/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:01:35,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:01:35,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:01:35,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:01:35,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:01:35,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:01:35,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:01:35,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:01:35,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:01:35,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:01:35,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:01:35,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:01:35,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:01:35,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:01:35,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:01:35,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:01:35,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:01:35,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:01:35,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:01:35,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:01:35,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:01:35,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:01:35,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:01:35,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:01:35,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:01:35,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:01:35,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:01:35,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:01:35,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:01:35,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:01:35,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:01:35,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:01:35,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:01:35,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:01:35,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:01:35,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:01:35,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:01:35,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:01:35,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:01:35,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:01:35,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:01:35,534 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 [2020-10-28 15:01:35,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:01:35,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:01:35,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:01:35,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:01:35,609 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:01:35,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:01:35,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:01:35,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:01:35,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:01:35,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:01:35,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:01:35,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:01:35,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:01:35,613 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:01:35,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:01:35,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:01:35,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:01:35,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:01:35,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:01:35,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:01:35,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:01:35,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:01:35,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:01:35,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:01:35,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:01:35,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:01:35,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:01:35,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:01:35,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:01:35,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:01:36,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:01:36,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:01:36,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:01:36,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:01:36,075 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:01:36,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-10-28 15:01:36,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d37c5e0a/b2da26d8603348c1954f53b4d8f8433c/FLAG18c08a8f1 [2020-10-28 15:01:36,874 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:01:36,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-10-28 15:01:36,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d37c5e0a/b2da26d8603348c1954f53b4d8f8433c/FLAG18c08a8f1 [2020-10-28 15:01:37,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d37c5e0a/b2da26d8603348c1954f53b4d8f8433c [2020-10-28 15:01:37,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:01:37,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:01:37,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:01:37,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:01:37,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:01:37,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd7294c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37, skipping insertion in model container [2020-10-28 15:01:37,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:01:37,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:01:37,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:01:37,492 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:01:37,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:01:37,534 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:01:37,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37 WrapperNode [2020-10-28 15:01:37,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:01:37,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:01:37,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:01:37,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:01:37,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (1/1) ... [2020-10-28 15:01:37,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:01:37,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:01:37,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:01:37,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:01:37,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (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 [2020-10-28 15:01:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:01:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:01:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:01:37,682 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:01:37,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:01:37,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:01:37,682 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:01:37,682 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:01:37,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:01:37,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:01:37,683 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:01:37,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:01:37,683 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:01:37,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:01:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:01:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:01:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:01:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:01:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:01:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:01:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:01:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:01:38,242 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:01:38,242 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:01:38,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:01:38 BoogieIcfgContainer [2020-10-28 15:01:38,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:01:38,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:01:38,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:01:38,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:01:38,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:01:37" (1/3) ... [2020-10-28 15:01:38,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f265ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:01:38, skipping insertion in model container [2020-10-28 15:01:38,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:37" (2/3) ... [2020-10-28 15:01:38,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f265ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:01:38, skipping insertion in model container [2020-10-28 15:01:38,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:01:38" (3/3) ... [2020-10-28 15:01:38,297 INFO L111 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-10-28 15:01:38,342 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:01:38,348 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:01:38,370 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:01:38,403 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:01:38,404 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:01:38,404 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:01:38,404 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:01:38,404 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:01:38,404 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:01:38,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:01:38,405 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:01:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-28 15:01:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:01:38,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:38,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:38,436 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash -163533008, now seen corresponding path program 1 times [2020-10-28 15:01:38,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:38,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144786852] [2020-10-28 15:01:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:38,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:38,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:38,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:01:38,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:38,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 15:01:38,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:38,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:38,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:01:38,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:38,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:01:38,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:01:39,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:39,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:39,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:39,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:39,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:39,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:01:39,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:39,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:39,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144786852] [2020-10-28 15:01:39,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:39,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:39,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916028151] [2020-10-28 15:01:39,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:39,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:39,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:39,075 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-28 15:01:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:39,422 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-10-28 15:01:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:01:39,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 15:01:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:39,434 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:01:39,435 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:01:39,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:01:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:01:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 15:01:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:01:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 15:01:39,522 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-28 15:01:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:39,523 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 15:01:39,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 15:01:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:01:39,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:39,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:39,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:01:39,525 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1958743745, now seen corresponding path program 1 times [2020-10-28 15:01:39,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:39,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881848608] [2020-10-28 15:01:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:39,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:39,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:39,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:01:39,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:39,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-28 15:01:39,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:39,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:39,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:01:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:01:39,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-10-28 15:01:39,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:39,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:39,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:39,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:39,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:39,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:01:39,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:39,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:39,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:39,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:39,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881848608] [2020-10-28 15:01:39,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:39,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:01:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325799258] [2020-10-28 15:01:39,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:01:39,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:01:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:39,987 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2020-10-28 15:01:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:40,387 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-28 15:01:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:01:40,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 15:01:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:40,391 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:01:40,391 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:01:40,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:01:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:01:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-28 15:01:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:01:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-28 15:01:40,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2020-10-28 15:01:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:40,409 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-28 15:01:40,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:01:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-28 15:01:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:01:40,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:40,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:40,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:01:40,411 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:40,412 INFO L82 PathProgramCache]: Analyzing trace with hash -175634455, now seen corresponding path program 1 times [2020-10-28 15:01:40,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:40,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453513172] [2020-10-28 15:01:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:40,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:40,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:01:40,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 15:01:40,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:40,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:01:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:40,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:01:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:40,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:40,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:40,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:40,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:40,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:40,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:01:40,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:40,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:40,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453513172] [2020-10-28 15:01:40,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:40,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:01:40,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399705061] [2020-10-28 15:01:40,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:01:40,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:01:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:40,650 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2020-10-28 15:01:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:41,102 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-28 15:01:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:01:41,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 15:01:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:41,106 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:01:41,107 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 15:01:41,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:01:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 15:01:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-28 15:01:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:01:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-28 15:01:41,119 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 20 [2020-10-28 15:01:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:41,119 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-28 15:01:41,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:01:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-28 15:01:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:01:41,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:41,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:41,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:01:41,121 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash -568661465, now seen corresponding path program 1 times [2020-10-28 15:01:41,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:41,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23541869] [2020-10-28 15:01:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:41,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:41,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:41,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:01:41,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:41,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 15:01:41,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:41,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:41,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:01:41,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:41,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:01:41,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:41,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:41,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:41,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:41,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:41,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:41,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:41,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:41,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:41,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:41,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23541869] [2020-10-28 15:01:41,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:41,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:01:41,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957805499] [2020-10-28 15:01:41,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:01:41,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:41,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:01:41,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:41,335 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-10-28 15:01:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:41,744 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-28 15:01:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:01:41,745 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 15:01:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:41,746 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:01:41,747 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 15:01:41,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:01:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 15:01:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-10-28 15:01:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:01:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2020-10-28 15:01:41,759 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 20 [2020-10-28 15:01:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:41,759 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2020-10-28 15:01:41,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:01:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2020-10-28 15:01:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:01:41,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:41,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:41,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:01:41,761 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1597716218, now seen corresponding path program 1 times [2020-10-28 15:01:41,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:41,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316988459] [2020-10-28 15:01:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:41,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:41,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:41,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:42,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:01:42,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:01:42,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-28 15:01:42,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:42,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:42,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:01:42,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:42,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:01:42,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:01:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:42,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:42,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:42,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:42,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:42,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:42,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316988459] [2020-10-28 15:01:42,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:42,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:01:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552868140] [2020-10-28 15:01:42,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:42,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:42,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:42,347 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand 6 states. [2020-10-28 15:01:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:42,530 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-28 15:01:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:42,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 15:01:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:42,531 INFO L225 Difference]: With dead ends: 69 [2020-10-28 15:01:42,532 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 15:01:42,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:01:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 15:01:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-28 15:01:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:01:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 15:01:42,540 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-28 15:01:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:42,541 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 15:01:42,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 15:01:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:01:42,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:42,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:42,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:01:42,542 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 764253185, now seen corresponding path program 1 times [2020-10-28 15:01:42,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:42,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160960070] [2020-10-28 15:01:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:43,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:43,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:01:43,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:01:43,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-28 15:01:43,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:43,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:43,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:01:43,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:43,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:01:43,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:43,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:43,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:43,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:43,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:43,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:43,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:01:43,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:43,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:43,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:43,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:43,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:43,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:43,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 15:01:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:43,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:43,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:43,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:43,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:43,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:43,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:43,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:01:43,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:43,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:01:43,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:43,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160960070] [2020-10-28 15:01:43,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:43,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:01:43,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387105682] [2020-10-28 15:01:43,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:01:43,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:01:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:43,305 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-28 15:01:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:43,632 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-28 15:01:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:01:43,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-28 15:01:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:43,633 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:01:43,633 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:01:43,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:01:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:01:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:01:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:01:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:01:43,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-10-28 15:01:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:43,635 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:01:43,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:01:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:01:43,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:01:43,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:01:43,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:01:44,013 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-28 15:01:44,190 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2020-10-28 15:01:44,290 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-28 15:01:44,290 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-28 15:01:44,290 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 15:01:44,290 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-28 15:01:44,291 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-28 15:01:44,291 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:01:44,291 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-28 15:01:44,291 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:01:44,291 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:01:44,291 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:01:44,291 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:01:44,291 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:01:44,292 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-28 15:01:44,292 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:01:44,292 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:01:44,292 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:01:44,292 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-28 15:01:44,292 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 52) no Hoare annotation was computed. [2020-10-28 15:01:44,292 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 52) no Hoare annotation was computed. [2020-10-28 15:01:44,293 INFO L270 CegarLoopResult]: At program point L46-2(lines 46 50) the Hoare annotation is: (let ((.cse1 (<= 4000 main_~c1~0)) (.cse0 (<= main_~n~0 main_~j~0)) (.cse2 (<= 1 main_~i~0)) (.cse3 (<= main_~n~0 1)) (.cse4 (<= 2000 main_~c2~0)) (.cse5 (<= 10000 main_~c3~0)) (.cse6 (<= main_~i~0 1))) (or (and .cse0 (<= main_~i~0 0) (<= main_~n~0 0)) (and .cse1 .cse2 (<= main_~n~0 (+ main_~j~0 1)) .cse3 (< 0 main_~k~0) .cse4 .cse5 .cse6) (and .cse1 .cse0 .cse2 .cse3 .cse4 .cse5 .cse6))) [2020-10-28 15:01:44,293 INFO L274 CegarLoopResult]: For program point L46-3(lines 46 50) no Hoare annotation was computed. [2020-10-28 15:01:44,293 INFO L274 CegarLoopResult]: For program point L40(lines 40 43) no Hoare annotation was computed. [2020-10-28 15:01:44,293 INFO L274 CegarLoopResult]: For program point L38(lines 38 43) no Hoare annotation was computed. [2020-10-28 15:01:44,293 INFO L270 CegarLoopResult]: At program point L40-2(lines 34 44) the Hoare annotation is: (let ((.cse0 (<= 4000 main_~c1~0)) (.cse1 (<= 2000 main_~c2~0)) (.cse2 (<= 10000 main_~c3~0))) (or (and .cse0 (<= main_~i~0 0) (<= 10000 (+ main_~c3~0 main_~k~0)) (<= 4000 (+ main_~c1~0 main_~k~0)) (<= 0 main_~i~0) (<= 2000 (+ main_~c2~0 main_~k~0)) .cse1 .cse2) (and .cse0 (<= 1 main_~i~0) (<= main_~n~0 1) (< 0 main_~k~0) .cse1 .cse2 (<= main_~i~0 1)))) [2020-10-28 15:01:44,293 INFO L274 CegarLoopResult]: For program point L34-2(lines 34 44) no Hoare annotation was computed. [2020-10-28 15:01:44,294 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 52) the Hoare annotation is: true [2020-10-28 15:01:44,294 INFO L270 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= 4000 main_~c1~0) (<= 1 main_~i~0) (<= main_~n~0 (+ main_~j~0 1)) (<= main_~n~0 1) (< 0 main_~k~0) (<= 2000 main_~c2~0) (<= 10000 main_~c3~0) (<= main_~i~0 1)) [2020-10-28 15:01:44,294 INFO L274 CegarLoopResult]: For program point L47-1(line 47) no Hoare annotation was computed. [2020-10-28 15:01:44,294 INFO L274 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-10-28 15:01:44,295 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-28 15:01:44,295 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-28 15:01:44,295 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-28 15:01:44,295 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 15:01:44,295 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-28 15:01:44,295 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-28 15:01:44,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:01:44 BoogieIcfgContainer [2020-10-28 15:01:44,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:01:44,339 INFO L168 Benchmark]: Toolchain (without parser) took 7092.54 ms. Allocated memory was 155.2 MB in the beginning and 234.9 MB in the end (delta: 79.7 MB). Free memory was 130.3 MB in the beginning and 93.7 MB in the end (delta: 36.6 MB). Peak memory consumption was 117.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:44,340 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 155.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:01:44,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.22 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 119.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:44,343 INFO L168 Benchmark]: Boogie Preprocessor took 43.81 ms. Allocated memory is still 155.2 MB. Free memory was 119.5 MB in the beginning and 118.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:44,345 INFO L168 Benchmark]: RCFGBuilder took 665.48 ms. Allocated memory is still 155.2 MB. Free memory was 118.0 MB in the beginning and 102.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:44,346 INFO L168 Benchmark]: TraceAbstraction took 6085.06 ms. Allocated memory was 155.2 MB in the beginning and 234.9 MB in the end (delta: 79.7 MB). Free memory was 101.7 MB in the beginning and 93.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:44,351 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 155.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.22 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 119.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.81 ms. Allocated memory is still 155.2 MB. Free memory was 119.5 MB in the beginning and 118.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 665.48 ms. Allocated memory is still 155.2 MB. Free memory was 118.0 MB in the beginning and 102.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6085.06 ms. Allocated memory was 155.2 MB in the beginning and 234.9 MB in the end (delta: 79.7 MB). Free memory was 101.7 MB in the beginning and 93.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((4000 <= c1 && i <= 0) && 10000 <= c3 + k) && 4000 <= c1 + k) && 0 <= i) && 2000 <= c2 + k) && 2000 <= c2) && 10000 <= c3) || ((((((4000 <= c1 && 1 <= i) && n <= 1) && 0 < k) && 2000 <= c2) && 10000 <= c3) && i <= 1) - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((n <= j && i <= 0) && n <= 0) || (((((((4000 <= c1 && 1 <= i) && n <= j + 1) && n <= 1) && 0 < k) && 2000 <= c2) && 10000 <= c3) && i <= 1)) || ((((((4000 <= c1 && n <= j) && 1 <= i) && n <= 1) && 2000 <= c2) && 10000 <= c3) && i <= 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 249 SDslu, 167 SDs, 0 SdLazy, 573 SolverSat, 91 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, 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, 6 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 23 PreInvPairs, 29 NumberOfFragments, 174 HoareAnnotationTreeSize, 23 FomulaSimplifications, 1161 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 10 FomulaSimplificationsInter, 206 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 7842 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 8/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...