/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=SHALLOWEST --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/float-benchs/drift_tenth.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:57:42,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:57:42,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:57:42,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:57:42,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:57:42,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:57:42,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:57:42,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:57:42,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:57:42,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:57:42,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:57:42,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:57:42,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:57:42,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:57:42,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:57:42,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:57:42,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:57:42,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:57:42,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:57:42,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:57:42,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:57:42,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:57:42,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:57:42,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:57:42,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:57:42,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:57:42,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:57:42,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:57:42,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:57:42,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:57:42,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:57:42,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:57:42,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:57:42,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:57:42,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:57:42,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:57:42,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:57:42,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:57:42,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:57:42,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:57:42,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:57:42,524 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 00:57:42,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:57:42,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:57:42,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:57:42,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:57:42,553 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:57:42,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:57:42,553 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:57:42,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:57:42,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:57:42,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:57:42,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:57:42,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:57:42,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:57:42,555 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:57:42,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:57:42,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:57:42,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:57:42,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:57:42,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:57:42,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:57:42,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:57:42,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:57:42,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:57:42,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:57:42,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:57:42,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:57:42,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:57:42,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:57:42,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:57:42,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:57:42,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:57:42,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:57:42,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:57:42,997 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:57:42,998 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:57:42,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-10-27 00:57:43,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/455a29968/45d7fb1df1384f9cbd7ed5b86cc9bcd1/FLAG2a4812149 [2020-10-27 00:57:43,652 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:57:43,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-10-27 00:57:43,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/455a29968/45d7fb1df1384f9cbd7ed5b86cc9bcd1/FLAG2a4812149 [2020-10-27 00:57:44,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/455a29968/45d7fb1df1384f9cbd7ed5b86cc9bcd1 [2020-10-27 00:57:44,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:57:44,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:57:44,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:57:44,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:57:44,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:57:44,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef61d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44, skipping insertion in model container [2020-10-27 00:57:44,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:57:44,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:57:44,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:57:44,321 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:57:44,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:57:44,353 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:57:44,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44 WrapperNode [2020-10-27 00:57:44,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:57:44,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:57:44,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:57:44,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:57:44,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (1/1) ... [2020-10-27 00:57:44,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:57:44,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:57:44,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:57:44,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:57:44,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (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 00:57:44,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:57:44,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:57:44,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:57:44,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:57:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:57:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:57:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:57:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:57:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 00:57:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:57:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:57:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:57:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:57:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:57:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:57:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:57:44,677 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:57:44,677 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 00:57:44,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:57:44 BoogieIcfgContainer [2020-10-27 00:57:44,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:57:44,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:57:44,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:57:44,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:57:44,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:57:44" (1/3) ... [2020-10-27 00:57:44,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6344e7d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:57:44, skipping insertion in model container [2020-10-27 00:57:44,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:57:44" (2/3) ... [2020-10-27 00:57:44,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6344e7d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:57:44, skipping insertion in model container [2020-10-27 00:57:44,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:57:44" (3/3) ... [2020-10-27 00:57:44,688 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2020-10-27 00:57:44,700 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:57:44,705 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:57:44,718 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:57:44,754 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:57:44,754 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:57:44,754 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:57:44,755 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:57:44,755 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:57:44,755 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:57:44,755 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:57:44,755 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:57:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-27 00:57:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 00:57:44,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:44,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:44,778 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash -643733030, now seen corresponding path program 1 times [2020-10-27 00:57:44,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:44,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466011422] [2020-10-27 00:57:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:45,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:45,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:45,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 00:57:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 00:57:45,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:57:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:57:45,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:57:45,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:45,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:45,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:45,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:45,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:45,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:57:45,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:45,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:45,374 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 00:57:45,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466011422] [2020-10-27 00:57:45,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:57:45,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:57:45,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243539954] [2020-10-27 00:57:45,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:57:45,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:45,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:57:45,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:57:45,406 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2020-10-27 00:57:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:45,595 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 00:57:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 00:57:45,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 00:57:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:45,606 INFO L225 Difference]: With dead ends: 27 [2020-10-27 00:57:45,606 INFO L226 Difference]: Without dead ends: 12 [2020-10-27 00:57:45,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:57:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-27 00:57:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-27 00:57:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-27 00:57:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-27 00:57:45,650 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-27 00:57:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:45,651 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-27 00:57:45,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:57:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-27 00:57:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 00:57:45,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:45,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:45,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:57:45,653 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1517168292, now seen corresponding path program 1 times [2020-10-27 00:57:45,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:45,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063363411] [2020-10-27 00:57:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:45,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:45,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:45,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 00:57:45,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:45,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-27 00:57:45,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 00:57:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 00:57:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:45,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:45,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:45,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:45,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:45,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:45,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 00:57:45,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:45,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:45,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:45,947 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 00:57:45,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063363411] [2020-10-27 00:57:45,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:45,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:57:45,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44343013] [2020-10-27 00:57:45,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:57:45,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:57:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:57:45,952 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-10-27 00:57:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:46,060 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-27 00:57:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:57:46,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-27 00:57:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:46,061 INFO L225 Difference]: With dead ends: 17 [2020-10-27 00:57:46,062 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 00:57:46,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:57:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 00:57:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 00:57:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 00:57:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 00:57:46,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-27 00:57:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:46,070 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 00:57:46,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:57:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 00:57:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 00:57:46,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:46,072 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:46,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:57:46,072 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash -214367462, now seen corresponding path program 2 times [2020-10-27 00:57:46,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:46,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424417861] [2020-10-27 00:57:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:46,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:46,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 00:57:46,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 00:57:46,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:57:46,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:46,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 00:57:46,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:57:46,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:46,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:46,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:46,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:46,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:57:46,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:46,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:46,278 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 00:57:46,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424417861] [2020-10-27 00:57:46,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:46,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:57:46,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853020845] [2020-10-27 00:57:46,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:57:46,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:46,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:57:46,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:57:46,281 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-10-27 00:57:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:46,447 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-27 00:57:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:57:46,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 00:57:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:46,448 INFO L225 Difference]: With dead ends: 18 [2020-10-27 00:57:46,449 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 00:57:46,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:57:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 00:57:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 00:57:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 00:57:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 00:57:46,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 00:57:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:46,463 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 00:57:46,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:57:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 00:57:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 00:57:46,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:46,464 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:46,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:57:46,464 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1942599012, now seen corresponding path program 3 times [2020-10-27 00:57:46,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:46,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107497392] [2020-10-27 00:57:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:46,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:46,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:46,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 00:57:46,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:46,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 00:57:46,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:57:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 00:57:46,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:46,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:46,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:46,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:46,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:46,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:57:46,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:46,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:46,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:46,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:46,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:46,645 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 00:57:46,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107497392] [2020-10-27 00:57:46,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:46,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:57:46,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413449657] [2020-10-27 00:57:46,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:57:46,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:46,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:57:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:57:46,649 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-27 00:57:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:46,807 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-27 00:57:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:57:46,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-27 00:57:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:46,808 INFO L225 Difference]: With dead ends: 19 [2020-10-27 00:57:46,808 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 00:57:46,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:57:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 00:57:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 00:57:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 00:57:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 00:57:46,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 00:57:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:46,815 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 00:57:46,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:57:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 00:57:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 00:57:46,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:46,816 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:46,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:57:46,817 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash 89082970, now seen corresponding path program 4 times [2020-10-27 00:57:46,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:46,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003354133] [2020-10-27 00:57:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:46,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:46,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:46,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 00:57:46,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:46,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 00:57:46,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:57:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 00:57:46,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:47,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:47,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:47,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:47,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:47,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:57:47,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:47,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:47,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:47,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:47,025 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 00:57:47,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003354133] [2020-10-27 00:57:47,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:47,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:57:47,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602916469] [2020-10-27 00:57:47,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:57:47,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:47,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:57:47,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:57:47,028 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-27 00:57:47,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:47,259 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 00:57:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:57:47,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-27 00:57:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:47,260 INFO L225 Difference]: With dead ends: 20 [2020-10-27 00:57:47,260 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 00:57:47,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:57:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 00:57:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 00:57:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 00:57:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 00:57:47,267 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 00:57:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:47,267 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 00:57:47,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:57:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 00:57:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 00:57:47,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:47,268 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:47,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:57:47,269 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1535339484, now seen corresponding path program 5 times [2020-10-27 00:57:47,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:47,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113548141] [2020-10-27 00:57:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:47,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:47,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 00:57:47,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:47,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 00:57:47,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 00:57:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 00:57:47,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:47,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:47,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:47,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:47,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:47,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:57:47,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:47,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:47,458 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 00:57:47,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113548141] [2020-10-27 00:57:47,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:47,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:57:47,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692539886] [2020-10-27 00:57:47,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:57:47,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:57:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:57:47,461 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-27 00:57:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:47,751 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 00:57:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:57:47,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-27 00:57:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:47,753 INFO L225 Difference]: With dead ends: 21 [2020-10-27 00:57:47,753 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 00:57:47,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:57:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 00:57:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 00:57:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 00:57:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 00:57:47,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 00:57:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:47,760 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 00:57:47,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:57:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 00:57:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 00:57:47,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:47,761 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:47,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:57:47,762 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:47,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:47,762 INFO L82 PathProgramCache]: Analyzing trace with hash -352828006, now seen corresponding path program 6 times [2020-10-27 00:57:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:47,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279553249] [2020-10-27 00:57:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:47,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:47,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:47,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 00:57:47,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:47,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 00:57:47,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:47,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:57:47,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:47,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 00:57:47,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:48,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:48,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:48,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:48,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:48,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:57:48,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:48,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:48,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:48,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:57:48,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279553249] [2020-10-27 00:57:48,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:48,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:57:48,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707934306] [2020-10-27 00:57:48,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:57:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:57:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:57:48,041 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-27 00:57:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:48,365 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 00:57:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:57:48,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-27 00:57:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:48,367 INFO L225 Difference]: With dead ends: 22 [2020-10-27 00:57:48,367 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 00:57:48,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:57:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 00:57:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 00:57:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 00:57:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 00:57:48,374 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 00:57:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:48,374 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 00:57:48,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:57:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 00:57:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 00:57:48,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:48,375 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:48,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:57:48,375 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1945289444, now seen corresponding path program 7 times [2020-10-27 00:57:48,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:48,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532761523] [2020-10-27 00:57:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:48,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:48,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 00:57:48,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:48,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 00:57:48,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:57:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 00:57:48,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:48,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:48,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:48,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:48,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:57:48,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:48,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:48,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:57:48,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532761523] [2020-10-27 00:57:48,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:48,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 00:57:48,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114024640] [2020-10-27 00:57:48,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 00:57:48,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 00:57:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:57:48,647 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2020-10-27 00:57:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:48,979 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 00:57:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:57:48,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-27 00:57:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:48,996 INFO L225 Difference]: With dead ends: 23 [2020-10-27 00:57:48,997 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 00:57:48,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 00:57:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 00:57:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 00:57:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 00:57:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 00:57:49,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 00:57:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:49,003 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 00:57:49,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 00:57:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 00:57:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 00:57:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:49,004 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:49,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:57:49,004 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash 172486362, now seen corresponding path program 8 times [2020-10-27 00:57:49,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:49,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280684510] [2020-10-27 00:57:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:49,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:49,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:49,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 00:57:49,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:49,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 00:57:49,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:49,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 00:57:49,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:49,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 00:57:49,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:49,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:49,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:49,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:49,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:49,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:49,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:57:49,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:57:49,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280684510] [2020-10-27 00:57:49,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:49,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 00:57:49,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156103598] [2020-10-27 00:57:49,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 00:57:49,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 00:57:49,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:57:49,297 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2020-10-27 00:57:49,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:49,731 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 00:57:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:57:49,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-27 00:57:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:49,732 INFO L225 Difference]: With dead ends: 24 [2020-10-27 00:57:49,732 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 00:57:49,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 00:57:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 00:57:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 00:57:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 00:57:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 00:57:49,739 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-27 00:57:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:49,739 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 00:57:49,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 00:57:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 00:57:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 00:57:49,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:49,740 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:49,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:57:49,741 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1050165668, now seen corresponding path program 9 times [2020-10-27 00:57:49,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:49,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451128070] [2020-10-27 00:57:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:49,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:49,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:49,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 00:57:49,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:49,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 00:57:49,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:57:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 00:57:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 00:57:49,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:50,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:57:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:57:50,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:57:50,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:57:50,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:57:50,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:57:50,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:57:50,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:57:50,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:57:50,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:57:50,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:57:50,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:57:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:57:50,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451128070] [2020-10-27 00:57:50,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:57:50,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 00:57:50,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179956837] [2020-10-27 00:57:50,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 00:57:50,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:57:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 00:57:50,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:57:50,031 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 13 states. [2020-10-27 00:57:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:57:50,487 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 00:57:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:57:50,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-10-27 00:57:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:57:50,488 INFO L225 Difference]: With dead ends: 25 [2020-10-27 00:57:50,488 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 00:57:50,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:57:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 00:57:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 00:57:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 00:57:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 00:57:50,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-27 00:57:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:57:50,495 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 00:57:50,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 00:57:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 00:57:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 00:57:50,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:57:50,496 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:57:50,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 00:57:50,496 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:57:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:57:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1806546918, now seen corresponding path program 10 times [2020-10-27 00:57:50,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:57:50,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127170002] [2020-10-27 00:57:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:57:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 00:57:50,507 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 00:57:50,507 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 00:57:50,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 00:57:50,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:57:50 BoogieIcfgContainer [2020-10-27 00:57:50,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 00:57:50,530 INFO L168 Benchmark]: Toolchain (without parser) took 6478.36 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.4 MB in the beginning and 195.1 MB in the end (delta: -68.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 00:57:50,531 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 00:57:50,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 00:57:50,533 INFO L168 Benchmark]: Boogie Preprocessor took 31.59 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 00:57:50,533 INFO L168 Benchmark]: RCFGBuilder took 292.63 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 103.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 00:57:50,534 INFO L168 Benchmark]: TraceAbstraction took 5846.73 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 103.0 MB in the beginning and 195.1 MB in the end (delta: -92.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 00:57:50,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.59 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.63 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 103.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5846.73 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 103.0 MB in the beginning and 195.1 MB in the end (delta: -92.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 16. Possible FailurePath: [L1] int __return_main; [L9] float main__tick = 0.10000000149011612; [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 [L27] COND TRUE __VERIFIER_assert__cond == 0 [L29] CALL reach_error() [L4] __assert_fail("0", "drift_tenth.c.p+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 52 SDslu, 248 SDs, 0 SdLazy, 269 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 8010 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/165 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...