./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/bitvector-regression/recHanoi03-1.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 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:42:57,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:42:57,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:42:57,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:42:57,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:42:57,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:42:57,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:42:57,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:42:57,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:42:57,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:42:57,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:42:57,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:42:57,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:42:57,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:42:57,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:42:57,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:42:57,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:42:57,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:42:57,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:42:57,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:42:57,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:42:57,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:42:57,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:42:57,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:42:57,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:42:57,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:42:57,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:42:57,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:42:57,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:42:57,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:42:57,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:42:57,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:42:57,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:42:57,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:42:57,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:42:57,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:42:57,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:42:57,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:42:57,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:42:57,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:42:57,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:42:57,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:42:57,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:42:57,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:42:57,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:42:57,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:42:57,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:42:57,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:42:57,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:42:57,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:42:57,312 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:42:57,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:42:57,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:42:57,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:42:57,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:42:57,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:42:57,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:42:57,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:42:57,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:42:57,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:42:57,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:42:57,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:42:57,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:42:57,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:42:57,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:42:57,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:42:57,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:42:57,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:42:57,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:42:57,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:42:57,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:42:57,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:42:57,320 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:42:57,320 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:42:57,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:42:57,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:42:57,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-12-14 11:42:57,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:42:57,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:42:57,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:42:57,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:42:57,579 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:42:57,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-14 11:42:57,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e5d3796/ebfc42c51f3349cda1000ef7a93d7248/FLAGc9f220723 [2021-12-14 11:42:57,999 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:42:58,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-14 11:42:58,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e5d3796/ebfc42c51f3349cda1000ef7a93d7248/FLAGc9f220723 [2021-12-14 11:42:58,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e5d3796/ebfc42c51f3349cda1000ef7a93d7248 [2021-12-14 11:42:58,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:42:58,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:42:58,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:42:58,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:42:58,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:42:58,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3574fe5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58, skipping insertion in model container [2021-12-14 11:42:58,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:42:58,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:42:58,222 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/bitvector-regression/recHanoi03-1.c[838,851] [2021-12-14 11:42:58,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:42:58,232 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:42:58,244 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/bitvector-regression/recHanoi03-1.c[838,851] [2021-12-14 11:42:58,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:42:58,255 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:42:58,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58 WrapperNode [2021-12-14 11:42:58,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:42:58,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:42:58,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:42:58,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:42:58,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,282 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2021-12-14 11:42:58,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:42:58,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:42:58,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:42:58,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:42:58,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:42:58,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:42:58,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:42:58,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:42:58,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (1/1) ... [2021-12-14 11:42:58,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:42:58,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:42:58,340 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) [2021-12-14 11:42:58,353 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 [2021-12-14 11:42:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:42:58,378 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-12-14 11:42:58,378 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-12-14 11:42:58,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:42:58,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:42:58,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:42:58,418 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:42:58,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:42:58,489 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:42:58,494 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:42:58,494 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 11:42:58,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:42:58 BoogieIcfgContainer [2021-12-14 11:42:58,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:42:58,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:42:58,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:42:58,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:42:58,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:42:58" (1/3) ... [2021-12-14 11:42:58,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2b53f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:42:58, skipping insertion in model container [2021-12-14 11:42:58,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:58" (2/3) ... [2021-12-14 11:42:58,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2b53f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:42:58, skipping insertion in model container [2021-12-14 11:42:58,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:42:58" (3/3) ... [2021-12-14 11:42:58,504 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-12-14 11:42:58,508 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:42:58,508 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:42:58,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:42:58,550 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 [2021-12-14 11:42:58,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:42:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:42:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 11:42:58,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:42:58,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:42:58,566 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:42:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:42:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-12-14 11:42:58,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:42:58,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303984170] [2021-12-14 11:42:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:42:58,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:42:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 11:42:58,654 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 11:42:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 11:42:58,702 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 11:42:58,704 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 11:42:58,706 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 11:42:58,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:42:58,712 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-14 11:42:58,714 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 11:42:58,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 11:42:58 BoogieIcfgContainer [2021-12-14 11:42:58,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 11:42:58,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 11:42:58,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 11:42:58,735 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 11:42:58,735 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:42:58" (3/4) ... [2021-12-14 11:42:58,738 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 11:42:58,739 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 11:42:58,741 INFO L158 Benchmark]: Toolchain (without parser) took 709.87ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 60.3MB in the beginning and 68.9MB in the end (delta: -8.5MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2021-12-14 11:42:58,741 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 11:42:58,742 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.44ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 60.1MB in the beginning and 94.4MB in the end (delta: -34.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 11:42:58,743 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.85ms. Allocated memory is still 117.4MB. Free memory was 94.4MB in the beginning and 93.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 11:42:58,743 INFO L158 Benchmark]: Boogie Preprocessor took 22.55ms. Allocated memory is still 117.4MB. Free memory was 93.1MB in the beginning and 92.2MB in the end (delta: 872.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 11:42:58,745 INFO L158 Benchmark]: RCFGBuilder took 188.49ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 83.2MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 11:42:58,746 INFO L158 Benchmark]: TraceAbstraction took 233.18ms. Allocated memory is still 117.4MB. Free memory was 82.7MB in the beginning and 69.3MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 11:42:58,746 INFO L158 Benchmark]: Witness Printer took 8.16ms. Allocated memory is still 117.4MB. Free memory is still 68.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 11:42:58,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory is still 45.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 223.44ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 60.1MB in the beginning and 94.4MB in the end (delta: -34.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.85ms. Allocated memory is still 117.4MB. Free memory was 94.4MB in the beginning and 93.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.55ms. Allocated memory is still 117.4MB. Free memory was 93.1MB in the beginning and 92.2MB in the end (delta: 872.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 188.49ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 83.2MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 233.18ms. Allocated memory is still 117.4MB. Free memory was 82.7MB in the beginning and 69.3MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 8.16ms. Allocated memory is still 117.4MB. Free memory is still 68.9MB. There was no memory consumed. 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 - UnprovableResult [Line: 36]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=1] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-12-14 11:43:01,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:43:01,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:43:01,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:43:01,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:43:01,212 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:43:01,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-14 11:43:01,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d317f65f7/6baab865e718403da5ddef98a6ff0cb6/FLAG5f102e369 [2021-12-14 11:43:01,680 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:43:01,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-14 11:43:01,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d317f65f7/6baab865e718403da5ddef98a6ff0cb6/FLAG5f102e369 [2021-12-14 11:43:01,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d317f65f7/6baab865e718403da5ddef98a6ff0cb6 [2021-12-14 11:43:01,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:43:01,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:43:01,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:43:01,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:43:01,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:43:01,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180e1108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01, skipping insertion in model container [2021-12-14 11:43:01,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:43:01,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:43:01,885 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/bitvector-regression/recHanoi03-1.c[838,851] [2021-12-14 11:43:01,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:43:01,898 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:43:01,918 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/bitvector-regression/recHanoi03-1.c[838,851] [2021-12-14 11:43:01,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:43:01,935 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:43:01,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01 WrapperNode [2021-12-14 11:43:01,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:43:01,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:43:01,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:43:01,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:43:01,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,965 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2021-12-14 11:43:01,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:43:01,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:43:01,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:43:01,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:43:01,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:01,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:43:01,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:43:01,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:43:01,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:43:01,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (1/1) ... [2021-12-14 11:43:02,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:43:02,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:43:02,020 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) [2021-12-14 11:43:02,050 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 [2021-12-14 11:43:02,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:43:02,064 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-12-14 11:43:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-12-14 11:43:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:43:02,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:43:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 11:43:02,127 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:43:02,129 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:43:02,242 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:43:02,247 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:43:02,248 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 11:43:02,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:43:02 BoogieIcfgContainer [2021-12-14 11:43:02,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:43:02,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:43:02,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:43:02,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:43:02,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:43:01" (1/3) ... [2021-12-14 11:43:02,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f19547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:43:02, skipping insertion in model container [2021-12-14 11:43:02,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:43:01" (2/3) ... [2021-12-14 11:43:02,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f19547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:43:02, skipping insertion in model container [2021-12-14 11:43:02,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:43:02" (3/3) ... [2021-12-14 11:43:02,256 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-12-14 11:43:02,260 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:43:02,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:43:02,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:43:02,317 