/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:14:04,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:14:04,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:14:04,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:14:04,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:14:04,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:14:04,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:14:04,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:14:04,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:14:04,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:14:04,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:14:04,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:14:04,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:14:04,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:14:04,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:14:04,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:14:04,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:14:04,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:14:04,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:14:04,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:14:04,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:14:04,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:14:04,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:14:04,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:14:04,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:14:04,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:14:04,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:14:04,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:14:04,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:14:04,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:14:04,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:14:04,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:14:04,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:14:04,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:14:04,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:14:04,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:14:04,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:14:04,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:14:04,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:14:04,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:14:04,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:14:04,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:14:04,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:14:04,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:14:04,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:14:04,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:14:04,648 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:14:04,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:14:04,648 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:14:04,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:14:04,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:14:04,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:14:04,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:14:04,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:14:04,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:14:04,650 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:14:04,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:14:04,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:14:04,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:14:04,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:14:04,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:14:04,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:14:04,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:14:04,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:14:04,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:14:04,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:14:04,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:14:04,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:14:04,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:14:04,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:14:04,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:14:04,653 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:14:05,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:14:05,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:14:05,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:14:05,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:14:05,109 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:14:05,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-27 20:14:05,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b1ac58c4/a1064e0c7a9b4b48a8b930471d94bacd/FLAG6b3a4f382 [2020-10-27 20:14:05,863 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:14:05,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-27 20:14:05,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b1ac58c4/a1064e0c7a9b4b48a8b930471d94bacd/FLAG6b3a4f382 [2020-10-27 20:14:06,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b1ac58c4/a1064e0c7a9b4b48a8b930471d94bacd [2020-10-27 20:14:06,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:14:06,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:14:06,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:14:06,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:14:06,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:14:06,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff699de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06, skipping insertion in model container [2020-10-27 20:14:06,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:14:06,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:14:06,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:14:06,458 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:14:06,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:14:06,492 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:14:06,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06 WrapperNode [2020-10-27 20:14:06,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:14:06,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:14:06,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:14:06,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:14:06,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... [2020-10-27 20:14:06,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:14:06,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:14:06,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:14:06,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:14:06,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-27 20:14:06,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:14:06,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:14:06,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:14:06,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:14:06,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:14:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:14:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:14:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:14:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:14:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:14:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:14:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:14:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:14:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:14:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:14:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:14:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:14:06,911 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:14:06,911 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:14:06,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:14:06 BoogieIcfgContainer [2020-10-27 20:14:06,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:14:06,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:14:06,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:14:06,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:14:06,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:14:06" (1/3) ... [2020-10-27 20:14:06,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717f221a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:14:06, skipping insertion in model container [2020-10-27 20:14:06,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:14:06" (2/3) ... [2020-10-27 20:14:06,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@717f221a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:14:06, skipping insertion in model container [2020-10-27 20:14:06,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:14:06" (3/3) ... [2020-10-27 20:14:06,939 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-10-27 20:14:06,971 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:14:06,980 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:14:07,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:14:07,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:14:07,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:14:07,051 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:14:07,051 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:14:07,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:14:07,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:14:07,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:14:07,052 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:14:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 20:14:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:14:07,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:07,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:07,093 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:07,102 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 20:14:07,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:07,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724763559] [2020-10-27 20:14:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:07,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:07,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:07,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:07,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:14:07,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:07,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 20:14:07,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:14:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:07,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 20:14:07,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:07,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:07,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:07,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:07,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:07,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:14:07,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:07,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:14:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724763559] [2020-10-27 20:14:07,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:14:07,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:14:07,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858534699] [2020-10-27 20:14:07,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:14:07,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:14:07,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:14:07,876 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 20:14:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:07,958 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 20:14:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:14:07,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:14:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:07,967 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:14:07,968 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 20:14:07,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:14:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 20:14:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 20:14:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 20:14:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 20:14:08,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 20:14:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:08,014 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 20:14:08,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:14:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 20:14:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:14:08,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:08,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:08,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:14:08,016 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 20:14:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:08,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596415543] [2020-10-27 20:14:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:08,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:08,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:14:08,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:08,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 20:14:08,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:08,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:14:08,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:08,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:14:08,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:08,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:08,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:08,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:08,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:14:08,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:08,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:08,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:14:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:08,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596415543] [2020-10-27 20:14:08,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:14:08,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:14:08,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575191982] [2020-10-27 20:14:08,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:14:08,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:14:08,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:14:08,405 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-10-27 20:14:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:08,584 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 20:14:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:14:08,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 20:14:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:08,586 INFO L225 Difference]: With dead ends: 20 [2020-10-27 20:14:08,586 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 20:14:08,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:14:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 20:14:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 20:14:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 20:14:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 20:14:08,596 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 20:14:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:08,597 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 20:14:08,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:14:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 20:14:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:14:08,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:08,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:08,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:14:08,598 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:08,599 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 20:14:08,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:08,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385154208] [2020-10-27 20:14:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:08,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:08,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:08,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:14:08,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:08,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 20:14:08,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:08,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:14:08,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:08,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:14:08,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:09,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:09,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:09,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:14:09,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:09,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385154208] [2020-10-27 20:14:09,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:09,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:14:09,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355982183] [2020-10-27 20:14:09,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:14:09,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:09,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:14:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:14:09,083 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-27 20:14:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:09,324 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 20:14:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:14:09,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-27 20:14:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:09,325 INFO L225 Difference]: With dead ends: 21 [2020-10-27 20:14:09,326 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:14:09,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:14:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:14:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:14:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:14:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:14:09,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:14:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:09,333 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:14:09,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:14:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:14:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:14:09,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:09,334 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:09,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:14:09,335 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 20:14:09,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:09,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895384061] [2020-10-27 20:14:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:09,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:14:09,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:09,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 20:14:09,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:14:09,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:09,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:14:09,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:14:09,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:09,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:09,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:09,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 20:14:09,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:09,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:09,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:09,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895384061] [2020-10-27 20:14:09,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:09,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:14:09,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159431884] [2020-10-27 20:14:09,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:14:09,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:14:09,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:14:09,747 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-27 20:14:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:10,070 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 20:14:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:14:10,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-27 20:14:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:10,071 INFO L225 Difference]: With dead ends: 22 [2020-10-27 20:14:10,071 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:14:10,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:14:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:14:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:14:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:14:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:14:10,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 20:14:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:10,088 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:14:10,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:14:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:14:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:14:10,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:10,089 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:10,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:14:10,089 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 20:14:10,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:10,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727976972] [2020-10-27 20:14:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:10,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:10,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:10,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:14:10,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:10,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 20:14:10,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:14:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:14:10,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:10,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:10,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:10,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:10,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:10,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:10,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:10,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:10,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727976972] [2020-10-27 20:14:10,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:10,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:14:10,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294018638] [2020-10-27 20:14:10,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:14:10,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:14:10,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:14:10,416 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-27 20:14:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:10,686 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 20:14:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:14:10,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-27 20:14:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:10,687 INFO L225 Difference]: With dead ends: 23 [2020-10-27 20:14:10,687 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:14:10,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:14:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:14:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 20:14:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:14:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 20:14:10,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 20:14:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:10,695 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 20:14:10,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:14:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 20:14:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:14:10,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:10,696 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:10,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:14:10,696 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 20:14:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:10,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838713645] [2020-10-27 20:14:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:10,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:10,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:11,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:14:11,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 20:14:11,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:11,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:14:11,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:14:11,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:11,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:11,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:11,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:11,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:14:11,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:11,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:11,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838713645] [2020-10-27 20:14:11,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:11,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:14:11,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181161744] [2020-10-27 20:14:11,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:14:11,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:11,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:14:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:14:11,154 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-27 20:14:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:11,527 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:14:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:14:11,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-27 20:14:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:11,529 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:14:11,529 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:14:11,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:14:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:14:11,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:14:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:14:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 20:14:11,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 20:14:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:11,536 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 20:14:11,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:14:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 20:14:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:14:11,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:11,537 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:11,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:14:11,537 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 20:14:11,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:11,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451046330] [2020-10-27 20:14:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:11,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:14:11,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:14:11,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-27 20:14:11,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:14:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:14:11,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:11,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:11,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:11,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:11,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:11,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:14:11,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:11,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:11,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:11,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:11,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:11,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451046330] [2020-10-27 20:14:12,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:12,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:14:12,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841775575] [2020-10-27 20:14:12,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:14:12,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:12,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:14:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:14:12,002 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 20:14:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:12,349 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 20:14:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:14:12,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 20:14:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:12,351 INFO L225 Difference]: With dead ends: 25 [2020-10-27 20:14:12,351 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:14:12,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:14:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:14:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 20:14:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:14:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 20:14:12,359 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 20:14:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:12,360 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 20:14:12,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:14:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 20:14:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:14:12,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:12,361 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:12,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:14:12,361 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 20:14:12,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:12,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129441700] [2020-10-27 20:14:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 20:14:12,375 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 20:14:12,375 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:14:12,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:14:12,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:14:12 BoogieIcfgContainer [2020-10-27 20:14:12,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:14:12,397 INFO L168 Benchmark]: Toolchain (without parser) took 6154.92 ms. Allocated memory was 167.8 MB in the beginning and 242.2 MB in the end (delta: 74.4 MB). Free memory was 143.0 MB in the beginning and 178.8 MB in the end (delta: -35.8 MB). Peak memory consumption was 39.2 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:12,398 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 167.8 MB. Free memory is still 139.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:14:12,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.15 ms. Allocated memory is still 167.8 MB. Free memory was 142.5 MB in the beginning and 133.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:12,399 INFO L168 Benchmark]: Boogie Preprocessor took 36.71 ms. Allocated memory is still 167.8 MB. Free memory was 133.4 MB in the beginning and 132.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:12,400 INFO L168 Benchmark]: RCFGBuilder took 382.53 ms. Allocated memory is still 167.8 MB. Free memory was 132.0 MB in the beginning and 120.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:12,401 INFO L168 Benchmark]: TraceAbstraction took 5474.69 ms. Allocated memory was 167.8 MB in the beginning and 242.2 MB in the end (delta: 74.4 MB). Free memory was 119.7 MB in the beginning and 178.8 MB in the end (delta: -59.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. [2020-10-27 20:14:12,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 167.8 MB. Free memory is still 139.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.15 ms. Allocated memory is still 167.8 MB. Free memory was 142.5 MB in the beginning and 133.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.71 ms. Allocated memory is still 167.8 MB. Free memory was 133.4 MB in the beginning and 132.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 382.53 ms. Allocated memory is still 167.8 MB. Free memory was 132.0 MB in the beginning and 120.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5474.69 ms. Allocated memory was 167.8 MB in the beginning and 242.2 MB in the end (delta: 74.4 MB). Free memory was 119.7 MB in the beginning and 178.8 MB in the end (delta: -59.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(y != 64) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "underapprox_1-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 60 SDslu, 172 SDs, 0 SdLazy, 270 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 7054 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...