./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.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-var-start-time.5.1.ufo.UNBOUNDED.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 cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:15:42,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:15:42,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:15:42,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:15:42,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:15:42,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:15:42,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:15:42,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:15:42,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:15:42,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:15:42,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:15:42,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:15:42,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:15:42,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:15:42,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:15:42,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:15:42,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:15:42,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:15:42,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:15:42,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:15:42,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:15:42,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:15:42,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:15:42,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:15:42,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:15:42,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:15:42,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:15:42,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:15:42,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:15:42,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:15:42,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:15:42,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:15:42,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:15:42,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:15:42,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:15:42,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:15:42,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:15:42,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:15:42,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:15:42,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:15:42,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:15:42,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:15:42,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:15:42,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:15:42,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:15:42,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:15:42,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:15:42,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:15:42,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:15:42,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:15:42,361 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:15:42,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:15:42,362 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:15:42,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:15:42,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:15:42,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:15:42,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:15:42,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:15:42,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:15:42,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:15:42,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:15:42,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:15:42,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:15:42,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:15:42,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:15:42,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:15:42,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:15:42,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:15:42,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:15:42,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:15:42,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:15:42,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:15:42,366 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:15:42,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:15:42,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:15:42,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:15:42,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c [2021-12-15 11:15:42,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:15:42,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:15:42,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:15:42,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:15:42,643 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:15:42,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-12-15 11:15:42,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9b5e805/c994992041ca415696aab803a5f53edb/FLAGe18212d79 [2021-12-15 11:15:43,079 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:15:43,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-12-15 11:15:43,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9b5e805/c994992041ca415696aab803a5f53edb/FLAGe18212d79 [2021-12-15 11:15:43,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9b5e805/c994992041ca415696aab803a5f53edb [2021-12-15 11:15:43,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:15:43,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:15:43,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:15:43,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:15:43,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:15:43,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e504aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43, skipping insertion in model container [2021-12-15 11:15:43,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:15:43,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:15:43,790 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-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-12-15 11:15:43,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:15:43,810 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:15:43,870 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-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-12-15 11:15:43,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:15:43,898 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:15:43,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43 WrapperNode [2021-12-15 11:15:43,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:15:43,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:15:43,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:15:43,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:15:43,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,946 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 389 [2021-12-15 11:15:43,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:15:43,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:15:43,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:15:43,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:15:43,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:15:43,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:15:43,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:15:43,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:15:43,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (1/1) ... [2021-12-15 11:15:43,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:15:44,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:15:44,015 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 11:15:44,034 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 11:15:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:15:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:15:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:15:44,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:15:44,153 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:15:44,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:15:44,640 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:15:44,650 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:15:44,651 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:15:44,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:44 BoogieIcfgContainer [2021-12-15 11:15:44,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:15:44,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:15:44,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:15:44,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:15:44,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:15:43" (1/3) ... [2021-12-15 11:15:44,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2545ec36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:44, skipping insertion in model container [2021-12-15 11:15:44,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:43" (2/3) ... [2021-12-15 11:15:44,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2545ec36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:44, skipping insertion in model container [2021-12-15 11:15:44,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:44" (3/3) ... [2021-12-15 11:15:44,662 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-12-15 11:15:44,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:15:44,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:15:44,734 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:15:44,740 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 11:15:44,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:15:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 123 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 11:15:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 11:15:44,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:44,777 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] [2021-12-15 11:15:44,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1522683097, now seen corresponding path