./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 c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-tmp.no-commuhash-c3fed41 [2021-12-15 21:57:47,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:57:47,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:57:47,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:57:47,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:57:47,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:57:47,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:57:47,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:57:47,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:57:47,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:57:47,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:57:47,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:57:47,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:57:47,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:57:47,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:57:47,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:57:47,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:57:47,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:57:47,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:57:47,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:57:47,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:57:47,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:57:47,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:57:47,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:57:47,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:57:47,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:57:47,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:57:47,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:57:47,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:57:47,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:57:47,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:57:47,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:57:47,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:57:47,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:57:47,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:57:47,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:57:47,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:57:47,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:57:47,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:57:47,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:57:47,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:57:47,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:57:47,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:57:47,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:57:47,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:57:47,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:57:47,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:57:47,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:57:47,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:57:47,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:57:47,574 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:57:47,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:57:47,575 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:57:47,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:57:47,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:57:47,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:57:47,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:57:47,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:57:47,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:57:47,576 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:57:47,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:57:47,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:57:47,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:57:47,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:57:47,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:57:47,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:57:47,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:57:47,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:57:47,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:57:47,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:57:47,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:57:47,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:57:47,579 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:57:47,579 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:57:47,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:57:47,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:57:47,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-12-15 21:57:47,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:57:47,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:57:47,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:57:47,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:57:47,803 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:57:47,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-15 21:57:47,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af2262d/3e21e9c07aa442cca241fe49db1712c4/FLAG34d26d242 [2021-12-15 21:57:48,200 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:57:48,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-15 21:57:48,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af2262d/3e21e9c07aa442cca241fe49db1712c4/FLAG34d26d242 [2021-12-15 21:57:48,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af2262d/3e21e9c07aa442cca241fe49db1712c4 [2021-12-15 21:57:48,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:57:48,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:57:48,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:57:48,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:57:48,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:57:48,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104bbe63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48, skipping insertion in model container [2021-12-15 21:57:48,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:57:48,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:57:48,351 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] [2021-12-15 21:57:48,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:57:48,364 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:57:48,376 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] [2021-12-15 21:57:48,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:57:48,386 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:57:48,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48 WrapperNode [2021-12-15 21:57:48,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:57:48,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:57:48,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:57:48,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:57:48,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,415 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2021-12-15 21:57:48,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:57:48,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:57:48,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:57:48,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:57:48,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:57:48,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:57:48,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:57:48,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:57:48,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (1/1) ... [2021-12-15 21:57:48,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:57:48,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:57:48,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:57:48,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:57:48,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:57:48,499 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-12-15 21:57:48,500 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-12-15 21:57:48,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:57:48,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:57:48,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:57:48,536 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:57:48,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:57:48,601 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:57:48,605 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:57:48,605 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 21:57:48,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:48 BoogieIcfgContainer [2021-12-15 21:57:48,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:57:48,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:57:48,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:57:48,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:57:48,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:57:48" (1/3) ... [2021-12-15 21:57:48,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d844934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:48, skipping insertion in model container [2021-12-15 21:57:48,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:48" (2/3) ... [2021-12-15 21:57:48,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d844934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:48, skipping insertion in model container [2021-12-15 21:57:48,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:48" (3/3) ... [2021-12-15 21:57:48,612 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-12-15 21:57:48,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:57:48,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:57:48,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:57:48,650 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:57:48,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:57:48,660 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) [2021-12-15 21:57:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 21:57:48,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:48,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:57:48,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-12-15 21:57:48,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:57:48,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716335400] [2021-12-15 21:57:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:48,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:57:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 21:57:48,749 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 21:57:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 21:57:48,793 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 21:57:48,794 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 21:57:48,796 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 21:57:48,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:57:48,801 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-15 21:57:48,804 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 21:57:48,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:57:48 BoogieIcfgContainer [2021-12-15 21:57:48,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 21:57:48,825 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 21:57:48,825 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 21:57:48,825 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 21:57:48,825 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:48" (3/4) ... [2021-12-15 21:57:48,828 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 21:57:48,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 21:57:48,829 INFO L158 Benchmark]: Toolchain (without parser) took 614.18ms. Allocated memory is still 98.6MB. Free memory was 69.1MB in the beginning and 48.5MB in the end (delta: 20.5MB). Peak memory consumption was 18.1MB. Max. memory is 16.1GB. [2021-12-15 21:57:48,830 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 98.6MB. Free memory was 55.4MB in the beginning and 55.4MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 21:57:48,831 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.25ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 74.0MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 21:57:48,831 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.66ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 72.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 21:57:48,832 INFO L158 Benchmark]: Boogie Preprocessor took 17.01ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 71.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 21:57:48,836 INFO L158 Benchmark]: RCFGBuilder took 173.04ms. Allocated memory is still 98.6MB. Free memory was 71.6MB in the beginning and 62.8MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 21:57:48,836 INFO L158 Benchmark]: TraceAbstraction took 214.45ms. Allocated memory is still 98.6MB. Free memory was 62.2MB in the beginning and 48.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 21:57:48,837 INFO L158 Benchmark]: Witness Printer took 3.84ms. Allocated memory is still 98.6MB. Free memory was 48.9MB in the beginning and 48.5MB in the end (delta: 335.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 21:57:48,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 98.6MB. Free memory was 55.4MB in the beginning and 55.4MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.25ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 74.0MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.66ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 72.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.01ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 71.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 173.04ms. Allocated memory is still 98.6MB. Free memory was 71.6MB in the beginning and 62.8MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 214.45ms. Allocated memory is still 98.6MB. Free memory was 62.2MB in the beginning and 48.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.84ms. Allocated memory is still 98.6MB. Free memory was 48.9MB in the beginning and 48.5MB in the end (delta: 335.1kB). 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 [2021-12-15 21:57:50,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:57:51,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:57:51,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:57:51,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:57:51,010 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:57:51,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-15 21:57:51,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc405243f/ab39518184ee4e269f69c95e83c824cb/FLAG7b9ee8797 [2021-12-15 21:57:51,440 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:57:51,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-15 21:57:51,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc405243f/ab39518184ee4e269f69c95e83c824cb/FLAG7b9ee8797 [2021-12-15 21:57:51,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc405243f/ab39518184ee4e269f69c95e83c824cb [2021-12-15 21:57:51,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:57:51,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:57:51,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:57:51,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:57:51,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:57:51,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5951269a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51, skipping insertion in model container [2021-12-15 21:57:51,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:57:51,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:57:51,599 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] [2021-12-15 21:57:51,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:57:51,611 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:57:51,637 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] [2021-12-15 21:57:51,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:57:51,665 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:57:51,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51 WrapperNode [2021-12-15 21:57:51,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:57:51,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:57:51,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:57:51,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:57:51,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,686 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2021-12-15 21:57:51,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:57:51,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:57:51,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:57:51,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:57:51,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:57:51,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:57:51,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:57:51,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:57:51,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (1/1) ... [2021-12-15 21:57:51,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:57:51,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:57:51,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:57:51,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:57:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:57:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-12-15 21:57:51,776 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-12-15 21:57:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:57:51,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:57:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 21:57:51,829 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:57:51,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:57:51,933 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:57:51,937 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:57:51,938 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 21:57:51,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:51 BoogieIcfgContainer [2021-12-15 21:57:51,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:57:51,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:57:51,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:57:51,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:57:51,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:57:51" (1/3) ... [2021-12-15 21:57:51,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61afc788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:51, skipping insertion in model container [2021-12-15 21:57:51,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:51" (2/3) ... [2021-12-15 21:57:51,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61afc788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:51, skipping insertion in model container [2021-12-15 21:57:51,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:51" (3/3) ... [2021-12-15 21:57:51,945 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-12-15 21:57:51,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:57:51,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:57:51,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:57:51,991 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:57:51,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:57:52,009 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) [2021-12-15 21:57:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 21:57:52,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:52,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:57:52,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-12-15 21:57:52,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:57:52,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776513657] [2021-12-15 21:57:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:52,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:57:52,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:57:52,062 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) [2021-12-15 21:57:52,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 21:57:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:57:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:57:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:57:52,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:57:52,330 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:57:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776513657] [2021-12-15 21:57:52,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776513657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:57:52,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:57:52,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 21:57:52,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004074425] [2021-12-15 21:57:52,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:57:52,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:57:52,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:57:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:57:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:57:52,365 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) [2021-12-15 21:57:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:52,461 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-15 21:57:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 21:57:52,464 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 [2021-12-15 21:57:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:52,479 INFO L225 Difference]: With dead ends: 32 [2021-12-15 21:57:52,479 INFO L226 Difference]: Without dead ends: 16 [2021-12-15 21:57:52,482 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 [2021-12-15 21:57:52,485 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-12-15 21:57:52,486 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] [2021-12-15 21:57:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-15 21:57:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-15 21:57:52,516 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) [2021-12-15 