/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:41:20,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:41:20,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:41:20,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:41:20,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:41:20,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:41:20,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:41:20,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:41:20,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:41:20,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:41:20,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:41:20,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:41:20,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:41:20,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:41:20,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:41:20,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:41:20,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:41:20,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:41:20,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:41:20,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:41:20,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:41:20,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:41:20,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:41:20,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:41:20,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:41:20,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:41:20,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:41:20,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:41:20,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:41:20,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:41:20,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:41:20,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:41:20,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:41:20,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:41:20,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:41:20,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:41:20,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:41:20,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:41:20,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:41:20,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:41:20,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:41:20,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:41:20,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:41:20,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:41:20,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:41:20,398 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:41:20,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:41:20,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:41:20,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:41:20,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:41:20,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:41:20,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:41:20,400 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:41:20,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:41:20,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:41:20,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:41:20,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:41:20,402 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:41:20,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:41:20,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:41:20,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:41:20,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:41:20,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:41:20,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:41:20,403 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:41:20,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:41:20,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:41:20,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:41:20,822 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:41:20,823 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:41:20,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-11-07 00:41:20,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec0a864c/2a587aa93b5f4352b756c0b33c55f41d/FLAG969043b40 [2020-11-07 00:41:21,464 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:41:21,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-11-07 00:41:21,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec0a864c/2a587aa93b5f4352b756c0b33c55f41d/FLAG969043b40 [2020-11-07 00:41:21,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec0a864c/2a587aa93b5f4352b756c0b33c55f41d [2020-11-07 00:41:21,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:41:21,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:41:21,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:21,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:41:21,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:41:21,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:21" (1/1) ... [2020-11-07 00:41:21,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3630506e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:21, skipping insertion in model container [2020-11-07 00:41:21,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:21" (1/1) ... [2020-11-07 00:41:21,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:41:21,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:41:22,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:22,147 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:41:22,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:41:22,184 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:41:22,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22 WrapperNode [2020-11-07 00:41:22,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:41:22,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:41:22,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:41:22,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:41:22,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... [2020-11-07 00:41:22,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... [2020-11-07 00:41:22,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... [2020-11-07 00:41:22,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... [2020-11-07 00:41:22,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... [2020-11-07 00:41:22,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... [2020-11-07 00:41:22,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... [2020-11-07 00:41:22,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:41:22,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:41:22,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:41:22,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:41:22,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:41:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:41:22,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:41:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:41:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-07 00:41:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-07 00:41:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:41:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 00:41:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:41:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:41:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:41:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:41:22,350 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-07 00:41:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-07 00:41:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:41:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:41:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:41:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:41:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:41:22,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:41:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:41:22,625 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:41:22,626 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:41:22,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:22 BoogieIcfgContainer [2020-11-07 00:41:22,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:41:22,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:41:22,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:41:22,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:41:22,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:41:21" (1/3) ... [2020-11-07 00:41:22,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c6012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:22, skipping insertion in model container [2020-11-07 00:41:22,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:22" (2/3) ... [2020-11-07 00:41:22,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c6012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:22, skipping insertion in model container [2020-11-07 00:41:22,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:22" (3/3) ... [2020-11-07 00:41:22,641 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-11-07 00:41:22,661 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:41:22,666 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:41:22,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:41:22,753 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:41:22,754 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:41:22,754 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:41:22,755 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:41:22,755 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:41:22,755 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:41:22,755 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:41:22,755 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:41:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-11-07 00:41:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 00:41:22,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:22,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:22,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash 138014369, now seen corresponding path program 1 times [2020-11-07 00:41:22,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:22,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614031744] [2020-11-07 00:41:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:22,951 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:23,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:23,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:41:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614031744] [2020-11-07 00:41:23,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:23,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:23,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027729416] [2020-11-07 00:41:23,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:23,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:23,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:23,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:23,338 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 6 states. [2020-11-07 00:41:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:23,835 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-11-07 00:41:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:23,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-11-07 00:41:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:23,847 INFO L225 Difference]: With dead ends: 64 [2020-11-07 00:41:23,848 INFO L226 Difference]: Without dead ends: 45 [2020-11-07 00:41:23,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-07 00:41:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-07 00:41:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-07 00:41:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-07 00:41:23,913 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 25 [2020-11-07 00:41:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:23,914 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-07 00:41:23,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-07 00:41:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 00:41:23,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:23,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:23,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:41:23,918 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1111577060, now seen corresponding path program 1 times [2020-11-07 00:41:23,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:23,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950798049] [2020-11-07 00:41:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:23,923 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:41:24,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950798049] [2020-11-07 00:41:24,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:24,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:24,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758418293] [2020-11-07 00:41:24,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:24,143 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 6 states. [2020-11-07 00:41:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:24,472 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-11-07 00:41:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:24,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-11-07 00:41:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:24,475 INFO L225 Difference]: With dead ends: 73 [2020-11-07 00:41:24,475 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 00:41:24,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 00:41:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-11-07 00:41:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-07 00:41:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-07 00:41:24,494 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 34 [2020-11-07 00:41:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:24,495 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-07 00:41:24,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-07 00:41:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 00:41:24,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:24,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:24,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:41:24,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash 982288804, now seen corresponding path program 1 times [2020-11-07 00:41:24,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:24,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643960291] [2020-11-07 00:41:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:24,501 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:41:24,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643960291] [2020-11-07 00:41:24,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:24,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:41:24,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216456624] [2020-11-07 00:41:24,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:41:24,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:24,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:41:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:41:24,702 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-11-07 00:41:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:25,194 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-11-07 00:41:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:41:25,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-07 00:41:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:25,196 INFO L225 Difference]: With dead ends: 59 [2020-11-07 00:41:25,197 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 00:41:25,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:41:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 00:41:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-11-07 00:41:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-07 00:41:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-07 00:41:25,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 34 [2020-11-07 00:41:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:25,213 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-07 00:41:25,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:41:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-07 00:41:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:41:25,215 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:25,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:25,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:41:25,216 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash 935446002, now seen corresponding path program 1 times [2020-11-07 00:41:25,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:25,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501755747] [2020-11-07 00:41:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:25,220 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:25,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501755747] [2020-11-07 00:41:25,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:25,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:41:25,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017735422] [2020-11-07 00:41:25,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:41:25,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:41:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:41:25,435 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 6 states. [2020-11-07 00:41:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:25,789 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-11-07 00:41:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:41:25,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-11-07 00:41:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:25,792 INFO L225 Difference]: With dead ends: 79 [2020-11-07 00:41:25,792 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 00:41:25,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:41:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 00:41:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-11-07 00:41:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 00:41:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-11-07 00:41:25,810 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 43 [2020-11-07 00:41:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:25,811 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-11-07 00:41:25,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:41:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-11-07 00:41:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:41:25,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:25,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:25,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:41:25,813 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1355534926, now seen corresponding path program 1 times [2020-11-07 00:41:25,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:25,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571969375] [2020-11-07 00:41:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:25,817 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:41:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:41:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:25,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:41:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:41:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:41:26,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571969375] [2020-11-07 00:41:26,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:41:26,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:41:26,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652292347] [2020-11-07 00:41:26,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:41:26,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:41:26,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:41:26,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:41:26,029 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 9 states. [2020-11-07 00:41:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:26,684 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-11-07 00:41:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:41:26,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-11-07 00:41:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:26,688 INFO L225 Difference]: With dead ends: 85 [2020-11-07 00:41:26,688 INFO L226 Difference]: Without dead ends: 65 [2020-11-07 00:41:26,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:41:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-07 00:41:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-11-07 00:41:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-07 00:41:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-11-07 00:41:26,707 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 43 [2020-11-07 00:41:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:26,707 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-11-07 00:41:26,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:41:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-11-07 00:41:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:41:26,709 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:26,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:26,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:41:26,710 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1484823182, now seen corresponding path program 1 times [2020-11-07 00:41:26,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:26,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044172794] [2020-11-07 00:41:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:26,713 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:41:26,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:41:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:41:26,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:41:26,775 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:41:26,775 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:41:26,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:41:26,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:41:26 BoogieIcfgContainer [2020-11-07 00:41:26,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:41:26,797 INFO L168 Benchmark]: Toolchain (without parser) took 4959.60 ms. Allocated memory was 169.9 MB in the beginning and 210.8 MB in the end (delta: 40.9 MB). Free memory was 126.0 MB in the beginning and 86.0 MB in the end (delta: 40.1 MB). Peak memory consumption was 82.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:26,798 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 169.9 MB. Free memory is still 142.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:41:26,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.11 ms. Allocated memory is still 169.9 MB. Free memory was 153.3 MB in the beginning and 144.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:26,800 INFO L168 Benchmark]: Boogie Preprocessor took 47.96 ms. Allocated memory is still 169.9 MB. Free memory was 144.2 MB in the beginning and 142.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:26,800 INFO L168 Benchmark]: RCFGBuilder took 392.82 ms. Allocated memory is still 169.9 MB. Free memory was 142.8 MB in the beginning and 139.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:26,801 INFO L168 Benchmark]: TraceAbstraction took 4163.47 ms. Allocated memory was 169.9 MB in the beginning and 210.8 MB in the end (delta: 40.9 MB). Free memory was 138.9 MB in the beginning and 86.0 MB in the end (delta: 53.0 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:26,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 169.9 MB. Free memory is still 142.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 299.11 ms. Allocated memory is still 169.9 MB. Free memory was 153.3 MB in the beginning and 144.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.96 ms. Allocated memory is still 169.9 MB. Free memory was 144.2 MB in the beginning and 142.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 392.82 ms. Allocated memory is still 169.9 MB. Free memory was 142.8 MB in the beginning and 139.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4163.47 ms. Allocated memory was 169.9 MB in the beginning and 210.8 MB in the end (delta: 40.9 MB). Free memory was 138.9 MB in the beginning and 86.0 MB in the end (delta: 53.0 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] unsigned int input = __VERIFIER_nondet_uint(); [L25] CALL, EXPR id(input) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L17] COND FALSE !(x==0) [L18] CALL, EXPR id(x-1) [L10] COND TRUE x==0 [L10] return 0; [L18] RET, EXPR id(x-1) [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; [L11] RET, EXPR id2(x-1) [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; [L25] RET, EXPR id(input) [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 [L27] CALL reach_error() [L4] __assert_fail("0", "id2_b3_o2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 215 SDtfs, 191 SDslu, 358 SDs, 0 SdLazy, 784 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...