program 1 times [2021-12-15 11:15:44,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:44,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907443193] [2021-12-15 11:15:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:44,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:44,980 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 11:15:44,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:44,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907443193] [2021-12-15 11:15:44,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907443193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:44,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:44,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:15:44,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096395964] [2021-12-15 11:15:44,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:44,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:15:44,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:15:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:15:45,019 INFO L87 Difference]: Start difference. First operand has 124 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 123 states have internal predecessors, (208), 0 states have call successors, (0), 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 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 11:15:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:45,056 INFO L93 Difference]: Finished difference Result 207 states and 343 transitions. [2021-12-15 11:15:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:15:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-15 11:15:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:45,069 INFO L225 Difference]: With dead ends: 207 [2021-12-15 11:15:45,069 INFO L226 Difference]: Without dead ends: 120 [2021-12-15 11:15:45,073 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 11:15:45,080 INFO L933 BasicCegarLoop]: 201 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, 201 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 11:15:45,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-15 11:15:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-15 11:15:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 119 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 11:15:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 201 transitions. [2021-12-15 11:15:45,126 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 201 transitions. Word has length 34 [2021-12-15 11:15:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:45,126 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 201 transitions. [2021-12-15 11:15:45,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 11:15:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 201 transitions. [2021-12-15 11:15:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 11:15:45,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:45,130 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] [2021-12-15 11:15:45,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:15:45,131 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -136479703, now seen corresponding path program 1 times [2021-12-15 11:15:45,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:45,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088044876] [2021-12-15 11:15:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:45,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:45,265 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 11:15:45,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:45,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088044876] [2021-12-15 11:15:45,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088044876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:45,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:45,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:15:45,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670030380] [2021-12-15 11:15:45,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:45,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:15:45,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:45,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:15:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:15:45,272 INFO L87 Difference]: Start difference. First operand 120 states and 201 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 11:15:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:45,363 INFO L93 Difference]: Finished difference Result 206 states and 336 transitions. [2021-12-15 11:15:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:15:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-15 11:15:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:45,367 INFO L225 Difference]: With dead ends: 206 [2021-12-15 11:15:45,367 INFO L226 Difference]: Without dead ends: 120 [2021-12-15 11:15:45,368 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 11:15:45,370 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 3 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:45,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 761 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-15 11:15:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-15 11:15:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4201680672268908) internal successors, (169), 119 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 11:15:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 169 transitions. [2021-12-15 11:15:45,381 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 169 transitions. Word has length 34 [2021-12-15 11:15:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:45,382 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 169 transitions. [2021-12-15 11:15:45,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 11:15:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 169 transitions. [2021-12-15 11:15:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:15:45,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:45,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:45,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:15:45,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash 958823668, now seen corresponding path program 1 times [2021-12-15 11:15:45,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947406603] [2021-12-15 11:15:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:45,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:45,520 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 11:15:45,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:45,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947406603] [2021-12-15 11:15:45,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947406603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:45,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:45,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:45,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405800877] [2021-12-15 11:15:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:45,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:45,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:45,523 INFO L87 Difference]: Start difference. First operand 120 states and 169 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 11:15:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:45,543 INFO L93 Difference]: Finished difference Result 272 states and 411 transitions. [2021-12-15 11:15:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:45,544 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 11:15:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:45,548 INFO L225 Difference]: With dead ends: 272 [2021-12-15 11:15:45,548 INFO L226 Difference]: Without dead ends: 190 [2021-12-15 11:15:45,549 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 11:15:45,553 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 114 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 376 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 11:15:45,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 376 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-15 11:15:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-12-15 11:15:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.4866310160427807) internal successors, (278), 187 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 11:15:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 278 transitions. [2021-12-15 11:15:45,567 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 278 transitions. Word has length 65 [2021-12-15 11:15:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:45,567 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 278 transitions. [2021-12-15 11:15:45,567 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 11:15:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 278 transitions. [2021-12-15 11:15:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:15:45,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:45,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:45,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:15:45,570 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:45,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1904004827, now seen corresponding path program 1 times [2021-12-15 11:15:45,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:45,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469392243] [2021-12-15 11:15:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:45,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:45,645 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 11:15:45,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:45,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469392243] [2021-12-15 11:15:45,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469392243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:45,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:45,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293700975] [2021-12-15 11:15:45,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:45,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:45,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:45,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:45,649 INFO L87 Difference]: Start difference. First operand 188 states and 278 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 