21:57:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-15 21:57:52,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-12-15 21:57:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:52,520 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-15 21:57:52,520 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) [2021-12-15 21:57:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-15 21:57:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:57:52,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:52,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:57:52,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 21:57:52,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:57:52,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2021-12-15 21:57:52,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:57:52,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132944759] [2021-12-15 21:57:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:52,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:57:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:57:52,748 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) [2021-12-15 21:57:52,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 21:57:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:52,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 21:57:52,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:57:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:57:52,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:57:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:57:53,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:57:53,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132944759] [2021-12-15 21:57:53,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132944759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:57:53,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:57:53,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-15 21:57:53,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073690334] [2021-12-15 21:57:53,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:57:53,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 21:57:53,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:57:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 21:57:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-15 21:57:53,388 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) [2021-12-15 21:57:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:53,635 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-15 21:57:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:57:53,635 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 [2021-12-15 21:57:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:53,637 INFO L225 Difference]: With dead ends: 28 [2021-12-15 21:57:53,637 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 21:57:53,638 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 [2021-12-15 21:57:53,638 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 [2021-12-15 21:57:53,639 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] [2021-12-15 21:57:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 21:57:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-15 21:57:53,642 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) [2021-12-15 21:57:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-12-15 21:57:53,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-12-15 21:57:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-15 21:57:53,643 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) [2021-12-15 21:57:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-12-15 21:57:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 21:57:53,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:53,644 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:57:53,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:57:53,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:57:53,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2021-12-15 21:57:53,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:57:53,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403923182] [2021-12-15 21:57:53,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:57:53,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:57:53,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:57:53,858 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) [2021-12-15 21:57:53,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 21:57:53,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:57:53,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:57:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 21:57:53,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:57:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:57:54,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:57:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 21:57:55,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:57:55,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403923182] [2021-12-15 21:57:55,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403923182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:57:55,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:57:55,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-12-15 21:57:55,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254055670] [2021-12-15 21:57:55,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:57:55,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 21:57:55,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:57:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 21:57:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-12-15 21:57:55,717 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) [2021-12-15 21:57:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:56,339 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-12-15 21:57:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 21:57:56,340 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 [2021-12-15 21:57:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:56,341 INFO L225 Difference]: With dead ends: 34 [2021-12-15 21:57:56,341 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 21:57:56,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 21:57:56,343 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 [2021-12-15 21:57:56,343 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] [2021-12-15 21:57:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 21:57:56,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-15 21:57:56,348 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) [2021-12-15 21:57:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-15 21:57:56,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-12-15 21:57:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:56,349 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-15 21:57:56,349 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) [2021-12-15 21:57:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-15 21:57:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 21:57:56,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:56,350 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:57:56,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:57:56,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:57:56,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:56,557 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2021-12-15 21:57:56,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:57:56,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794097477] [2021-12-15 21:57:56,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:57:56,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:57:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:57:56,564 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) [2021-12-15 21:57:56,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 21:57:56,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 21:57:56,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:57:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 21:57:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:57:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 21:57:57,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:57:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 21:57:59,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:57:59,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794097477] [2021-12-15 21:57:59,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794097477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:57:59,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:57:59,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-12-15 21:57:59,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63501709] [2021-12-15 21:57:59,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:57:59,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-15 21:57:59,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:57:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-15 21:57:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 21:57:59,470 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) [2021-12-15 21:57:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:59,992 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-15 21:57:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 21:57:59,993 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 [2021-12-15 21:57:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:59,994 INFO L225 Difference]: With dead ends: 40 [2021-12-15 21:57:59,994 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 21:57:59,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 21:57:59,996 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:57:59,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 189 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 190 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2021-12-15 21:57:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 21:57:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-15 21:58:00,000 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) [2021-12-15 21:58:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-15 21:58:00,000 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2021-12-15 21:58:00,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:00,001 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-15 21:58:00,001 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) [2021-12-15 21:58:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-15 21:58:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 21:58:00,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:00,002 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:00,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:00,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:58:00,209 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:00,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2021-12-15 