./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.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 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:00:17,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:00:17,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:00:17,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:00:17,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:00:17,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:00:17,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:00:17,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:00:17,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:00:17,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:00:17,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:00:17,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:00:17,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:00:17,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:00:17,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:00:17,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:00:17,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:00:17,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:00:17,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:00:17,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:00:17,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:00:17,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:00:17,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:00:17,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:00:17,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:00:17,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:00:17,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:00:17,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:00:17,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:00:17,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:00:17,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:00:17,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:00:17,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:00:17,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:00:17,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:00:17,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:00:17,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:00:17,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:00:17,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:00:17,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:00:17,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:00:17,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:00:17,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:00:17,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:00:17,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:00:17,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:00:17,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:00:17,426 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:00:17,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:00:17,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:00:17,427 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:00:17,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:00:17,428 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:00:17,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:00:17,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:00:17,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:00:17,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:00:17,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:00:17,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:00:17,429 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:00:17,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:00:17,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:00:17,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:00:17,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:00:17,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:00:17,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:00:17,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:00:17,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:00:17,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:00:17,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:00:17,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:00:17,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:00:17,435 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:00:17,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:00:17,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:00:17,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 [2021-12-28 01:00:17,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:00:17,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:00:17,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:00:17,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:00:17,695 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:00:17,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2021-12-28 01:00:17,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f688ff2/1c42c603abb2467483ac9acf0e2b0c07/FLAG1f2909e4d [2021-12-28 01:00:18,106 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:00:18,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2021-12-28 01:00:18,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f688ff2/1c42c603abb2467483ac9acf0e2b0c07/FLAG1f2909e4d [2021-12-28 01:00:18,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f688ff2/1c42c603abb2467483ac9acf0e2b0c07 [2021-12-28 01:00:18,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:00:18,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:00:18,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:00:18,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:00:18,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:00:18,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416616e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18, skipping insertion in model container [2021-12-28 01:00:18,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:00:18,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:00:18,279 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/recursive-simple/fibo_2calls_4-1.c[946,959] [2021-12-28 01:00:18,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:00:18,288 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:00:18,300 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/recursive-simple/fibo_2calls_4-1.c[946,959] [2021-12-28 01:00:18,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:00:18,312 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:00:18,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18 WrapperNode [2021-12-28 01:00:18,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:00:18,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:00:18,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:00:18,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:00:18,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,358 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-28 01:00:18,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:00:18,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:00:18,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:00:18,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:00:18,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:00:18,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:00:18,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:00:18,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:00:18,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (1/1) ... [2021-12-28 01:00:18,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:00:18,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:18,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:00:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:00:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:00:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:00:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-28 01:00:18,421 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-28 01:00:18,421 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-28 01:00:18,421 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-28 01:00:18,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:00:18,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:00:18,459 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:00:18,461 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:00:18,546 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:00:18,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:00:18,550 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:00:18,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:00:18 BoogieIcfgContainer [2021-12-28 01:00:18,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:00:18,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:00:18,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:00:18,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:00:18,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:00:18" (1/3) ... [2021-12-28 01:00:18,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc8cb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:00:18, skipping insertion in model container [2021-12-28 01:00:18,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:00:18" (2/3) ... [2021-12-28 01:00:18,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc8cb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:00:18, skipping insertion in model container [2021-12-28 01:00:18,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:00:18" (3/3) ... [2021-12-28 01:00:18,593 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2021-12-28 01:00:18,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:00:18,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:00:18,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:00:18,651 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:00:18,652 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:00:18,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 01:00:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 01:00:18,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:18,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:18,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-12-28 01:00:18,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:18,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649034652] [2021-12-28 01:00:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:18,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:00:18,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:18,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649034652] [2021-12-28 01:00:18,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649034652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:00:18,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:00:18,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:00:18,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850345679] [2021-12-28 