difference]: Without dead ends: 85160 [2021-12-15 11:17:00,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:00,970 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:00,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 162 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:17:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85160 states. [2021-12-15 11:17:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85160 to 83238. [2021-12-15 11:17:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83238 states, 83237 states have (on average 1.3138868532023018) internal successors, (109364), 83237 states have internal predecessors, (109364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83238 states to 83238 states and 109364 transitions. [2021-12-15 11:17:05,905 INFO L78 Accepts]: Start accepts. Automaton has 83238 states and 109364 transitions. Word has length 65 [2021-12-15 11:17:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:05,905 INFO L470 AbstractCegarLoop]: Abstraction has 83238 states and 109364 transitions. [2021-12-15 11:17:05,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 83238 states and 109364 transitions. [2021-12-15 11:17:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:17:05,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:05,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:05,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:17:05,908 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -621993778, now seen corresponding path program 1 times [2021-12-15 11:17:05,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923397056] [2021-12-15 11:17:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:05,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:05,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923397056] [2021-12-15 11:17:05,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923397056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:17:05,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:17:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:17:05,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928178842] [2021-12-15 11:17:05,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:17:05,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:17:05,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:17:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:17:05,952 INFO L87 Difference]: Start difference. First operand 83238 states and 109364 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)