21:58:00,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:58:00,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730803969] [2021-12-15 21:58:00,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:58:00,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:58:00,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:58:00,212 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) [2021-12-15 21:58:00,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 21:58:00,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:58:00,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:58:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 21:58:00,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:58:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-15 21:58:00,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:58:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 21:58:04,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:58:04,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730803969] [2021-12-15 21:58:04,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730803969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:58:04,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:58:04,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-12-15 21:58:04,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652616089] [2021-12-15 21:58:04,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:58:04,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-15 21:58:04,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:58:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-15 21:58:04,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 21:58:04,294 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) [2021-12-15 21:58:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:05,058 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-12-15 21:58:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 21:58:05,060 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 [2021-12-15 21:58:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:05,062 INFO L225 Difference]: With dead ends: 46 [2021-12-15 21:58:05,062 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 21:58:05,064 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 [2021-12-15 21:58:05,065 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 [2021-12-15 21:58:05,066 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] [2021-12-15 21:58:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 21:58:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-15 21:58:05,077 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) [2021-12-15 21:58:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-15 21:58:05,080 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2021-12-15 21:58:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:05,081 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-15 21:58:05,081 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) [2021-12-15 21:58:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-15 21:58:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 21:58:05,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:05,086 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:05,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:05,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:58:05,294 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2021-12-15 21:58:05,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:58:05,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155406224] [2021-12-15 21:58:05,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:58:05,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:58:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:58:05,298 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) [2021-12-15 21:58:05,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 21:58:05,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-15 21:58:05,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:58:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-15 21:58:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:58:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-15 21:58:05,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:58:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 21:58:10,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:58:10,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155406224] [2021-12-15 21:58:10,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155406224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:58:10,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:58:10,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-12-15 21:58:10,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532338607] [2021-12-15 21:58:10,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:58:10,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-15 21:58:10,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:58:10,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-15 21:58:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 21:58:10,336 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) [2021-12-15 21:58:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:11,395 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-12-15 21:58:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 21:58:11,396 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 [2021-12-15 21:58:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:11,397 INFO L225 Difference]: With dead ends: 52 [2021-12-15 21:58:11,397 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 21:58:11,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2021-12-15 21:58:11,399 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:11,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 367 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 367 Invalid, 0 Unknown, 456 Unchecked, 0.2s Time] [2021-12-15 21:58:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 21:58:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-15 21:58:11,402 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) [2021-12-15 21:58:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-12-15 21:58:11,403 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2021-12-15 21:58:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:11,403 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-12-15 21:58:11,403 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) [2021-12-15 21:58:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-12-15 21:58:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 21:58:11,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:11,404 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:11,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:11,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:58:11,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:11,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2021-12-15 21:58:11,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:58:11,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427587174] [2021-12-15 21:58:11,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:58:11,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:58:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:58:11,623 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) [2021-12-15 21:58:11,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-15 21:58:11,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-15 21:58:11,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:58:11,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 21:58:11,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:58:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-15 21:58:12,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:58:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 21:58:18,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:58:18,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427587174] [2021-12-15 21:58:18,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427587174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:58:18,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:58:18,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2021-12-15 21:58:18,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630542717] [2021-12-15 21:58:18,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:58:18,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-15 21:58:18,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:58:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-15 21:58:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2021-12-15 21:58:18,812 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) [2021-12-15 21:58:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:20,236 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-12-15 21:58:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 21:58:20,237 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 [2021-12-15 21:58:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:20,237 INFO L225 Difference]: With dead ends: 58 [2021-12-15 21:58:20,238 INFO L226 Difference]: Without dead ends: 52 [2021-12-15 21:58:20,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2021-12-15 21:58:20,240 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:20,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 652 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 624 Invalid, 0 Unknown, 650 Unchecked, 0.3s Time] [2021-12-15 21:58:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-15 21:58:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-15 21:58:20,246 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) [2021-12-15 21:58:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-15 21:58:20,246 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2021-12-15 21:58:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:20,247 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-15 21:58:20,247 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) [2021-12-15 21:58:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-15 21:58:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 21:58:20,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:20,248 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:20,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:20,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:58:20,448 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2021-12-15 21:58:20,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:58:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540126244] [2021-12-15 21:58:20,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:58:20,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:58:20,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:58:20,451 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) [2021-12-15 21:58:20,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-15 21:58:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:20,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-15 21:58:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:58:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-15 21:58:21,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:58:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-15 21:58:29,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:58:29,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540126244] [2021-12-15 21:58:29,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540126244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:58:29,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:58:29,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2021-12-15 21:58:29,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397875845] [2021-12-15 21:58:29,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:58:29,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-15 21:58:29,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:58:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-15 21:58:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2021-12-15 21:58:29,915 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) [2021-12-15 21:58:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:31,672 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-12-15 21:58:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-15 21:58:31,673 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 [2021-12-15 21:58:31,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:31,674 INFO L225 Difference]: With dead ends: 64 [2021-12-15 21:58:31,674 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 21:58:31,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-12-15 21:58:31,677 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 [2021-12-15 21:58:31,677 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] [2021-12-15 21:58:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 21:58:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-15 21:58:31,680 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) [2021-12-15 21:58:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-12-15 21:58:31,681 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2021-12-15 21:58:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:31,681 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-12-15 21:58:31,681 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) [2021-12-15 21:58:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-12-15 21:58:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-15 21:58:31,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:31,682 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:31,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:31,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:58:31,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2021-12-15 21:58:31,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:58:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531185432] [2021-12-15 21:58:31,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:58:31,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:58:31,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:58:31,895 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) [2021-12-15 21:58:31,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-15 21:58:32,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:58:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:58:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-15 21:58:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:58:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-15 21:58:32,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:58:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-15 21:58:41,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:58:41,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531185432] [2021-12-15 21:58:41,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531185432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:58:41,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:58:41,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2021-12-15 21:58:41,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693408443] [2021-12-15 21:58:41,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:58:41,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-15 21:58:41,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:58:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-15 21:58:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2021-12-15 21:58:41,878 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) [2021-12-15 21:58:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:43,724 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-12-15 21:58:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 21:58:43,725 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 [2021-12-15 21:58:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:43,727 INFO L225 Difference]: With dead ends: 70 [2021-12-15 21:58:43,727 INFO L226 Difference]: Without dead ends: 64 [2021-12-15 21:58:43,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2021-12-15 21:58:43,733 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:43,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 889 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 796 Invalid, 0 Unknown, 1169 Unchecked, 0.3s Time] [2021-12-15 21:58:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-15 21:58:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-15 21:58:43,762 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) [2021-12-15 21:58:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-12-15 21:58:43,765 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2021-12-15 21:58:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:43,766 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-12-15 21:58:43,766 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) [2021-12-15 21:58:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-12-15 21:58:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-15 21:58:43,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:43,767 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:43,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:43,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:58:43,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:43,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2021-12-15 21:58:43,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:58:43,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623092730] [2021-12-15 21:58:43,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:58:43,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:58:43,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:58:43,983 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) [2021-12-15 21:58:43,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-15 21:58:44,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-15 21:58:44,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:58:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-15 21:58:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:58:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-15 21:58:44,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:58:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-15 21:58:57,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 21:58:57,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623092730] [2021-12-15 21:58:57,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623092730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:58:57,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:58:57,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2021-12-15 21:58:57,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763123514] [2021-12-15 21:58:57,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:58:57,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-15 21:58:57,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 21:58:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-15 21:58:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2021-12-15 21:58:57,007 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-12-15 21:58:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:59,095 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-12-15 21:58:59,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 21:58:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2021-12-15 21:58:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:59,096 INFO L225 Difference]: With dead ends: 71 [2021-12-15 21:58:59,096 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 21:58:59,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1185, Invalid=15845, Unknown=0, NotChecked=0, Total=17030 [2021-12-15 21:58:59,098 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 377 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1314 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:59,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 1186 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 1009 Invalid, 0 Unknown, 1314 Unchecked, 0.5s Time] [2021-12-15 21:58:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 21:58:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-15 21:58:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-15 21:58:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-12-15 21:58:59,101 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 113 [2021-12-15 21:58:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:59,102 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-12-15 21:58:59,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-12-15 21:58:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-12-15 21:58:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 21:58:59,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:59,103 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:59,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:59,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 21:58:59,315 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash 79612228, now seen corresponding path program 10 times [2021-12-15 21:58:59,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 21:58:59,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092651976] [2021-12-15 21:58:59,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:58:59,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 21:58:59,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 21:58:59,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 21:58:59,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-15 21:58:59,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:58:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:58:59,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-15 21:58:59,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:59:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-12-15 21:59:00,599 INFO L328 TraceCheckSpWp]: Computing backward predicates...