01:00:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:00:18,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:00:18,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:18,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:00:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:00:18,909 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 01:00:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:18,974 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-12-28 01:00:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:00:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-28 01:00:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:18,984 INFO L225 Difference]: With dead ends: 39 [2021-12-28 01:00:18,985 INFO L226 Difference]: Without dead ends: 27 [2021-12-28 01:00:18,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:00:18,990 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:18,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:00:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-28 01:00:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-28 01:00:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-28 01:00:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-28 01:00:19,036 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-12-28 01:00:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:19,037 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-28 01:00:19,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 01:00:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-28 01:00:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 01:00:19,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:19,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:19,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:00:19,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-12-28 01:00:19,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:19,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697863941] [2021-12-28 01:00:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:19,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:19,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:00:19,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697863941] [2021-12-28 01:00:19,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697863941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:00:19,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:00:19,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:00:19,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535735135] [2021-12-28 01:00:19,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:00:19,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:00:19,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:00:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:00:19,093 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 01:00:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:19,150 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-12-28 01:00:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:00:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-28 01:00:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:19,152 INFO L225 Difference]: With dead ends: 33 [2021-12-28 01:00:19,152 INFO L226 Difference]: Without dead ends: 29 [2021-12-28 01:00:19,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:00:19,153 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:19,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:00:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-28 01:00:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-28 01:00:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-28 01:00:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-28 01:00:19,158 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-12-28 01:00:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:19,159 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-28 01:00:19,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 01:00:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-28 01:00:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-28 01:00:19,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:19,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:19,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:00:19,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-12-28 01:00:19,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115084475] [2021-12-28 01:00:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:19,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:19,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:19,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 01:00:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:00:19,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115084475] [2021-12-28 01:00:19,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115084475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512596920] [2021-12-28 01:00:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:19,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:19,272 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) [2021-12-28 01:00:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:00:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:00:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:00:19,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:00:19,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512596920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:19,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:19,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-12-28 01:00:19,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703961401] [2021-12-28 01:00:19,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:19,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 01:00:19,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 01:00:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:00:19,684 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 01:00:19,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:19,803 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-12-28 01:00:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:00:19,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-12-28 01:00:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:19,805 INFO L225 Difference]: With dead ends: 55 [2021-12-28 01:00:19,805 INFO L226 Difference]: Without dead ends: 31 [2021-12-28 01:00:19,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:00:19,807 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:19,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 136 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:00:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-28 01:00:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-12-28 01:00:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-28 01:00:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-28 01:00:19,818 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-12-28 01:00:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:19,818 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-28 01:00:19,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 01:00:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-28 01:00:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 01:00:19,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:19,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:19,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 01:00:20,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:20,037 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-12-28 01:00:20,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702451793] [2021-12-28 01:00:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:20,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:00:20,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:20,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702451793] [2021-12-28 01:00:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702451793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:20,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202836409] [2021-12-28 01:00:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:20,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:20,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:20,182 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) [2021-12-28 01:00:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:00:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:20,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:00:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:00:20,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:00:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202836409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:20,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:20,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-12-28 01:00:20,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140631367] [2021-12-28 01:00:20,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:20,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 01:00:20,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 01:00:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:00:20,447 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 01:00:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:20,553 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-12-28 01:00:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:00:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-12-28 01:00:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:20,556 INFO L225 Difference]: With dead ends: 51 [2021-12-28 01:00:20,556 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 01:00:20,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:00:20,557 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:20,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 110 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:00:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 01:00:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-28 01:00:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-28 01:00:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-12-28 01:00:20,564 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-12-28 01:00:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:20,564 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-12-28 01:00:20,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 01:00:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-12-28 01:00:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 01:00:20,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:20,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:20,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:20,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-28 01:00:20,788 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-12-28 01:00:20,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995268048] [2021-12-28 01:00:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:20,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 01:00:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 01:00:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 01:00:20,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995268048] [2021-12-28 01:00:20,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995268048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830978646] [2021-12-28 01:00:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:20,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:20,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:20,888 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) [2021-12-28 01:00:20,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 01:00:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 01:00:20,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 01:00:21,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:00:21,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830978646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:21,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:21,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-12-28 01:00:21,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339062375] [2021-12-28 01:00:21,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:21,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 01:00:21,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 01:00:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:00:21,312 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-28 01:00:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:21,503 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-12-28 01:00:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 01:00:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-12-28 01:00:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:21,504 INFO L225 Difference]: With dead ends: 105 [2021-12-28 01:00:21,504 INFO L226 Difference]: Without dead ends: 63 [2021-12-28 01:00:21,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-28 01:00:21,508 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:21,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:00:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-28 01:00:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-28 01:00:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-12-28 01:00:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-12-28 01:00:21,518 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-12-28 01:00:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-12-28 01:00:21,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-28 01:00:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-12-28 01:00:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 01:00:21,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:21,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:21,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:21,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:21,723 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-12-28 01:00:21,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:21,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718089470] [2021-12-28 01:00:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:21,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:21,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:21,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:21,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:21,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:21,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 01:00:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 01:00:21,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:21,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718089470] [2021-12-28 01:00:21,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718089470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:21,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286437708] [2021-12-28 01:00:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:21,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:21,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:21,836 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) [2021-12-28 01:00:21,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 01:00:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:21,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 01:00:21,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 01:00:21,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:00:22,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286437708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:22,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:22,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2021-12-28 01:00:22,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854864456] [2021-12-28 01:00:22,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:22,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 01:00:22,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:22,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 01:00:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:00:22,257 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-28 01:00:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:22,528 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-12-28 01:00:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 01:00:22,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) Word has length 37 [2021-12-28 01:00:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:22,530 INFO L225 Difference]: With dead ends: 177 [2021-12-28 01:00:22,530 INFO L226 Difference]: Without dead ends: 117 [2021-12-28 01:00:22,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-12-28 01:00:22,532 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:22,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 258 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:00:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-28 01:00:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-12-28 01:00:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-12-28 01:00:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-12-28 01:00:22,545 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-12-28 01:00:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:22,546 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-12-28 01:00:22,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-28 01:00:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-12-28 01:00:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-28 01:00:22,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:22,549 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:22,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:22,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:22,768 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:22,769 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-12-28 01:00:22,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:22,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751341285] [2021-12-28 01:00:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:22,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 01:00:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 01:00:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-28 01:00:22,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751341285] [2021-12-28 01:00:22,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751341285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768691860] [2021-12-28 01:00:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:22,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:22,874 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) [2021-12-28 01:00:22,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 01:00:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:22,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 01:00:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 01:00:23,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 01:00:23,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768691860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:23,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:23,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2021-12-28 01:00:23,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156510104] [2021-12-28 01:00:23,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:23,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 01:00:23,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 01:00:23,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:00:23,308 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2021-12-28 01:00:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:23,515 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2021-12-28 01:00:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:00:23,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 51 [2021-12-28 01:00:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:23,517 INFO L225 Difference]: With dead ends: 262 [2021-12-28 01:00:23,517 INFO L226 Difference]: Without dead ends: 162 [2021-12-28 01:00:23,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-12-28 01:00:23,519 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:23,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 218 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:00:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-28 01:00:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2021-12-28 01:00:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2021-12-28 01:00:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2021-12-28 01:00:23,541 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2021-12-28 01:00:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:23,542 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2021-12-28 01:00:23,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2021-12-28 01:00:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2021-12-28 01:00:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 01:00:23,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:23,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:23,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:23,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:23,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1130362923, now seen corresponding path program 1 times [2021-12-28 01:00:23,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:23,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517538345] [2021-12-28 01:00:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:23,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 01:00:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 01:00:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 01:00:23,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517538345] [2021-12-28 01:00:23,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517538345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:23,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806853319] [2021-12-28 01:00:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:23,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:23,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:23,887 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) [2021-12-28 01:00:23,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 01:00:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:23,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:00:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 01:00:24,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 01:00:24,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806853319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:24,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:24,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2021-12-28 01:00:24,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758181450] [2021-12-28 01:00:24,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:24,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 01:00:24,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 01:00:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:00:24,190 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 01:00:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:24,378 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2021-12-28 01:00:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 01:00:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 52 [2021-12-28 01:00:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:24,381 INFO L225 Difference]: With dead ends: 301 [2021-12-28 01:00:24,381 INFO L226 Difference]: Without dead ends: 98 [2021-12-28 01:00:24,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-12-28 01:00:24,383 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:24,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 200 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:00:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-28 01:00:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-12-28 01:00:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2021-12-28 01:00:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2021-12-28 01:00:24,409 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2021-12-28 01:00:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:24,409 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2021-12-28 01:00:24,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 01:00:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2021-12-28 01:00:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 01:00:24,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:24,413 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:24,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:24,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:24,615 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:24,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1087717907, now seen corresponding path program 2 times [2021-12-28 01:00:24,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612691654] [2021-12-28 01:00:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:24,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 01:00:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 01:00:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 01:00:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-28 01:00:24,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612691654] [2021-12-28 01:00:24,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612691654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593135929] [2021-12-28 01:00:24,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 01:00:24,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:24,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:24,845 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) [2021-12-28 01:00:24,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 01:00:24,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 01:00:24,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 01:00:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 01:00:24,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 01:00:25,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 01:00:25,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593135929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:25,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:25,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 11] total 24 [2021-12-28 01:00:25,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452982254] [2021-12-28 01:00:25,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:25,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 01:00:25,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 01:00:25,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-28 01:00:25,522 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2021-12-28 01:00:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:25,792 INFO L93 Difference]: Finished difference Result 179 states and 304 transitions. [2021-12-28 01:00:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 01:00:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) Word has length 79 [2021-12-28 01:00:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:25,794 INFO L225 Difference]: With dead ends: 179 [2021-12-28 01:00:25,794 INFO L226 Difference]: Without dead ends: 89 [2021-12-28 01:00:25,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 01:00:25,795 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:25,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 240 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:00:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-28 01:00:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-12-28 01:00:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (29), 17 states have call predecessors, (29), 14 states have call successors, (29) [2021-12-28 01:00:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2021-12-28 01:00:25,801 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 79 [2021-12-28 01:00:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:25,802 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2021-12-28 01:00:25,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2021-12-28 01:00:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2021-12-28 01:00:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 01:00:25,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:25,803 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:25,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:26,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:26,003 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 780870354, now seen corresponding path program 1 times [2021-12-28 01:00:26,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:26,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841801185] [2021-12-28 01:00:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:26,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 01:00:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 01:00:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-28 01:00:26,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:26,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841801185] [2021-12-28 01:00:26,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841801185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800262235] [2021-12-28 01:00:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:26,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:26,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:26,280 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) [2021-12-28 01:00:26,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 01:00:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-28 01:00:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-28 01:00:26,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-28 01:00:27,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800262235] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:27,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:27,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2021-12-28 01:00:27,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125876242] [2021-12-28 01:00:27,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:27,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 01:00:27,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:27,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 01:00:27,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-12-28 01:00:27,008 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 01:00:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:27,104 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-12-28 01:00:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 01:00:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 65 [2021-12-28 01:00:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:27,106 INFO L225 Difference]: With dead ends: 91 [2021-12-28 01:00:27,106 INFO L226 Difference]: Without dead ends: 87 [2021-12-28 01:00:27,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-12-28 01:00:27,108 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:27,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 661 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:00:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-28 01:00:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-12-28 01:00:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (26), 15 states have call predecessors, (26), 13 states have call successors, (26) [2021-12-28 01:00:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2021-12-28 01:00:27,114 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 65 [2021-12-28 01:00:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:27,115 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2021-12-28 01:00:27,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 01:00:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2021-12-28 01:00:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 01:00:27,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:00:27,116 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:27,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:27,327 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,SelfDestructingSolverStorable9 [2021-12-28 01:00:27,328 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:00:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:00:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2021-12-28 01:00:27,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:00:27,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262072509] [2021-12-28 01:00:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:27,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:00:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:00:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 01:00:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 01:00:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 