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 [2021-12-14 11:43:02,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:43:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:43:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 11:43:02,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:02,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:02,334 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-12-14 11:43:02,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147676913] [2021-12-14 11:43:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:43:02,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:02,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:02,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:02,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 11:43:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:43:02,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:43:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:43:02,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:43:02,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147676913] [2021-12-14 11:43:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147676913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:43:02,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:43:02,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 11:43:02,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081894254] [2021-12-14 11:43:02,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:43:02,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:43:02,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:43:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:43:02,708 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2021-12-14 11:43:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:02,807 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-14 11:43:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 11:43:02,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2021-12-14 11:43:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:02,819 INFO L225 Difference]: With dead ends: 32 [2021-12-14 11:43:02,819 INFO L226 Difference]: Without dead ends: 16 [2021-12-14 11:43:02,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:43:02,827 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:02,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:43:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-14 11:43:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-14 11:43:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 11:43:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-14 11:43:02,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-12-14 11:43:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:02,853 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-14 11:43:02,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2021-12-14 11:43:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-14 11:43:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 11:43:02,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:02,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:02,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 11:43:03,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:03,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2021-12-14 11:43:03,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196418610] [2021-12-14 11:43:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:43:03,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:03,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:03,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:03,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 11:43:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:43:03,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:43:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 11:43:03,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:43:03,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:03,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196418610] [2021-12-14 11:43:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196418610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:03,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:03,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-14 11:43:03,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510119458] [2021-12-14 11:43:03,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:03,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 11:43:03,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 11:43:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-14 11:43:03,859 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 11:43:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:04,179 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-14 11:43:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:43:04,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2021-12-14 11:43:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:04,181 INFO L225 Difference]: With dead ends: 28 [2021-12-14 11:43:04,181 INFO L226 Difference]: Without dead ends: 22 [2021-12-14 11:43:04,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-12-14 11:43:04,183 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:04,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2021-12-14 11:43:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-14 11:43:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-14 11:43:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 11:43:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-12-14 11:43:04,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-12-14 11:43:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:04,190 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-14 11:43:04,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 11:43:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-12-14 11:43:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 11:43:04,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:04,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:04,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-14 11:43:04,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:04,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2021-12-14 11:43:04,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090159054] [2021-12-14 11:43:04,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:43:04,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:04,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:04,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 11:43:04,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:43:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:43:04,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 11:43:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 11:43:04,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:43:06,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:06,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090159054] [2021-12-14 11:43:06,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090159054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:06,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:06,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-12-14 11:43:06,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637800068] [2021-12-14 11:43:06,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:06,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 11:43:06,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 11:43:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-12-14 11:43:06,263 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-14 11:43:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:06,884 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-12-14 11:43:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 11:43:06,885 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2021-12-14 11:43:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:06,887 INFO L225 Difference]: With dead ends: 34 [2021-12-14 11:43:06,887 INFO L226 Difference]: Without dead ends: 28 [2021-12-14 11:43:06,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 11:43:06,889 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:06,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 127 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 168 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-12-14 11:43:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-14 11:43:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-14 11:43:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 11:43:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-14 11:43:06,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-12-14 11:43:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:06,895 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-14 11:43:06,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-14 11:43:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-14 11:43:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 11:43:06,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:06,897 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:06,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-14 11:43:07,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:07,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:07,106 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2021-12-14 11:43:07,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:07,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668438701] [2021-12-14 11:43:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:43:07,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:07,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:07,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 11:43:07,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-14 11:43:07,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:43:07,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 11:43:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 11:43:07,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 11:43:10,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:10,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668438701] [2021-12-14 11:43:10,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668438701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:10,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:10,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-12-14 11:43:10,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584661522] [2021-12-14 11:43:10,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:10,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 11:43:10,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 11:43:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 11:43:10,136 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-14 11:43:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:10,745 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-14 11:43:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 11:43:10,746 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2021-12-14 11:43:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:10,748 INFO L225 Difference]: With dead ends: 40 [2021-12-14 11:43:10,748 INFO L226 Difference]: Without dead ends: 34 [2021-12-14 11:43:10,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 11:43:10,750 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:10,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 189 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 190 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2021-12-14 11:43:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-14 11:43:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-14 11:43:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-14 11:43:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-14 11:43:10,756 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2021-12-14 11:43:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:10,757 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-14 11:43:10,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-14 11:43:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-14 11:43:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 11:43:10,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:10,758 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:10,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:43:10,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:10,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2021-12-14 11:43:10,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220750229] [2021-12-14 11:43:10,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:43:10,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:10,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:10,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 11:43:11,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:43:11,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:43:11,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 11:43:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-14 11:43:11,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 11:43:15,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:15,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220750229] [2021-12-14 11:43:15,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220750229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:15,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:15,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-12-14 11:43:15,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851213504] [2021-12-14 11:43:15,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:15,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-14 11:43:15,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-14 11:43:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 11:43:15,302 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-14 11:43:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:16,163 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-12-14 11:43:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 11:43:16,163 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2021-12-14 11:43:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:16,164 INFO L225 Difference]: With dead ends: 46 [2021-12-14 11:43:16,164 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 11:43:16,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2021-12-14 11:43:16,170 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:16,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 302 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 335 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2021-12-14 11:43:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 11:43:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-14 11:43:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-14 11:43:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-14 11:43:16,191 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2021-12-14 11:43:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:16,193 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-14 11:43:16,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-14 11:43:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-14 11:43:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 11:43:16,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:16,199 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:16,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:43:16,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:16,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:16,409 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2021-12-14 11:43:16,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:16,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488370805] [2021-12-14 11:43:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:43:16,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:16,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:16,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 11:43:16,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-14 11:43:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:43:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-14 11:43:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-14 11:43:16,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 11:43:22,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:22,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488370805] [2021-12-14 11:43:22,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488370805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:22,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:22,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-12-14 11:43:22,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404046992] [2021-12-14 11:43:22,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:22,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-14 11:43:22,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-14 11:43:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2021-12-14 11:43:22,100 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-14 11:43:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:23,259 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-12-14 11:43:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 11:43:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2021-12-14 11:43:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:23,261 INFO L225 Difference]: With dead ends: 52 [2021-12-14 11:43:23,261 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 11:43:23,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2021-12-14 11:43:23,263 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:23,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 367 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 367 Invalid, 0 Unknown, 456 Unchecked, 0.3s Time] [2021-12-14 11:43:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 11:43:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-14 11:43:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-14 11:43:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-12-14 11:43:23,271 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2021-12-14 11:43:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:23,272 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-12-14 11:43:23,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-14 11:43:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-12-14 11:43:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 11:43:23,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:23,276 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:23,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 11:43:23,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:23,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2021-12-14 11:43:23,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468640998] [2021-12-14 11:43:23,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 11:43:23,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:23,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:23,490 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:23,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 11:43:23,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-14 11:43:23,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:43:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 11:43:23,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-14 11:43:24,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 11:43:31,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468640998] [2021-12-14 11:43:31,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468640998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:31,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:31,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2021-12-14 11:43:31,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655381971] [2021-12-14 11:43:31,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:31,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-14 11:43:31,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-14 11:43:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2021-12-14 11:43:31,317 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-12-14 11:43:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:32,934 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-12-14 11:43:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 11:43:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2021-12-14 11:43:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:32,936 INFO L225 Difference]: With dead ends: 58 [2021-12-14 11:43:32,936 INFO L226 Difference]: Without dead ends: 52 [2021-12-14 11:43:32,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2021-12-14 11:43:32,938 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:32,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 652 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 624 Invalid, 0 Unknown, 650 Unchecked, 0.4s Time] [2021-12-14 11:43:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-14 11:43:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-14 11:43:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 11:43:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-14 11:43:32,944 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2021-12-14 11:43:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:32,944 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-14 11:43:32,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-12-14 11:43:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-14 11:43:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-14 11:43:32,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:32,946 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:32,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-14 11:43:33,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:33,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2021-12-14 11:43:33,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:33,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003266872] [2021-12-14 11:43:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 11:43:33,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:33,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:33,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 11:43:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:43:33,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-14 11:43:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-14 11:43:33,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-14 11:43:42,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:42,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003266872] [2021-12-14 11:43:42,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003266872] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:42,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:42,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2021-12-14 11:43:42,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831309545] [2021-12-14 11:43:42,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:42,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-14 11:43:42,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:42,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-14 11:43:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2021-12-14 11:43:42,880 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-12-14 11:43:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:44,894 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-12-14 11:43:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 11:43:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2021-12-14 11:43:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:44,896 INFO L225 Difference]: With dead ends: 64 [2021-12-14 11:43:44,896 INFO L226 Difference]: Without dead ends: 58 [2021-12-14 11:43:44,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-12-14 11:43:44,899 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 792 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:44,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 777 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 707 Invalid, 0 Unknown, 792 Unchecked, 0.4s Time] [2021-12-14 11:43:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-14 11:43:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-14 11:43:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-14 11:43:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-12-14 11:43:44,905 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2021-12-14 11:43:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:44,905 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-12-14 11:43:44,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-12-14 11:43:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-12-14 11:43:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 11:43:44,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:44,907 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:44,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-14 11:43:45,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:45,116 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2021-12-14 11:43:45,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434066617] [2021-12-14 11:43:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:43:45,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:45,118 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:45,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 11:43:45,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:43:45,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:43:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-14 11:43:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:43:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-14 11:43:46,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:43:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-14 11:43:57,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 11:43:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434066617] [2021-12-14 11:43:57,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434066617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:43:57,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:43:57,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2021-12-14 11:43:57,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726647145] [2021-12-14 11:43:57,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:43:57,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-14 11:43:57,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 11:43:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-14 11:43:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2021-12-14 11:43:57,256 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-12-14 11:43:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:43:59,565 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-12-14 11:43:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 11:43:59,566 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2021-12-14 11:43:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:43:59,568 INFO L225 Difference]: With dead ends: 70 [2021-12-14 11:43:59,568 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 11:43:59,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2021-12-14 11:43:59,572 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 11:43:59,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 889 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 796 Invalid, 0 Unknown, 1169 Unchecked, 0.5s Time] [2021-12-14 11:43:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 11:43:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-14 11:43:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-14 11:43:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-12-14 11:43:59,578 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2021-12-14 11:43:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:43:59,578 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-12-14 11:43:59,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-12-14 11:43:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-12-14 11:43:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 11:43:59,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:43:59,580 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:43:59,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-14 11:43:59,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 11:43:59,787 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:43:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:43:59,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2021-12-14 11:43:59,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 11:43:59,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142027646] [2021-12-14 11:43:59,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:43:59,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 11:43:59,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 11:43:59,789 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 11:43:59,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-14 11:43:59,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-14 11:43:59,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:43:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-14 11:43:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:44:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-14 11:44:00,912 INFO L328 TraceCheckSpWp]: Computing backward predicates...