11:15:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:45,678 INFO L93 Difference]: Finished difference Result 464 states and 718 transitions. [2021-12-15 11:15:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:45,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 11:15:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:45,681 INFO L225 Difference]: With dead ends: 464 [2021-12-15 11:15:45,682 INFO L226 Difference]: Without dead ends: 314 [2021-12-15 11:15:45,684 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 11:15:45,685 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 109 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 367 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 11:15:45,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 367 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-15 11:15:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-12-15 11:15:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.527331189710611) internal successors, (475), 311 states have internal predecessors, (475), 0 states have call successors, (0), 0 states 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 11:15:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 475 transitions. [2021-12-15 11:15:45,709 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 475 transitions. Word has length 66 [2021-12-15 11:15:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:45,710 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 475 transitions. [2021-12-15 11:15:45,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 11:15:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 475 transitions. [2021-12-15 11:15:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:15:45,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:45,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:45,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:15:45,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1896694372, now seen corresponding path program 1 times [2021-12-15 11:15:45,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:45,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088373238] [2021-12-15 11:15:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:45,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:45,795 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 11:15:45,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:45,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088373238] [2021-12-15 11:15:45,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088373238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:45,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:45,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:45,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835881477] [2021-12-15 11:15:45,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:45,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:45,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:45,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:45,800 INFO L87 Difference]: Start difference. First operand 312 states and 475 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 11:15:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:45,831 INFO L93 Difference]: Finished difference Result 812 states and 1269 transitions. [2021-12-15 11:15:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-15 11:15:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:45,834 INFO L225 Difference]: With dead ends: 812 [2021-12-15 11:15:45,835 INFO L226 Difference]: Without dead ends: 538 [2021-12-15 11:15:45,835 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 11:15:45,836 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 104 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 358 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 11:15:45,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-12-15 11:15:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2021-12-15 11:15:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.5457943925233646) internal successors, (827), 535 states have internal predecessors, (827), 0 states have call successors, (0), 0 states 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 11:15:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 827 transitions. [2021-12-15 11:15:45,860 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 827 transitions. Word has length 67 [2021-12-15 11:15:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:45,860 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 827 transitions. [2021-12-15 11:15:45,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 11:15:45,861 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 827 transitions. [2021-12-15 11:15:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:15:45,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:45,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:45,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:15:45,862 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:45,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1528655733, now seen corresponding path program 1 times [2021-12-15 11:15:45,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:45,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123250022] [2021-12-15 11:15:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:45,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:45,906 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 11:15:45,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:45,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123250022] [2021-12-15 11:15:45,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123250022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:45,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:45,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:45,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352595516] [2021-12-15 11:15:45,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:45,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:45,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:45,909 INFO L87 Difference]: Start difference. First operand 536 states and 827 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 11:15:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:45,969 INFO L93 Difference]: Finished difference Result 1436 states and 2245 transitions. [2021-12-15 11:15:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-15 11:15:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:45,974 INFO L225 Difference]: With dead ends: 1436 [2021-12-15 11:15:45,974 INFO L226 Difference]: Without dead ends: 938 [2021-12-15 11:15:45,975 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 11:15:45,976 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 99 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 349 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 11:15:45,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 349 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-12-15 11:15:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 936. [2021-12-15 11:15:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.5475935828877005) internal successors, (1447), 935 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states 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 11:15:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1447 transitions. [2021-12-15 11:15:46,014 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1447 transitions. Word has length 68 [2021-12-15 11:15:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:46,016 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1447 transitions. [2021-12-15 11:15:46,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 11:15:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1447 transitions. [2021-12-15 11:15:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:15:46,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:46,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:46,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:15:46,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -571662380, now seen corresponding path program 1 times [2021-12-15 11:15:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430957637] [2021-12-15 11:15:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:46,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:46,105 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 11:15:46,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:46,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430957637] [2021-12-15 11:15:46,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430957637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:46,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:46,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 11:15:46,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818005183] [2021-12-15 11:15:46,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:46,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:15:46,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:15:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:15:46,107 INFO L87 Difference]: Start difference. First operand 936 states and 1447 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 11:15:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:46,339 INFO L93 Difference]: Finished difference Result 6324 states and 9901 transitions. [2021-12-15 11:15:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:15:46,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-15 11:15:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:46,361 INFO L225 Difference]: With dead ends: 6324 [2021-12-15 11:15:46,361 INFO L226 Difference]: Without dead ends: 5426 [2021-12-15 11:15:46,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:15:46,365 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1237 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2014 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:46,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 2014 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:15:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-12-15 11:15:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 1832. [2021-12-15 11:15:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 1.5417804478427088) internal successors, (2823), 1831 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states 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 11:15:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2823 transitions. [2021-12-15 11:15:46,459 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2823 transitions. Word has length 69 [2021-12-15 11:15:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:46,460 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 2823 transitions. [2021-12-15 11:15:46,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 11:15:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2823 transitions. [2021-12-15 11:15:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 11:15:46,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:46,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:46,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:15:46,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash -924987803, now seen corresponding path program 1 times [2021-12-15 11:15:46,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428551519] [2021-12-15 11:15:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:46,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:46,620 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 11:15:46,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428551519] [2021-12-15 11:15:46,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428551519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:46,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:46,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 11:15:46,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514253970] [2021-12-15 11:15:46,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:46,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:15:46,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:15:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:15:46,624 INFO L87 Difference]: Start difference. First operand 1832 states and 2823 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 11:15:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:46,945 INFO L93 Difference]: Finished difference Result 9874 states and 15148 transitions. [2021-12-15 11:15:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:15:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-12-15 11:15:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:46,974 INFO L225 Difference]: With dead ends: 9874 [2021-12-15 11:15:46,974 INFO L226 Difference]: Without dead ends: 8080 [2021-12-15 11:15:46,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:15:46,981 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 552 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:15:46,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 979 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:15:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-12-15 11:15:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 8072. [2021-12-15 11:15:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 1.5273200346921076) internal successors, (12327), 8071 states have internal predecessors, (12327), 0 states have call successors, (0), 0 states 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 11:15:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 12327 transitions. [2021-12-15 11:15:47,308 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 12327 transitions. Word has length 70 [2021-12-15 11:15:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:47,309 INFO L470 AbstractCegarLoop]: Abstraction has 8072 states and 12327 transitions. [2021-12-15 11:15:47,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 11:15:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 12327 transitions. [2021-12-15 11:15:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:15:47,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:47,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:47,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:15:47,318 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash 810353873, now seen corresponding path program 1 times [2021-12-15 11:15:47,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:47,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102030453] [2021-12-15 11:15:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:47,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:47,377 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 11:15:47,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102030453] [2021-12-15 11:15:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102030453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:47,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:47,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:47,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847409681] [2021-12-15 11:15:47,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:47,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:47,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:47,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:47,381 INFO L87 Difference]: Start difference. First operand 8072 states and 12327 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 11:15:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:47,812 INFO L93 Difference]: Finished difference Result 21996 states and 33385 transitions. [2021-12-15 11:15:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-15 11:15:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:47,874 INFO L225 Difference]: With dead ends: 21996 [2021-12-15 11:15:47,875 INFO L226 Difference]: Without dead ends: 13962 [2021-12-15 11:15:47,886 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 11:15:47,888 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 395 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 11:15:47,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 395 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13962 states. [2021-12-15 11:15:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13962 to 13960. [2021-12-15 11:15:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13960 states, 13959 states have (on average 1.4997492657067124) internal successors, (20935), 13959 states have internal predecessors, (20935), 0 states have call successors, (0), 0 states 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 11:15:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13960 states to 13960 states and 20935 transitions. [2021-12-15 11:15:48,550 INFO L78 Accepts]: Start accepts. Automaton has 13960 states and 20935 transitions. Word has length 71 [2021-12-15 11:15:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:48,550 INFO L470 AbstractCegarLoop]: Abstraction has 13960 states and 20935 transitions. [2021-12-15 11:15:48,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 11:15:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 13960 states and 20935 transitions. [2021-12-15 11:15:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:15:48,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:48,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:48,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:15:48,553 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash -241201943, now seen corresponding path program 1 times [2021-12-15 11:15:48,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:48,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883652780] [2021-12-15 11:15:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:48,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:48,634 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 11:15:48,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883652780] [2021-12-15 11:15:48,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883652780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:48,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:48,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:15:48,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949678444] [2021-12-15 11:15:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:48,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:15:48,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:15:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:15:48,637 INFO L87 Difference]: Start difference. First operand 13960 states and 20935 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 11:15:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:49,651 INFO L93 Difference]: Finished difference Result 29162 states and 43112 transitions. [2021-12-15 11:15:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:15:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-15 11:15:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:49,720 INFO L225 Difference]: With dead ends: 29162 [2021-12-15 11:15:49,721 INFO L226 Difference]: Without dead ends: 29160 [2021-12-15 11:15:49,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:15:49,734 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 951 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 824 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 11:15:49,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 824 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-12-15 11:15:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 14920. [2021-12-15 11:15:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14920 states, 14919 states have (on average 1.4675916616395202) internal successors, (21895), 14919 states have internal predecessors, (21895), 0 states have call successors, (0), 0 states 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 11:15:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14920 states to 14920 states and 21895 transitions. [2021-12-15 11:15:50,541 INFO L78 Accepts]: Start accepts. Automaton has 14920 states and 21895 transitions. Word has length 71 [2021-12-15 11:15:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:50,541 INFO L470 AbstractCegarLoop]: Abstraction has 14920 states and 21895 transitions. [2021-12-15 11:15:50,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 11:15:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 14920 states and 21895 transitions. [2021-12-15 11:15:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:15:50,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:50,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:15:50,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:15:50,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1165253064, now seen corresponding path program 1 times [2021-12-15 11:15:50,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:50,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803862410] [2021-12-15 11:15:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:50,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:50,589 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 11:15:50,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:50,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803862410] [2021-12-15 11:15:50,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803862410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:15:50,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:15:50,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:15:50,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648368853] [2021-12-15 11:15:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:15:50,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:15:50,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:15:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:15:50,592 INFO L87 Difference]: Start difference. First operand 14920 states and 21895 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 11:15:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:15:51,308 INFO L93 Difference]: Finished difference Result 36446 states and 53547 transitions. [2021-12-15 11:15:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:15:51,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-15 11:15:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:15:51,345 INFO L225 Difference]: With dead ends: 36446 [2021-12-15 11:15:51,346 INFO L226 Difference]: Without dead ends: 21564 [2021-12-15 11:15:51,363 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 11:15:51,364 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 89 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 294 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 11:15:51,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 294 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:15:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21564 states. [2021-12-15 11:15:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21564 to 21418. [2021-12-15 11:15:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21418 states, 21417 states have (on average 1.4594481019750665) internal successors, (31257), 21417 states have internal predecessors, (31257), 0 states have call successors, (0), 0 states 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 11:15:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21418 states to 21418 states and 31257 transitions. [2021-12-15 11:15:52,232 INFO L78 Accepts]: Start accepts. Automaton has 21418 states and 31257 transitions. Word has length 72 [2021-12-15 11:15:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:15:52,232 INFO L470 AbstractCegarLoop]: Abstraction has 21418 states and 31257 transitions. [2021-12-15 11:15:52,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 11:15:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21418 states and 31257 transitions. [2021-12-15 11:15:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-15 11:15:52,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:15:52,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:52,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:15:52,245 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:15:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:15:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1893321424, now seen corresponding path program 1 times [2021-12-15 11:15:52,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:15:52,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027993444] [2021-12-15 11:15:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:52,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:15:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:15:52,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:15:52,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027993444] [2021-12-15 11:15:52,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027993444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:15:52,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677321884] [2021-12-15 11:15:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:15:52,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:15:52,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:15:52,483 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 11:15:52,484 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 11:15:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:15:52,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 11:15:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:15:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:15:53,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:15:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:15:53,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677321884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:15:53,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:15:53,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-15 11:15:53,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082965937] [2021-12-15 11:15:53,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:15:53,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 11:15:53,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:15:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 11:15:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-15 11:15:53,329 INFO L87 Difference]: Start difference. First operand 21418 states and 31257 transitions. Second operand has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 11:16:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:05,186 INFO L93 Difference]: Finished difference Result 281370 states and 409511 transitions. [2021-12-15 11:16:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-15 11:16:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 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 101 [2021-12-15 11:16:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:06,135 INFO L225 Difference]: With dead ends: 281370 [2021-12-15 11:16:06,135 INFO L226 Difference]: Without dead ends: 260600 [2021-12-15 11:16:06,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1857, Invalid=7455, Unknown=0, NotChecked=0, Total=9312 [2021-12-15 11:16:06,235 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 8636 mSDsluCounter, 3658 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8636 SdHoareTripleChecker+Valid, 4333 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:06,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8636 Valid, 4333 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 11:16:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260600 states. [2021-12-15 11:16:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260600 to 146770. [2021-12-15 11:16:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146770 states, 146769 states have (on average 1.4430635897226254) internal successors, (211797), 146769 states have internal predecessors, (211797), 0 states have call successors, (0), 0 states 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 11:16:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146770 states to 146770 states and 211797 transitions. [2021-12-15 11:16:13,227 INFO L78 Accepts]: Start accepts. Automaton has 146770 states and 211797 transitions. Word has length 101 [2021-12-15 11:16:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:13,227 INFO L470 AbstractCegarLoop]: Abstraction has 146770 states and 211797 transitions. [2021-12-15 11:16:13,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 11:16:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 146770 states and 211797 transitions. [2021-12-15 11:16:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-15 11:16:13,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:13,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:13,269 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 11:16:13,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 11:16:13,460 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash 467391681, now seen corresponding path program 1 times [2021-12-15 11:16:13,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:13,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154956137] [2021-12-15 11:16:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:13,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:13,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154956137] [2021-12-15 11:16:13,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154956137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:13,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:13,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:13,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278169973] [2021-12-15 11:16:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:13,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:13,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:13,509 INFO L87 Difference]: Start difference. First operand 146770 states and 211797 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 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 11:16:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:20,001 INFO L93 Difference]: Finished difference Result 315430 states and 455515 transitions. [2021-12-15 11:16:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:20,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 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) Word has length 101 [2021-12-15 11:16:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:20,616 INFO L225 Difference]: With dead ends: 315430 [2021-12-15 11:16:20,616 INFO L226 Difference]: Without dead ends: 219632 [2021-12-15 11:16:20,723 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 11:16:20,724 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 90 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:20,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 353 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219632 states.