01:00:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:00:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 01:00:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-28 01:00:27,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:00:27,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262072509] [2021-12-28 01:00:27,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262072509] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:00:27,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114677204] [2021-12-28 01:00:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:00:27,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:00:27,475 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) [2021-12-28 01:00:27,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 01:00:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:00:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 01:00:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:00:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-28 01:00:27,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:00:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-28 01:00:28,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114677204] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:00:28,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:00:28,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 22 [2021-12-28 01:00:28,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774335351] [2021-12-28 01:00:28,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:00:28,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-28 01:00:28,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:00:28,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-28 01:00:28,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-12-28 01:00:28,316 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-28 01:00:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:00:28,494 INFO L93 Difference]: Finished difference Result 146 states and 204 transitions. [2021-12-28 01:00:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:00:28,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) Word has length 79 [2021-12-28 01:00:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:00:28,496 INFO L225 Difference]: With dead ends: 146 [2021-12-28 01:00:28,496 INFO L226 Difference]: Without dead ends: 0 [2021-12-28 01:00:28,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-12-28 01:00:28,497 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:00:28,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 218 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:00:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-28 01:00:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-28 01:00:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:00:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 01:00:28,498 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-12-28 01:00:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:00:28,498 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 01:00:28,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-28 01:00:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-28 01:00:28,499 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-28 01:00:28,501 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-28 01:00:28,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 01:00:28,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:00:28,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-28 01:00:29,031 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-28 01:00:29,031 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-28 01:00:29,031 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-28 01:00:29,032 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-28 01:00:29,032 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-12-28 01:00:29,032 INFO L854 garLoopResultBuilder]: At program point L43(lines 37 44) the Hoare annotation is: (<= 4 |ULTIMATE.start_main_~x~0#1|) [2021-12-28 01:00:29,032 INFO L858 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2021-12-28 01:00:29,032 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-12-28 01:00:29,032 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~x~0#1| 4) (<= 4 |ULTIMATE.start_main_~x~0#1|)) [2021-12-28 01:00:29,032 INFO L858 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-12-28 01:00:29,032 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2021-12-28 01:00:29,032 INFO L861 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-12-28 01:00:29,032 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2021-12-28 01:00:29,032 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L854 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and .cse0 (<= 4 fibo2_~n)) (and .cse0 (<= |fibo2_#t~ret6| 1) (< 1 fibo2_~n) (<= 1 |fibo2_#t~ret6|)))) [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L861 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-12-28 01:00:29,033 INFO L854 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L854 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret4|) (<= |fibo1_#in~n| 3) .cse0 (<= |fibo1_#t~ret4| 1)) (and (<= 4 fibo1_~n) (<= 2 |fibo1_#t~ret4|) .cse0 (<= |fibo1_#t~ret4| 2)) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2))) [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2021-12-28 01:00:29,033 INFO L858 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2021-12-28 01:00:29,036 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:00:29,037 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 01:00:29,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 01:00:29 BoogieIcfgContainer [2021-12-28 01:00:29,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 01:00:29,049 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 01:00:29,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 01:00:29,049 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 01:00:29,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:00:18" (3/4) ... [2021-12-28 01:00:29,052 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-28 01:00:29,057 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2021-12-28 01:00:29,057 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2021-12-28 01:00:29,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-28 01:00:29,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-28 01:00:29,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-28 01:00:29,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-28 01:00:29,089 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-28 01:00:29,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 01:00:29,090 INFO L158 Benchmark]: Toolchain (without parser) took 10960.43ms. Allocated memory was 54.5MB in the beginning and 100.7MB in the end (delta: 46.1MB). Free memory was 28.6MB in the beginning and 48.6MB in the end (delta: -20.0MB). Peak memory consumption was 24.3MB. Max. memory is 16.1GB. [2021-12-28 01:00:29,090 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 44.0MB. Free memory was 26.6MB in the beginning and 26.6MB in the end (delta: 47.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 01:00:29,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.03ms. Allocated memory is still 54.5MB. Free memory was 28.4MB in the beginning and 34.1MB in the end (delta: -5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-28 01:00:29,090 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.49ms. Allocated memory is still 54.5MB. Free memory was 34.1MB in the beginning and 38.8MB in the end (delta: -4.7MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2021-12-28 01:00:29,091 INFO L158 Benchmark]: Boogie Preprocessor took 10.97ms. Allocated memory is still 54.5MB. Free memory was 38.8MB in the beginning and 37.9MB in the end (delta: 914.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 01:00:29,091 INFO L158 Benchmark]: RCFGBuilder took 199.21ms. Allocated memory is still 54.5MB. Free memory was 37.9MB in the beginning and 28.9MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-28 01:00:29,092 INFO L158 Benchmark]: TraceAbstraction took 10478.73ms. Allocated memory was 54.5MB in the beginning and 100.7MB in the end (delta: 46.1MB). Free memory was 28.5MB in the beginning and 50.7MB in the end (delta: -22.2MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. [2021-12-28 01:00:29,092 INFO L158 Benchmark]: Witness Printer took 40.21ms. Allocated memory is still 100.7MB. Free memory was 50.7MB in the beginning and 48.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 01:00:29,094 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 44.0MB. Free memory was 26.6MB in the beginning and 26.6MB in the end (delta: 47.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.03ms. Allocated memory is still 54.5MB. Free memory was 28.4MB in the beginning and 34.1MB in the end (delta: -5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.49ms. Allocated memory is still 54.5MB. Free memory was 34.1MB in the beginning and 38.8MB in the end (delta: -4.7MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.97ms. Allocated memory is still 54.5MB. Free memory was 38.8MB in the beginning and 37.9MB in the end (delta: 914.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 199.21ms. Allocated memory is still 54.5MB. Free memory was 37.9MB in the beginning and 28.9MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 10478.73ms. Allocated memory was 54.5MB in the beginning and 100.7MB in the end (delta: 46.1MB). Free memory was 28.5MB in the beginning and 50.7MB in the end (delta: -22.2MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. * Witness Printer took 40.21ms. Allocated memory is still 100.7MB. Free memory was 50.7MB in the beginning and 48.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.4s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 533 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 466 mSDsluCounter, 2366 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2062 mSDsCounter, 386 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2459 IncrementalHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 386 mSolverCounterUnsat, 304 mSDtfsCounter, 2459 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1175 GetRequests, 953 SyntacticMatches, 27 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 82 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 401 PreInvPairs, 483 NumberOfFragments, 88 HoareAnnotationTreeSize, 401 FomulaSimplifications, 1404 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 983 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 913 NumberOfCodeBlocks, 913 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1330 ConstructedInterpolants, 0 QuantifiedInterpolants, 3324 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1195 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 1005/1452 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 4 <= x RESULT: Ultimate proved your program to be correct! [2021-12-28 01:00:29,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE