./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sanfoundry_10_ground.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 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 20:34:00,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 20:34:00,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 20:34:00,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 20:34:00,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 20:34:00,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 20:34:00,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 20:34:00,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 20:34:00,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 20:34:00,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 20:34:00,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 20:34:00,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 20:34:00,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 20:34:00,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 20:34:00,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 20:34:00,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 20:34:00,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 20:34:00,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 20:34:00,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 20:34:00,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 20:34:00,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 20:34:00,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 20:34:00,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 20:34:00,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 20:34:00,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 20:34:00,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 20:34:00,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 20:34:00,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 20:34:00,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 20:34:00,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 20:34:00,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 20:34:00,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 20:34:00,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 20:34:00,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 20:34:00,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 20:34:00,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 20:34:00,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 20:34:00,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 20:34:00,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 20:34:00,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 20:34:00,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 20:34:00,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 20:34:00,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 20:34:00,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 20:34:00,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 20:34:00,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 20:34:00,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 20:34:00,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 20:34:00,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 20:34:00,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 20:34:00,454 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 20:34:00,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 20:34:00,455 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 20:34:00,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 20:34:00,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 20:34:00,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 20:34:00,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 20:34:00,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 20:34:00,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 20:34:00,456 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 20:34:00,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 20:34:00,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 20:34:00,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 20:34:00,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 20:34:00,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 20:34:00,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 20:34:00,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 20:34:00,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 20:34:00,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 20:34:00,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 20:34:00,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 20:34:00,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 20:34:00,458 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 20:34:00,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 20:34:00,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 20:34:00,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 20:34:00,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 [2021-12-16 20:34:00,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 20:34:00,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 20:34:00,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 20:34:00,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 20:34:00,701 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 20:34:00,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2021-12-16 20:34:00,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2cd9ac3/8b4e48f3221c42fb86f465bd36508002/FLAG90e90261b [2021-12-16 20:34:01,112 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 20:34:01,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2021-12-16 20:34:01,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2cd9ac3/8b4e48f3221c42fb86f465bd36508002/FLAG90e90261b [2021-12-16 20:34:01,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2cd9ac3/8b4e48f3221c42fb86f465bd36508002 [2021-12-16 20:34:01,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 20:34:01,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 20:34:01,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 20:34:01,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 20:34:01,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 20:34:01,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b0e0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01, skipping insertion in model container [2021-12-16 20:34:01,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 20:34:01,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 20:34:01,232 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/array-examples/sanfoundry_10_ground.c[324,337] [2021-12-16 20:34:01,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 20:34:01,251 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 20:34:01,261 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/array-examples/sanfoundry_10_ground.c[324,337] [2021-12-16 20:34:01,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 20:34:01,273 INFO L208 MainTranslator]: Completed translation [2021-12-16 20:34:01,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01 WrapperNode [2021-12-16 20:34:01,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 20:34:01,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 20:34:01,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 20:34:01,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 20:34:01,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,315 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2021-12-16 20:34:01,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 20:34:01,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 20:34:01,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 20:34:01,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 20:34:01,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 20:34:01,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 20:34:01,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 20:34:01,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 20:34:01,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (1/1) ... [2021-12-16 20:34:01,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 20:34:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:01,356 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) [2021-12-16 20:34:01,377 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 [2021-12-16 20:34:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 20:34:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 20:34:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 20:34:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 20:34:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 20:34:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 20:34:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 20:34:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 20:34:01,427 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 20:34:01,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 20:34:01,531 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 20:34:01,535 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 20:34:01,537 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 20:34:01,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:34:01 BoogieIcfgContainer [2021-12-16 20:34:01,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 20:34:01,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 20:34:01,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 20:34:01,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 20:34:01,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 08:34:01" (1/3) ... [2021-12-16 20:34:01,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d400142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:34:01, skipping insertion in model container [2021-12-16 20:34:01,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 08:34:01" (2/3) ... [2021-12-16 20:34:01,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d400142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 08:34:01, skipping insertion in model container [2021-12-16 20:34:01,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 08:34:01" (3/3) ... [2021-12-16 20:34:01,552 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2021-12-16 20:34:01,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 20:34:01,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 20:34:01,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 20:34:01,609 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 [2021-12-16 20:34:01,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 20:34:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 20:34:01,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:01,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:01,639 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:01,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2044605464, now seen corresponding path program 1 times [2021-12-16 20:34:01,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:01,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566100750] [2021-12-16 20:34:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:01,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 20:34:01,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:01,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566100750] [2021-12-16 20:34:01,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566100750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 20:34:01,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 20:34:01,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 20:34:01,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666890872] [2021-12-16 20:34:01,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 20:34:01,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 20:34:01,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 20:34:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 20:34:01,838 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:01,885 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-12-16 20:34:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 20:34:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-16 20:34:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:01,899 INFO L225 Difference]: With dead ends: 42 [2021-12-16 20:34:01,899 INFO L226 Difference]: Without dead ends: 20 [2021-12-16 20:34:01,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 20:34:01,903 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:01,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-16 20:34:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-16 20:34:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-16 20:34:01,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-12-16 20:34:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:01,934 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-16 20:34:01,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-16 20:34:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 20:34:01,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:01,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:01,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 20:34:01,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1280243605, now seen corresponding path program 1 times [2021-12-16 20:34:01,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:01,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079134200] [2021-12-16 20:34:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:01,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:02,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:02,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079134200] [2021-12-16 20:34:02,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079134200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 20:34:02,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 20:34:02,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 20:34:02,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945481907] [2021-12-16 20:34:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 20:34:02,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 20:34:02,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 20:34:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 20:34:02,003 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:02,046 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-12-16 20:34:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 20:34:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-16 20:34:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:02,050 INFO L225 Difference]: With dead ends: 38 [2021-12-16 20:34:02,051 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 20:34:02,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 20:34:02,056 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:02,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 20:34:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-12-16 20:34:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-12-16 20:34:02,064 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2021-12-16 20:34:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:02,066 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-12-16 20:34:02,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-12-16 20:34:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 20:34:02,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:02,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 20:34:02,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1442235305, now seen corresponding path program 1 times [2021-12-16 20:34:02,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:02,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605032971] [2021-12-16 20:34:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:02,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:02,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605032971] [2021-12-16 20:34:02,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605032971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 20:34:02,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 20:34:02,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 20:34:02,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408121524] [2021-12-16 20:34:02,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 20:34:02,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 20:34:02,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 20:34:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 20:34:02,135 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:02,143 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-12-16 20:34:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 20:34:02,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-16 20:34:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:02,144 INFO L225 Difference]: With dead ends: 34 [2021-12-16 20:34:02,144 INFO L226 Difference]: Without dead ends: 21 [2021-12-16 20:34:02,145 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 [2021-12-16 20:34:02,146 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:02,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-16 20:34:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-16 20:34:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-16 20:34:02,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2021-12-16 20:34:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-16 20:34:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-16 20:34:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 20:34:02,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:02,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:02,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 20:34:02,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2093661559, now seen corresponding path program 1 times [2021-12-16 20:34:02,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810137816] [2021-12-16 20:34:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:02,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:02,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:02,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810137816] [2021-12-16 20:34:02,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810137816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:02,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611774742] [2021-12-16 20:34:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:02,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:02,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:02,255 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) [2021-12-16 20:34:02,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 20:34:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:02,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 20:34:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:02,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 20:34:02,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611774742] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:02,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:02,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-16 20:34:02,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564214005] [2021-12-16 20:34:02,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:02,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 20:34:02,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 20:34:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-16 20:34:02,436 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:02,620 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-12-16 20:34:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 20:34:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 16 [2021-12-16 20:34:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:02,625 INFO L225 Difference]: With dead ends: 84 [2021-12-16 20:34:02,625 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 20:34:02,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-12-16 20:34:02,633 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:02,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 86 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 20:34:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 20:34:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 37. [2021-12-16 20:34:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-16 20:34:02,664 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 16 [2021-12-16 20:34:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:02,664 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-16 20:34:02,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-16 20:34:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 20:34:02,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:02,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:02,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:02,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:02,883 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:02,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:02,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1674724175, now seen corresponding path program 1 times [2021-12-16 20:34:02,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:02,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932252932] [2021-12-16 20:34:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:02,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 20:34:03,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932252932] [2021-12-16 20:34:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932252932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713019972] [2021-12-16 20:34:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:03,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:03,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:34:03,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 20:34:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:03,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 20:34:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 20:34:03,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 20:34:03,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713019972] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:03,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:03,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-16 20:34:03,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733481208] [2021-12-16 20:34:03,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:03,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 20:34:03,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 20:34:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2021-12-16 20:34:03,284 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:03,346 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-12-16 20:34:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 20:34:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 20:34:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:03,349 INFO L225 Difference]: With dead ends: 83 [2021-12-16 20:34:03,349 INFO L226 Difference]: Without dead ends: 57 [2021-12-16 20:34:03,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2021-12-16 20:34:03,350 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:03,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 80 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 20:34:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-16 20:34:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2021-12-16 20:34:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-12-16 20:34:03,369 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 25 [2021-12-16 20:34:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:03,369 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-12-16 20:34:03,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-12-16 20:34:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 20:34:03,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:03,372 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:03,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:03,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:03,582 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash 674415525, now seen corresponding path program 2 times [2021-12-16 20:34:03,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:03,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217405482] [2021-12-16 20:34:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:03,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 20:34:03,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:03,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217405482] [2021-12-16 20:34:03,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217405482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:03,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171109848] [2021-12-16 20:34:03,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 20:34:03,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:03,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:03,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:34:03,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 20:34:03,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 20:34:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:03,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 20:34:03,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 20:34:03,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 20:34:04,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171109848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:04,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:04,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2021-12-16 20:34:04,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686632664] [2021-12-16 20:34:04,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:04,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 20:34:04,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 20:34:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 20:34:04,212 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:04,301 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-12-16 20:34:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 20:34:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 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 37 [2021-12-16 20:34:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:04,304 INFO L225 Difference]: With dead ends: 107 [2021-12-16 20:34:04,304 INFO L226 Difference]: Without dead ends: 81 [2021-12-16 20:34:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 20:34:04,306 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:04,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 20:34:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-16 20:34:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-12-16 20:34:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-12-16 20:34:04,314 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 37 [2021-12-16 20:34:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:04,315 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-12-16 20:34:04,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-12-16 20:34:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 20:34:04,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:04,317 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:04,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:04,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:04,532 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1755146125, now seen corresponding path program 3 times [2021-12-16 20:34:04,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:04,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536753215] [2021-12-16 20:34:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:04,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 20:34:04,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:04,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536753215] [2021-12-16 20:34:04,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536753215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:04,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442772062] [2021-12-16 20:34:04,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 20:34:04,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:04,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:04,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:34:04,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 20:34:04,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 20:34:04,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 20:34:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-16 20:34:05,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-16 20:34:05,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442772062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:05,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:05,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2021-12-16 20:34:05,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193867594] [2021-12-16 20:34:05,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:05,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 20:34:05,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 20:34:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=632, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 20:34:05,325 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:07,056 INFO L93 Difference]: Finished difference Result 317 states and 378 transitions. [2021-12-16 20:34:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-16 20:34:07,056 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 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 61 [2021-12-16 20:34:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:07,058 INFO L225 Difference]: With dead ends: 317 [2021-12-16 20:34:07,058 INFO L226 Difference]: Without dead ends: 291 [2021-12-16 20:34:07,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3510, Invalid=7410, Unknown=0, NotChecked=0, Total=10920 [2021-12-16 20:34:07,063 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 597 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:07,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 100 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 20:34:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-16 20:34:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 196. [2021-12-16 20:34:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2021-12-16 20:34:07,107 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 61 [2021-12-16 20:34:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:07,107 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2021-12-16 20:34:07,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2021-12-16 20:34:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 20:34:07,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:07,109 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:07,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:07,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:07,332 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 842992325, now seen corresponding path program 1 times [2021-12-16 20:34:07,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113616872] [2021-12-16 20:34:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:07,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 20:34:07,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:07,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113616872] [2021-12-16 20:34:07,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113616872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:07,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154046365] [2021-12-16 20:34:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:07,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:07,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:07,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:34:07,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 20:34:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:07,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 20:34:07,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 20:34:08,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 20:34:09,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154046365] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:09,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:09,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 80 [2021-12-16 20:34:09,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738333186] [2021-12-16 20:34:09,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:09,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-16 20:34:09,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-16 20:34:09,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 20:34:09,101 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:09,309 INFO L93 Difference]: Finished difference Result 402 states and 485 transitions. [2021-12-16 20:34:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 20:34:09,310 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 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 [2021-12-16 20:34:09,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:09,312 INFO L225 Difference]: With dead ends: 402 [2021-12-16 20:34:09,312 INFO L226 Difference]: Without dead ends: 259 [2021-12-16 20:34:09,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2860, Invalid=3460, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 20:34:09,314 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:09,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 86 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 20:34:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-16 20:34:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 250. [2021-12-16 20:34:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1164658634538152) internal successors, (278), 249 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) [2021-12-16 20:34:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2021-12-16 20:34:09,329 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 72 [2021-12-16 20:34:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:09,330 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2021-12-16 20:34:09,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2021-12-16 20:34:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-16 20:34:09,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:09,332 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:09,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 20:34:09,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:09,548 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1201235067, now seen corresponding path program 2 times [2021-12-16 20:34:09,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360090770] [2021-12-16 20:34:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:09,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 20:34:10,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:10,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360090770] [2021-12-16 20:34:10,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360090770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:10,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220553927] [2021-12-16 20:34:10,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 20:34:10,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:10,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:10,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:34:10,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 20:34:10,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 20:34:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:10,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-16 20:34:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 20:34:12,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 20:34:15,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220553927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:34:15,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:34:15,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 161 [2021-12-16 20:34:15,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928520837] [2021-12-16 20:34:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:34:15,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2021-12-16 20:34:15,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:34:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-12-16 20:34:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2021-12-16 20:34:15,044 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:15,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:34:15,366 INFO L93 Difference]: Finished difference Result 510 states and 620 transitions. [2021-12-16 20:34:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-16 20:34:15,367 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 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 126 [2021-12-16 20:34:15,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:34:15,368 INFO L225 Difference]: With dead ends: 510 [2021-12-16 20:34:15,368 INFO L226 Difference]: Without dead ends: 367 [2021-12-16 20:34:15,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11075 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11554, Invalid=14206, Unknown=0, NotChecked=0, Total=25760 [2021-12-16 20:34:15,372 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 20:34:15,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 68 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 20:34:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-16 20:34:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 358. [2021-12-16 20:34:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.0812324929971988) internal successors, (386), 357 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 386 transitions. [2021-12-16 20:34:15,381 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 386 transitions. Word has length 126 [2021-12-16 20:34:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:34:15,382 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 386 transitions. [2021-12-16 20:34:15,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 161 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:34:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 386 transitions. [2021-12-16 20:34:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-16 20:34:15,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:34:15,384 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:34:15,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 20:34:15,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:15,600 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:34:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:34:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1368520089, now seen corresponding path program 3 times [2021-12-16 20:34:15,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:34:15,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135971207] [2021-12-16 20:34:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:34:15,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:34:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:34:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 20:34:19,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:34:19,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135971207] [2021-12-16 20:34:19,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135971207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:34:19,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74630063] [2021-12-16 20:34:19,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 20:34:19,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:34:19,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:34:19,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:34:19,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 20:34:19,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 20:34:19,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:34:19,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 20:34:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:34:20,488 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-16 20:34:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-12-16 20:34:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11243 trivial. 0 not checked. [2021-12-16 20:34:20,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:34:23,109 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 2) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_932 Int)) (not (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_932) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))))) is different from false [2021-12-16 20:35:04,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-16 20:35:04,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 20:35:04,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2021-12-16 20:35:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11249 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11243 trivial. 6 not checked. [2021-12-16 20:35:04,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74630063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:35:04,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:35:04,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 11, 11] total 126 [2021-12-16 20:35:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851696197] [2021-12-16 20:35:04,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:35:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-16 20:35:04,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:35:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-16 20:35:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6285, Invalid=9107, Unknown=112, NotChecked=246, Total=15750 [2021-12-16 20:35:04,919 INFO L87 Difference]: Start difference. First operand 358 states and 386 transitions. Second operand has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:35:12,301 WARN L838 $PredicateComparison]: unable to prove that (and (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= 0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 2) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_932 Int)) (not (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_932) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))))) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))) is different from false [2021-12-16 20:35:14,308 WARN L838 $PredicateComparison]: unable to prove that (and (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= 0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 2) |c_ULTIMATE.start_main_~n~0#1|) (forall ((v_ArrVal_932 Int)) (not (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_932) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))))) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|))) is different from false [2021-12-16 20:35:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:35:14,618 INFO L93 Difference]: Finished difference Result 548 states and 612 transitions. [2021-12-16 20:35:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-16 20:35:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 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 234 [2021-12-16 20:35:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:35:14,620 INFO L225 Difference]: With dead ends: 548 [2021-12-16 20:35:14,620 INFO L226 Difference]: Without dead ends: 405 [2021-12-16 20:35:14,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 450 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 8144 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=19234, Invalid=37546, Unknown=114, NotChecked=1428, Total=58322 [2021-12-16 20:35:14,626 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 424 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 20:35:14,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 101 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 409 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2021-12-16 20:35:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-16 20:35:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 378. [2021-12-16 20:35:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.0928381962864722) internal successors, (412), 377 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:35:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 412 transitions. [2021-12-16 20:35:14,645 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 412 transitions. Word has length 234 [2021-12-16 20:35:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:35:14,645 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 412 transitions. [2021-12-16 20:35:14,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.111111111111111) internal successors, (266), 126 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:35:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 412 transitions. [2021-12-16 20:35:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-16 20:35:14,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:35:14,649 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:35:14,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 20:35:14,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:35:14,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:35:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:35:14,867 INFO L85 PathProgramCache]: Analyzing trace with hash 763782623, now seen corresponding path program 1 times [2021-12-16 20:35:14,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:35:14,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545889928] [2021-12-16 20:35:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:35:14,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:35:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:35:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 20:35:18,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:35:18,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545889928] [2021-12-16 20:35:18,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545889928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:35:18,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77891001] [2021-12-16 20:35:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:35:18,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:35:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:35:18,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:35:18,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 20:35:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:35:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-16 20:35:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:35:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 20:35:23,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:35:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11464 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 20:35:34,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77891001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:35:34,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:35:34,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 326 [2021-12-16 20:35:34,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205690338] [2021-12-16 20:35:34,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:35:34,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 326 states [2021-12-16 20:35:34,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:35:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 326 interpolants. [2021-12-16 20:35:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47304, Invalid=58646, Unknown=0, NotChecked=0, Total=105950 [2021-12-16 20:35:34,948 INFO L87 Difference]: Start difference. First operand 378 states and 412 transitions. Second operand has 326 states, 326 states have (on average 2.042944785276074) internal successors, (666), 326 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:35:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:35:36,210 INFO L93 Difference]: Finished difference Result 753 states and 925 transitions. [2021-12-16 20:35:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-12-16 20:35:36,211 INFO L78 Accepts]: Start accepts. Automaton has has 326 states, 326 states have (on average 2.042944785276074) internal successors, (666), 326 states have internal predecessors, (666), 0 states have call successors, (0), 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 240 [2021-12-16 20:35:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:35:36,213 INFO L225 Difference]: With dead ends: 753 [2021-12-16 20:35:36,213 INFO L226 Difference]: Without dead ends: 596 [2021-12-16 20:35:36,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46330 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=47304, Invalid=58646, Unknown=0, NotChecked=0, Total=105950 [2021-12-16 20:35:36,218 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 20:35:36,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 103 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 20:35:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-16 20:35:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 589. [2021-12-16 20:35:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.0561224489795917) internal successors, (621), 588 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:35:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 621 transitions. [2021-12-16 20:35:36,232 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 621 transitions. Word has length 240 [2021-12-16 20:35:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:35:36,232 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 621 transitions. [2021-12-16 20:35:36,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 326 states, 326 states have (on average 2.042944785276074) internal successors, (666), 326 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:35:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 621 transitions. [2021-12-16 20:35:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-16 20:35:36,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:35:36,237 INFO L514 BasicCegarLoop]: trace histogram [216, 216, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:35:36,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 20:35:36,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 20:35:36,451 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:35:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:35:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash 654572729, now seen corresponding path program 2 times [2021-12-16 20:35:36,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:35:36,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929677085] [2021-12-16 20:35:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:35:36,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:35:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:35:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 46671 backedges. 0 proven. 46656 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 20:35:51,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:35:51,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929677085] [2021-12-16 20:35:51,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929677085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:35:51,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149363092] [2021-12-16 20:35:51,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 20:35:51,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:35:51,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:35:51,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:35:51,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 20:35:51,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 20:35:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:35:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 219 conjunts are in the unsatisfiable core [2021-12-16 20:35:51,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:36:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46671 backedges. 0 proven. 46656 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 20:36:08,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:36:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 46671 backedges. 0 proven. 46656 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 20:36:53,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149363092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:36:53,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:36:53,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [219, 219, 219] total 653 [2021-12-16 20:36:53,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051809021] [2021-12-16 20:36:53,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:36:53,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 653 states [2021-12-16 20:36:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:36:53,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 653 interpolants. [2021-12-16 20:36:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189658, Invalid=236098, Unknown=0, NotChecked=0, Total=425756 [2021-12-16 20:36:53,349 INFO L87 Difference]: Start difference. First operand 589 states and 621 transitions. Second operand has 653 states, 653 states have (on average 2.021439509954058) internal successors, (1320), 653 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:37:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 20:37:01,733 INFO L93 Difference]: Finished difference Result 1186 states and 1467 transitions. [2021-12-16 20:37:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 436 states. [2021-12-16 20:37:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 653 states, 653 states have (on average 2.021439509954058) internal successors, (1320), 653 states have internal predecessors, (1320), 0 states have call successors, (0), 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 458 [2021-12-16 20:37:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 20:37:01,739 INFO L225 Difference]: With dead ends: 1186 [2021-12-16 20:37:01,739 INFO L226 Difference]: Without dead ends: 1032 [2021-12-16 20:37:01,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 651 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187703 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=189658, Invalid=236098, Unknown=0, NotChecked=0, Total=425756 [2021-12-16 20:37:01,768 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 661 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 20:37:01,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 60 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 20:37:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-12-16 20:37:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1025. [2021-12-16 20:37:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.0322265625) internal successors, (1057), 1024 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:37:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1057 transitions. [2021-12-16 20:37:01,797 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1057 transitions. Word has length 458 [2021-12-16 20:37:01,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 20:37:01,798 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1057 transitions. [2021-12-16 20:37:01,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 653 states, 653 states have (on average 2.021439509954058) internal successors, (1320), 653 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 20:37:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1057 transitions. [2021-12-16 20:37:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2021-12-16 20:37:01,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 20:37:01,818 INFO L514 BasicCegarLoop]: trace histogram [434, 434, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 20:37:01,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 20:37:02,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:37:02,035 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 20:37:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 20:37:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 325960941, now seen corresponding path program 3 times [2021-12-16 20:37:02,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 20:37:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934326921] [2021-12-16 20:37:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 20:37:02,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 20:37:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 20:38:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 188371 backedges. 0 proven. 188356 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 20:38:02,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 20:38:02,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934326921] [2021-12-16 20:38:02,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934326921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 20:38:02,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695440376] [2021-12-16 20:38:02,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 20:38:02,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 20:38:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 20:38:02,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 20:38:02,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 20:38:02,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 20:38:02,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 20:38:02,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 20:38:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 20:38:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 188371 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 188358 trivial. 0 not checked. [2021-12-16 20:38:04,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 20:38:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 188371 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 188358 trivial. 0 not checked. [2021-12-16 20:38:06,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695440376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 20:38:06,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 20:38:06,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [437, 8, 8] total 449 [2021-12-16 20:38:06,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970601604] [2021-12-16 20:38:06,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 20:38:06,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 449 states [2021-12-16 20:38:06,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 20:38:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 449 interpolants. [2021-12-16 20:38:06,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98809, Invalid=102343, Unknown=0, NotChecked=0, Total=201152 [2021-12-16 20:38:06,707 INFO L87 Difference]: Start difference. First operand 1025 states and 1057 transitions. Second operand has 449 states, 449 states have (on average 2.062360801781737) internal successors, (926), 449 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15