/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:14,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:14,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:14,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:14,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:14,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:14,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:14,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:14,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:14,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:14,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:14,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:14,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:14,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:14,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:14,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:14,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:14,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:14,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:14,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:14,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:14,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:14,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:14,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:14,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:14,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:14,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:14,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:14,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:14,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:14,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:14,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:14,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:14,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:14,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:14,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:14,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:14,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:14,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:14,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:14,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:14,499 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 [2020-09-24 21:40:14,542 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:14,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:14,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:14,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:14,545 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:14,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:14,546 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:14,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:14,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:14,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:14,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:14,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:14,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:14,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:14,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:14,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:14,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:14,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:14,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:14,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:14,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:14,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:14,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:14,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:14,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:14,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:14,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:14,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:14,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:14,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:40:14,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:15,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:15,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:15,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:15,031 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:15,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2020-09-24 21:40:15,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6aa96162/2eda6ffda8c8462b8262d15a4531b861/FLAG520e5a49a [2020-09-24 21:40:15,763 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:15,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2020-09-24 21:40:15,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6aa96162/2eda6ffda8c8462b8262d15a4531b861/FLAG520e5a49a [2020-09-24 21:40:16,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6aa96162/2eda6ffda8c8462b8262d15a4531b861 [2020-09-24 21:40:16,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:16,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:16,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:16,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:16,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:16,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16, skipping insertion in model container [2020-09-24 21:40:16,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:16,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:16,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:16,621 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:16,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:16,871 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:16,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16 WrapperNode [2020-09-24 21:40:16,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:16,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:16,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:16,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:16,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:17,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:17,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:17,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:17,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:17,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:17,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (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 [2020-09-24 21:40:17,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:17,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:17,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:17,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:17,128 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:17,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:18,814 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:18,814 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:18,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:18 BoogieIcfgContainer [2020-09-24 21:40:18,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:18,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:18,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:18,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:18,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:16" (1/3) ... [2020-09-24 21:40:18,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:18, skipping insertion in model container [2020-09-24 21:40:18,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (2/3) ... [2020-09-24 21:40:18,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:18, skipping insertion in model container [2020-09-24 21:40:18,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:18" (3/3) ... [2020-09-24 21:40:18,837 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label52.c [2020-09-24 21:40:18,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:18,865 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:18,889 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:18,926 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:18,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:18,926 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:18,927 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:18,927 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:18,927 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:18,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:18,927 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:40:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-24 21:40:18,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:18,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:18,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1583508727, now seen corresponding path program 1 times [2020-09-24 21:40:19,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:19,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:40:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:19,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:22,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:24,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:24,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:24,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 21:40:24,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:40:24,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5180 [2020-09-24 21:40:24,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:24,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:24,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:24,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:24,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:40:25,015 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-09-24 21:40:25,209 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-09-24 21:40:25,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:25,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:25,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:25,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:25,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-24 21:40:25,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:25,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:25,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:26,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:40:26,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:26,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:40:26,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79816039] [2020-09-24 21:40:26,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:40:26,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:26,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:40:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:40:26,090 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:40:26,744 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-09-24 21:40:27,020 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2020-09-24 21:40:27,364 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-09-24 21:40:27,897 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2020-09-24 21:40:28,970 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2020-09-24 21:40:29,558 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-09-24 21:40:30,385 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-09-24 21:40:30,996 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-09-24 21:40:32,003 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-09-24 21:40:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:34,747 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:40:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:40:34,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 154 [2020-09-24 21:40:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:34,790 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:40:34,790 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:40:34,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:40:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:40:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:40:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1147 transitions. [2020-09-24 21:40:34,929 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1147 transitions. Word has length 154 [2020-09-24 21:40:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:34,930 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1147 transitions. [2020-09-24 21:40:34,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:40:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1147 transitions. [2020-09-24 21:40:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-09-24 21:40:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:34,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:34,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:34,949 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1386970978, now seen corresponding path program 1 times [2020-09-24 21:40:34,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:34,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377675718] [2020-09-24 21:40:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:35,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:35,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:35,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:40,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-09-24 21:40:40,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:40:40,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-09-24 21:40:40,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:40,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:40:40,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-24 21:40:40,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-09-24 21:40:40,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:40:40,846 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-09-24 21:40:40,980 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-09-24 21:40:41,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:41,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:41,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:41,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:41,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:40:41,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:41,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:40:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:40:41,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:41,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:41,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:41,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 21:40:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 21:40:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:40:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:41,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:41,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:41,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:41,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-24 21:40:41,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:40:42,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377675718] [2020-09-24 21:40:42,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:42,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:40:42,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957658550] [2020-09-24 21:40:42,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:40:42,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:40:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:40:42,082 INFO L87 Difference]: Start difference. First operand 985 states and 1147 transitions. Second operand 18 states. [2020-09-24 21:40:44,619 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-24 21:40:45,225 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-09-24 21:40:45,533 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-09-24 21:40:45,777 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-09-24 21:40:46,036 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-09-24 21:40:46,809 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 113 [2020-09-24 21:40:47,535 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-09-24 21:40:47,907 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2020-09-24 21:40:48,644 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 107 [2020-09-24 21:40:49,133 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2020-09-24 21:40:50,056 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2020-09-24 21:40:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:50,839 INFO L93 Difference]: Finished difference Result 3182 states and 4004 transitions. [2020-09-24 21:40:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 21:40:50,840 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 192 [2020-09-24 21:40:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:50,857 INFO L225 Difference]: With dead ends: 3182 [2020-09-24 21:40:50,858 INFO L226 Difference]: Without dead ends: 2285 [2020-09-24 21:40:50,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=400, Invalid=1082, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 21:40:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-09-24 21:40:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1939. [2020-09-24 21:40:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1939 states. [2020-09-24 21:40:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2301 transitions. [2020-09-24 21:40:50,969 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2301 transitions. Word has length 192 [2020-09-24 21:40:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:50,970 INFO L479 AbstractCegarLoop]: Abstraction has 1939 states and 2301 transitions. [2020-09-24 21:40:50,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:40:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2301 transitions. [2020-09-24 21:40:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-24 21:40:50,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:50,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:50,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:50,983 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1075803564, now seen corresponding path program 1 times [2020-09-24 21:40:50,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:50,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327384115] [2020-09-24 21:40:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:51,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:51,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:55,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:56,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-24 21:40:56,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:40:56,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:40:56,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:56,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:40:56,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:56,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 21:40:56,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:56,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:56,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:56,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:40:56,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:56,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:40:56,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:56,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:56,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:56,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:56,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:56,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 21:40:56,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:56,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:56,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:56,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:56,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:56,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:40:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:56,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:56,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:40:56,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:56,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 21:40:56,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:56,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:56,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:56,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:40:56,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:40:56,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327384115] [2020-09-24 21:40:56,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:56,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:40:56,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148410034] [2020-09-24 21:40:56,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:40:56,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:56,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:40:56,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:40:56,540 INFO L87 Difference]: Start difference. First operand 1939 states and 2301 transitions. Second operand 10 states. [2020-09-24 21:40:58,168 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-09-24 21:41:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:00,061 INFO L93 Difference]: Finished difference Result 4314 states and 5200 transitions. [2020-09-24 21:41:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:41:00,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 197 [2020-09-24 21:41:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:00,077 INFO L225 Difference]: With dead ends: 4314 [2020-09-24 21:41:00,077 INFO L226 Difference]: Without dead ends: 2313 [2020-09-24 21:41:00,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:41:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2020-09-24 21:41:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2238. [2020-09-24 21:41:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2238 states. [2020-09-24 21:41:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 2668 transitions. [2020-09-24 21:41:00,183 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 2668 transitions. Word has length 197 [2020-09-24 21:41:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:00,185 INFO L479 AbstractCegarLoop]: Abstraction has 2238 states and 2668 transitions. [2020-09-24 21:41:00,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:41:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 2668 transitions. [2020-09-24 21:41:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 21:41:00,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:00,197 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:00,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:00,198 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:00,198 INFO L82 PathProgramCache]: Analyzing trace with hash -422908273, now seen corresponding path program 1 times [2020-09-24 21:41:00,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:00,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488837143] [2020-09-24 21:41:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:00,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:00,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:00,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking...