/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:31:30,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:31:30,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:31:30,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:31:30,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:31:30,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:31:30,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:31:30,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:31:30,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:31:30,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:31:30,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:31:30,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:31:30,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:31:30,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:31:30,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:31:30,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:31:30,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:31:30,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:31:30,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:31:30,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:31:30,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:31:30,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:31:30,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:31:30,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:31:30,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:31:30,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:31:30,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:31:30,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:31:30,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:31:30,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:31:30,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:31:30,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:31:30,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:31:30,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:31:30,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:31:30,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:31:30,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:31:30,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:31:30,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:31:30,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:31:30,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:31:30,535 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 [2020-09-25 12:31:30,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:31:30,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:31:30,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:31:30,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:31:30,571 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:31:30,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:31:30,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:31:30,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:31:30,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:31:30,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:31:30,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:31:30,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:31:30,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:31:30,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:31:30,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:31:30,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:31:30,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:31:30,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:31:30,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:31:30,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:31:30,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:31:30,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:30,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:31:30,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:31:30,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:31:30,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:31:30,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:31:30,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:31:30,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:31:30,576 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:31:31,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:31:31,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:31:31,170 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:31:31,172 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:31:31,173 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:31:31,174 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-2.i [2020-09-25 12:31:31,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89ecdcae0/8f0a456a92bd48e084e3fe49496937ec/FLAGc862a1177 [2020-09-25 12:31:31,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:31:31,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum03-2.i [2020-09-25 12:31:31,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89ecdcae0/8f0a456a92bd48e084e3fe49496937ec/FLAGc862a1177 [2020-09-25 12:31:32,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89ecdcae0/8f0a456a92bd48e084e3fe49496937ec [2020-09-25 12:31:32,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:31:32,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:31:32,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:32,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:31:32,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:31:32,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32, skipping insertion in model container [2020-09-25 12:31:32,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:31:32,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:31:32,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:32,475 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:31:32,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:32,505 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:31:32,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32 WrapperNode [2020-09-25 12:31:32,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:32,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:31:32,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:31:32,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:31:32,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:31:32,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:31:32,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:31:32,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:31:32,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (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 [2020-09-25 12:31:32,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:31:32,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:31:32,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:31:32,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:31:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:31:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:31:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 12:31:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:31:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:31:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:31:32,894 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:31:32,895 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:31:32,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:32 BoogieIcfgContainer [2020-09-25 12:31:32,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:31:32,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:31:32,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:31:32,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:31:32,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:31:32" (1/3) ... [2020-09-25 12:31:32,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1afc39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:32, skipping insertion in model container [2020-09-25 12:31:32,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (2/3) ... [2020-09-25 12:31:32,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1afc39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:32, skipping insertion in model container [2020-09-25 12:31:32,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:32" (3/3) ... [2020-09-25 12:31:32,947 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-2.i [2020-09-25 12:31:32,976 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:31:33,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:31:33,041 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:31:33,070 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:31:33,070 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:31:33,071 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:31:33,071 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:31:33,071 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:31:33,071 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:31:33,071 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:31:33,071 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:31:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 12:31:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 12:31:33,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:33,099 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1015763017, now seen corresponding path program 1 times [2020-09-25 12:31:33,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542207423] [2020-09-25 12:31:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 12:31:33,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-25 12:31:33,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:31:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 12:31:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 12:31:33,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 12:31:33,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:33,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:31:33,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:33,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542207423] [2020-09-25 12:31:33,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:33,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 12:31:33,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637463202] [2020-09-25 12:31:33,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:31:33,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:31:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:31:33,973 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 9 states. [2020-09-25 12:31:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,174 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-09-25 12:31:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:31:34,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-09-25 12:31:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,189 INFO L225 Difference]: With dead ends: 50 [2020-09-25 12:31:34,190 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 12:31:34,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:31:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 12:31:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 12:31:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 12:31:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 12:31:34,252 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2020-09-25 12:31:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,252 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 12:31:34,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:31:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 12:31:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 12:31:34,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:34,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:31:34,255 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1391461948, now seen corresponding path program 1 times [2020-09-25 12:31:34,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343609464] [2020-09-25 12:31:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 12:31:35,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:35,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-09-25 12:31:35,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 12:31:35,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 12:31:35,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 12:31:35,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:31:35,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:35,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:35,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:35,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:35,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 12:31:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:31:35,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 12:31:35,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:31:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:31:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:35,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343609464] [2020-09-25 12:31:35,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:35,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 12:31:35,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140956380] [2020-09-25 12:31:35,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 12:31:35,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:35,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 12:31:35,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:31:35,794 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2020-09-25 12:31:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:36,086 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 12:31:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 12:31:36,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-09-25 12:31:36,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:36,089 INFO L225 Difference]: With dead ends: 46 [2020-09-25 12:31:36,089 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 12:31:36,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:31:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 12:31:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 12:31:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 12:31:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 12:31:36,101 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 29 [2020-09-25 12:31:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:36,101 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 12:31:36,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 12:31:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 12:31:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 12:31:36,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:36,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:36,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:31:36,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -864598657, now seen corresponding path program 2 times [2020-09-25 12:31:36,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:36,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600097999] [2020-09-25 12:31:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:41,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:41,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 12:31:41,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:31:41,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 12:31:41,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:41,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:41,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 12:31:41,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 12:31:41,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 12:31:41,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:41,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:41,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:41,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:41,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:41,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:41,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:41,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:41,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:41,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:41,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:41,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:31:41,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 12:31:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:41,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:41,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:31:41,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 12:31:41,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:41,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:31:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:31:41,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:41,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 12:31:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:41,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:41,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:41,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:31:41,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 12:31:41,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:41,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:41,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:31:41,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:41,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 12:31:41,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 12:31:41,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600097999] [2020-09-25 12:31:41,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:41,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:31:41,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656583975] [2020-09-25 12:31:41,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:31:41,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:41,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:31:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:31:41,909 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 13 states. [2020-09-25 12:31:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:42,437 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-25 12:31:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 12:31:42,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-09-25 12:31:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:42,443 INFO L225 Difference]: With dead ends: 56 [2020-09-25 12:31:42,443 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 12:31:42,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:31:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 12:31:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-09-25 12:31:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 12:31:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 12:31:42,470 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 39 [2020-09-25 12:31:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:42,471 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 12:31:42,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:31:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 12:31:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 12:31:42,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:42,481 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:42,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:31:42,483 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash -628399238, now seen corresponding path program 3 times [2020-09-25 12:31:42,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:42,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674499794] [2020-09-25 12:31:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:42,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:43,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:44,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:47,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:47,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 12:31:47,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 12:31:47,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 12:31:47,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:47,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 12:31:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 12:31:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 12:31:47,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:48,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:48,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:48,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:48,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:48,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:48,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:48,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:48,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:48,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:48,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:48,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:48,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 12:31:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:48,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:48,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:48,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:31:48,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:48,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 12:31:48,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:48,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:31:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:31:48,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:48,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 12:31:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:48,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:48,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:48,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:31:48,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:48,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 12:31:48,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:48,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:31:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 12:31:48,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:48,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 12:31:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:48,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:48,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:31:48,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:48,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 12:31:48,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:48,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:31:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:31:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 12:31:48,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674499794] [2020-09-25 12:31:48,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:48,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 12:31:48,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281118268] [2020-09-25 12:31:48,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 12:31:48,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:48,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 12:31:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:31:48,359 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 15 states. [2020-09-25 12:31:50,936 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-09-25 12:31:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:51,132 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-09-25 12:31:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 12:31:51,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-09-25 12:31:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:51,138 INFO L225 Difference]: With dead ends: 62 [2020-09-25 12:31:51,138 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 12:31:51,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-25 12:31:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 12:31:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-25 12:31:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 12:31:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 12:31:51,153 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 49 [2020-09-25 12:31:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:51,154 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 12:31:51,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 12:31:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 12:31:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 12:31:51,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:51,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:51,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:31:51,158 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1142588341, now seen corresponding path program 4 times [2020-09-25 12:31:51,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:51,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884369135] [2020-09-25 12:31:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:51,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:52,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:55,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:56,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:56,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 12:31:56,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:31:56,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5596 [2020-09-25 12:31:56,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:56,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:56,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 12:31:56,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 12:31:56,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 12:31:56,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:59,611 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-09-25 12:32:01,950 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-09-25 12:32:03,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:32:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:03,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:03,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:32:03,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:03,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:32:03,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:03,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:03,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:32:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:32:03,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:03,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 12:32:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:03,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:03,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:03,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:03,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:03,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 12:32:03,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:03,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:32:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 12:32:03,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:03,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 12:32:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:03,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:03,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:03,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:03,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 12:32:03,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:03,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:32:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:32:03,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:03,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 12:32:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:03,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:03,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:03,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:03,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:03,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 12:32:03,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:03,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:03,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:32:03,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:03,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:32:03,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:32:03,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 12:32:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:03,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:03,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:32:03,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:32:03,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:32:03,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-25 12:32:03,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:32:03,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:32:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:32:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:32:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 12:32:03,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:32:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 67 refuted. 1 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 12:32:03,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884369135] [2020-09-25 12:32:03,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:32:03,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 12:32:03,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943867774] [2020-09-25 12:32:03,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 12:32:03,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:32:03,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 12:32:03,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=268, Unknown=1, NotChecked=0, Total=306 [2020-09-25 12:32:03,950 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 18 states. [2020-09-25 12:32:11,513 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 60 DAG size of output: 23 [2020-09-25 12:32:11,928 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-09-25 12:32:12,544 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-09-25 12:32:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:32:23,712 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-09-25 12:32:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 12:32:23,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-09-25 12:32:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:32:23,715 INFO L225 Difference]: With dead ends: 72 [2020-09-25 12:32:23,715 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 12:32:23,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=133, Invalid=1125, Unknown=2, NotChecked=0, Total=1260 [2020-09-25 12:32:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 12:32:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-09-25 12:32:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 12:32:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-09-25 12:32:23,728 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 59 [2020-09-25 12:32:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:32:23,728 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-09-25 12:32:23,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 12:32:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-09-25 12:32:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 12:32:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:32:23,730 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:32:23,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:32:23,730 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:32:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:32:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 771151408, now seen corresponding path program 5 times [2020-09-25 12:32:23,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:32:23,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611391610] [2020-09-25 12:32:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:32:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:32:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:23,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:24,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:25,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:26,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:32:26,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking...