/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:26:38,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:26:38,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:26:38,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:26:38,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:26:38,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:26:38,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:26:38,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:26:38,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:26:38,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:26:38,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:26:38,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:26:38,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:26:38,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:26:38,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:26:38,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:26:38,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:26:38,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:26:38,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:26:38,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:26:38,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:26:38,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:26:38,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:26:38,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:26:38,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:26:38,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:26:38,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:26:38,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:26:38,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:26:38,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:26:38,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:26:38,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:26:38,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:26:38,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:26:38,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:26:38,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:26:38,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:26:38,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:26:38,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:26:38,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:26:38,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:26:38,536 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 [2020-09-21 12:26:38,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:26:38,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:26:38,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:26:38,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:26:38,589 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:26:38,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:26:38,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:26:38,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:26:38,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:26:38,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:26:38,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:26:38,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:26:38,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:26:38,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:26:38,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:26:38,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:26:38,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:26:38,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:26:38,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:26:38,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:26:38,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:26:38,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:26:38,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:26:38,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:26:38,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:26:38,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:26:38,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:26:38,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:26:38,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:26:38,594 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:26:39,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:26:39,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:26:39,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:26:39,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:26:39,099 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:26:39,101 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-21 12:26:39,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/daa7f5ece/9f878d2c67e44856bf9212fbd29304c1/FLAGb508a3d00 [2020-09-21 12:26:39,720 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:26:39,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-21 12:26:39,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/daa7f5ece/9f878d2c67e44856bf9212fbd29304c1/FLAGb508a3d00 [2020-09-21 12:26:40,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/daa7f5ece/9f878d2c67e44856bf9212fbd29304c1 [2020-09-21 12:26:40,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:26:40,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:26:40,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:26:40,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:26:40,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:26:40,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260ceee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40, skipping insertion in model container [2020-09-21 12:26:40,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:26:40,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:26:40,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:26:40,405 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:26:40,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:26:40,448 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:26:40,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40 WrapperNode [2020-09-21 12:26:40,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:26:40,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:26:40,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:26:40,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:26:40,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (1/1) ... [2020-09-21 12:26:40,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:26:40,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:26:40,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:26:40,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:26:40,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (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 [2020-09-21 12:26:40,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:26:40,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:26:40,666 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-21 12:26:40,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:26:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:26:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:26:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:26:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:26:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:26:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:26:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:26:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:26:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:26:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:26:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:26:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:26:40,976 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:26:40,977 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 12:26:40,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:26:40 BoogieIcfgContainer [2020-09-21 12:26:40,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:26:41,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:26:41,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:26:41,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:26:41,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:26:40" (1/3) ... [2020-09-21 12:26:41,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207a3323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:26:41, skipping insertion in model container [2020-09-21 12:26:41,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:26:40" (2/3) ... [2020-09-21 12:26:41,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207a3323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:26:41, skipping insertion in model container [2020-09-21 12:26:41,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:26:40" (3/3) ... [2020-09-21 12:26:41,024 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-21 12:26:41,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:26:41,048 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:26:41,074 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:26:41,102 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:26:41,103 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:26:41,103 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:26:41,103 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:26:41,103 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:26:41,103 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:26:41,103 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:26:41,103 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:26:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-21 12:26:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 12:26:41,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:41,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:41,132 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:41,140 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-09-21 12:26:41,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:41,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40560592] [2020-09-21 12:26:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:41,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:41,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:26:41,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:41,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-09-21 12:26:41,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:26:41,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:41,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:26:41,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:41,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:41,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:41,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:26:41,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:41,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:41,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:26:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:41,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:41,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:41,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:41,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:41,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:26:41,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:41,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:41,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:41,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:41,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:41,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40560592] [2020-09-21 12:26:41,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:41,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:26:41,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015984778] [2020-09-21 12:26:41,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:26:41,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:26:41,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:26:41,732 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-09-21 12:26:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:41,838 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-09-21 12:26:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:26:41,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 12:26:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:41,853 INFO L225 Difference]: With dead ends: 42 [2020-09-21 12:26:41,854 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 12:26:41,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:26:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 12:26:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-21 12:26:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 12:26:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-21 12:26:41,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-09-21 12:26:41,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:41,906 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-21 12:26:41,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:26:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-21 12:26:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 12:26:41,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:41,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:41,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:26:41,908 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:41,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-09-21 12:26:41,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:41,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77601859] [2020-09-21 12:26:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:41,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:41,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:42,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:42,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:26:42,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:42,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-09-21 12:26:42,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:42,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:26:42,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:42,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:26:42,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:42,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:42,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:42,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:42,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:42,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:42,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:42,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:42,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 12:26:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:42,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:42,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:42,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:42,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:42,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:42,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:42,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:42,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:42,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:42,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:42,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77601859] [2020-09-21 12:26:42,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:42,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:26:42,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43481324] [2020-09-21 12:26:42,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:26:42,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:26:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:26:42,560 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-09-21 12:26:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:42,647 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-21 12:26:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:26:42,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-09-21 12:26:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:42,649 INFO L225 Difference]: With dead ends: 34 [2020-09-21 12:26:42,650 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 12:26:42,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:26:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 12:26:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-21 12:26:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 12:26:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 12:26:42,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-09-21 12:26:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:42,669 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 12:26:42,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:26:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 12:26:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:26:42,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:42,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:42,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:26:42,672 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:42,673 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2020-09-21 12:26:42,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:42,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260197616] [2020-09-21 12:26:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:42,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:43,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:43,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:26:43,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:43,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-09-21 12:26:43,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:26:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:26:43,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:43,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:43,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:43,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:43,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:43,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:43,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:43,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:43,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 12:26:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:43,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:43,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:43,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:43,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:43,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:43,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:43,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260197616] [2020-09-21 12:26:43,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:43,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:26:43,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601722397] [2020-09-21 12:26:43,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:26:43,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:43,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:26:43,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:26:43,450 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-21 12:26:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:43,527 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-09-21 12:26:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:26:43,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 12:26:43,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:43,529 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:26:43,530 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 12:26:43,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:26:43,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 12:26:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-21 12:26:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 12:26:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-09-21 12:26:43,537 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-09-21 12:26:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:43,538 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-09-21 12:26:43,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:26:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-09-21 12:26:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:26:43,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:43,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:43,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:26:43,540 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2020-09-21 12:26:43,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:43,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823813108] [2020-09-21 12:26:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:43,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:43,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:44,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:44,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:26:44,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-09-21 12:26:44,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:26:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:26:44,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:44,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:44,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:44,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:44,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:44,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:44,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:44,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:44,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:44,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:44,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:44,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:44,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 12:26:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:44,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:44,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:44,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:44,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:44,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:44,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:44,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:44,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:44,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823813108] [2020-09-21 12:26:44,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:44,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:26:44,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357367911] [2020-09-21 12:26:44,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:26:44,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:26:44,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:26:44,447 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-09-21 12:26:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:44,535 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-21 12:26:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:26:44,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 12:26:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:44,538 INFO L225 Difference]: With dead ends: 38 [2020-09-21 12:26:44,538 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 12:26:44,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:26:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 12:26:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-21 12:26:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 12:26:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-21 12:26:44,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-09-21 12:26:44,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:44,546 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-21 12:26:44,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:26:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-21 12:26:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:26:44,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:44,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:44,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:26:44,548 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2113766385, now seen corresponding path program 3 times [2020-09-21 12:26:44,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:44,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420453147] [2020-09-21 12:26:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:45,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:45,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:26:45,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:45,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-21 12:26:45,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:26:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:26:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:26:45,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:45,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:45,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:45,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:45,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:45,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:45,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:45,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:45,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:45,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:45,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:45,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:45,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 12:26:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:45,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:45,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:45,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:45,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:45,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:45,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:45,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:45,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-21 12:26:45,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420453147] [2020-09-21 12:26:45,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:26:45,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:26:45,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549568142] [2020-09-21 12:26:45,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:26:45,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:45,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:26:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:26:45,692 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-09-21 12:26:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:45,803 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-09-21 12:26:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:26:45,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-21 12:26:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:45,805 INFO L225 Difference]: With dead ends: 35 [2020-09-21 12:26:45,805 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 12:26:45,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:26:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 12:26:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 12:26:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 12:26:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-21 12:26:45,812 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-09-21 12:26:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:45,813 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-21 12:26:45,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:26:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-21 12:26:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:26:45,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:45,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:45,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:26:45,815 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:45,815 INFO L82 PathProgramCache]: Analyzing trace with hash -50594516, now seen corresponding path program 1 times [2020-09-21 12:26:45,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:45,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115463703] [2020-09-21 12:26:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:45,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:46,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:46,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:46,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:26:46,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:26:46,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-21 12:26:46,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:46,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:26:46,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:46,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:46,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:46,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:46,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:46,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:46,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:46,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:46,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 12:26:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:46,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:46,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:46,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:46,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:46,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:46,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:26:46,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115463703] [2020-09-21 12:26:46,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:46,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:26:46,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425969537] [2020-09-21 12:26:46,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:26:46,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:46,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:26:46,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:26:46,932 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-09-21 12:26:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:47,024 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-21 12:26:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:26:47,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-21 12:26:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:47,026 INFO L225 Difference]: With dead ends: 44 [2020-09-21 12:26:47,026 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 12:26:47,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:26:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 12:26:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-21 12:26:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:26:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-09-21 12:26:47,041 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-09-21 12:26:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:47,042 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-09-21 12:26:47,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:26:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-09-21 12:26:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:26:47,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:47,044 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:47,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:26:47,044 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 619997966, now seen corresponding path program 2 times [2020-09-21 12:26:47,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:47,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800575011] [2020-09-21 12:26:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:47,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:48,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:48,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:26:48,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:26:48,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:26:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:26:48,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:48,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:48,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:48,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:48,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:48,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:48,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:48,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:48,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:48,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:48,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:48,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 12:26:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:48,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:48,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:48,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:48,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:48,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 12:26:48,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800575011] [2020-09-21 12:26:48,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:48,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:26:48,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810444857] [2020-09-21 12:26:48,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:26:48,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:48,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:26:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:26:48,258 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-09-21 12:26:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:48,440 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-09-21 12:26:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:26:48,442 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-21 12:26:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:48,443 INFO L225 Difference]: With dead ends: 39 [2020-09-21 12:26:48,443 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:26:48,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:26:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:26:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 12:26:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 12:26:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-21 12:26:48,450 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-09-21 12:26:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:48,450 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-21 12:26:48,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:26:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-21 12:26:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:26:48,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:48,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:48,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:26:48,452 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:48,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1042968311, now seen corresponding path program 3 times [2020-09-21 12:26:48,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:48,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081648924] [2020-09-21 12:26:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:48,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:48,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:49,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:49,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:26:49,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:49,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:26:49,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:49,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:26:49,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:49,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:49,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:49,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:49,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:49,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:49,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:49,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:49,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:49,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:49,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:49,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:26:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:49,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:49,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:49,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:49,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:49,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:49,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 12:26:49,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081648924] [2020-09-21 12:26:49,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:49,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:26:49,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252870488] [2020-09-21 12:26:49,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:26:49,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:49,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:26:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:26:49,580 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-09-21 12:26:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:49,664 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-09-21 12:26:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:26:49,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-21 12:26:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:49,666 INFO L225 Difference]: With dead ends: 50 [2020-09-21 12:26:49,666 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 12:26:49,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:26:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 12:26:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 12:26:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:26:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-21 12:26:49,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-09-21 12:26:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:49,673 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-21 12:26:49,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:26:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-21 12:26:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 12:26:49,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:49,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:49,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:26:49,674 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash 977288683, now seen corresponding path program 4 times [2020-09-21 12:26:49,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:49,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920007521] [2020-09-21 12:26:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:49,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:49,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:50,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:50,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 12:26:50,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:50,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-21 12:26:50,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:50,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:26:50,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:26:50,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:26:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:50,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:50,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:50,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:50,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:50,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:50,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:50,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:50,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:50,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:50,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:50,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 12:26:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:50,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:50,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:50,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:50,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:50,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:50,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:50,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:50,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 12:26:50,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920007521] [2020-09-21 12:26:50,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:50,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:26:50,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644311068] [2020-09-21 12:26:50,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:26:50,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:26:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:26:50,872 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-09-21 12:26:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:51,024 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-21 12:26:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:51,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-21 12:26:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:51,026 INFO L225 Difference]: With dead ends: 43 [2020-09-21 12:26:51,026 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 12:26:51,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:26:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 12:26:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-21 12:26:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:26:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-21 12:26:51,032 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-21 12:26:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:51,033 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-21 12:26:51,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:26:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-21 12:26:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 12:26:51,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:51,034 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:51,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:26:51,035 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:51,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1283972954, now seen corresponding path program 5 times [2020-09-21 12:26:51,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:51,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106602014] [2020-09-21 12:26:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:51,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:51,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:52,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:52,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 12:26:52,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:52,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-09-21 12:26:52,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:52,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:52,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:52,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:26:52,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:52,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:52,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:52,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:52,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:52,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:52,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:52,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:52,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:52,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:52,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:52,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:52,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:26:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:52,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:52,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:52,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:52,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:52,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:52,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:52,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 12:26:52,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106602014] [2020-09-21 12:26:52,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:52,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:26:52,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790573868] [2020-09-21 12:26:52,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:26:52,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:26:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:26:52,242 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 9 states. [2020-09-21 12:26:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:52,370 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-09-21 12:26:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:26:52,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-09-21 12:26:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:52,372 INFO L225 Difference]: With dead ends: 56 [2020-09-21 12:26:52,372 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 12:26:52,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:26:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 12:26:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-21 12:26:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:26:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-21 12:26:52,379 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-09-21 12:26:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:52,379 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-21 12:26:52,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:26:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-21 12:26:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 12:26:52,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:52,381 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:52,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:26:52,381 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1797098632, now seen corresponding path program 6 times [2020-09-21 12:26:52,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:52,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514065779] [2020-09-21 12:26:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:52,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:52,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:53,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:53,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 12:26:53,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:53,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:26:53,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:53,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:26:53,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:53,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:53,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:53,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:53,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:53,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:53,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:53,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:53,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:53,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:53,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 12:26:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:53,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:53,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:53,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:53,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:53,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:53,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:53,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:53,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-21 12:26:53,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514065779] [2020-09-21 12:26:53,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:53,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:26:53,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674401358] [2020-09-21 12:26:53,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:26:53,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:26:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:26:53,682 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-09-21 12:26:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:53,890 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-09-21 12:26:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:26:53,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-09-21 12:26:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:53,891 INFO L225 Difference]: With dead ends: 47 [2020-09-21 12:26:53,891 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 12:26:53,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:26:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 12:26:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-21 12:26:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 12:26:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-21 12:26:53,901 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-09-21 12:26:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:53,901 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-21 12:26:53,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:26:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-21 12:26:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 12:26:53,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:53,905 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:53,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:26:53,905 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 574372867, now seen corresponding path program 7 times [2020-09-21 12:26:53,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:53,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809219811] [2020-09-21 12:26:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:53,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:54,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:54,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:54,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 12:26:54,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:54,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-09-21 12:26:54,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:26:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:26:54,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:55,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:55,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:55,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:55,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:55,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:55,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:55,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:55,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:55,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 12:26:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:55,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:55,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:55,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:55,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:55,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:55,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:55,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-21 12:26:55,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809219811] [2020-09-21 12:26:55,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:55,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:26:55,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158775368] [2020-09-21 12:26:55,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:26:55,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:55,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:26:55,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:55,075 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2020-09-21 12:26:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:55,189 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-09-21 12:26:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:55,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-09-21 12:26:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:55,190 INFO L225 Difference]: With dead ends: 62 [2020-09-21 12:26:55,191 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:26:55,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:26:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-21 12:26:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 12:26:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-09-21 12:26:55,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-09-21 12:26:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:55,200 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-09-21 12:26:55,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:26:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-09-21 12:26:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 12:26:55,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:55,202 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:55,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:26:55,204 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1873077989, now seen corresponding path program 8 times [2020-09-21 12:26:55,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:55,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692139133] [2020-09-21 12:26:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:55,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:56,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:56,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 12:26:56,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:56,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-09-21 12:26:56,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:56,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:26:56,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-21 12:26:56,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:26:56,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:56,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:56,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:56,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:56,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:56,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:56,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:56,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:56,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:56,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:56,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:56,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:56,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 12:26:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:56,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:56,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:56,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:56,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:56,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:56,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:56,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:56,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:56,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:56,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-09-21 12:26:56,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692139133] [2020-09-21 12:26:56,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:56,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:26:56,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350218651] [2020-09-21 12:26:56,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:26:56,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:26:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:56,447 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-09-21 12:26:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:56,635 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-09-21 12:26:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 12:26:56,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-21 12:26:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:56,636 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:26:56,637 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 12:26:56,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 12:26:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-21 12:26:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 12:26:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-09-21 12:26:56,646 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-09-21 12:26:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:56,651 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-09-21 12:26:56,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:26:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-09-21 12:26:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 12:26:56,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:56,652 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:56,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:26:56,652 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:56,656 INFO L82 PathProgramCache]: Analyzing trace with hash 576090912, now seen corresponding path program 9 times [2020-09-21 12:26:56,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:56,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664826588] [2020-09-21 12:26:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:56,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:57,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:57,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 12:26:57,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:57,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:26:57,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:26:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-21 12:26:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:26:57,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:57,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:57,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:57,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:57,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:57,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:26:57,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:57,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:57,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:26:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:57,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:57,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:57,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:57,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:57,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:57,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-09-21 12:26:57,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664826588] [2020-09-21 12:26:57,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:57,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:26:57,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822705908] [2020-09-21 12:26:57,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:26:57,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:57,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:26:57,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:26:57,892 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 11 states. [2020-09-21 12:26:58,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:58,082 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-09-21 12:26:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 12:26:58,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-09-21 12:26:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:58,083 INFO L225 Difference]: With dead ends: 53 [2020-09-21 12:26:58,083 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 12:26:58,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-21 12:26:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 12:26:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-21 12:26:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 12:26:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-21 12:26:58,093 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-09-21 12:26:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:58,094 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-21 12:26:58,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:26:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-21 12:26:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 12:26:58,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:58,096 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:58,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:26:58,096 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash -287974245, now seen corresponding path program 10 times [2020-09-21 12:26:58,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:58,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087324830] [2020-09-21 12:26:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:59,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:59,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 12:26:59,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:59,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-09-21 12:26:59,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:26:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:26:59,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:59,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:59,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:59,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:59,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:59,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:59,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:26:59,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:59,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:59,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 12:26:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:59,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:59,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:59,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:59,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:26:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:59,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-09-21 12:26:59,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087324830] [2020-09-21 12:26:59,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:59,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:26:59,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617159565] [2020-09-21 12:26:59,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:26:59,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:26:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:26:59,302 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 11 states. [2020-09-21 12:26:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:59,395 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-09-21 12:26:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:26:59,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-21 12:26:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:59,396 INFO L225 Difference]: With dead ends: 72 [2020-09-21 12:26:59,396 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:26:59,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:26:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:26:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-21 12:26:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 12:26:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-09-21 12:26:59,406 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-09-21 12:26:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:59,407 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-09-21 12:26:59,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:26:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-09-21 12:26:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 12:26:59,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:59,408 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:59,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:26:59,410 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:59,410 INFO L82 PathProgramCache]: Analyzing trace with hash 618092029, now seen corresponding path program 11 times [2020-09-21 12:26:59,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:59,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287329474] [2020-09-21 12:26:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:59,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:00,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:00,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 12:27:00,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:00,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-09-21 12:27:00,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:00,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:27:00,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-21 12:27:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:27:00,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:00,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:00,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:00,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:00,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:00,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:00,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:00,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:00,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:00,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:00,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 12:27:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:00,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:00,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:00,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:00,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:00,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:00,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:00,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:27:00,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:00,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-21 12:27:00,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287329474] [2020-09-21 12:27:00,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:00,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:27:00,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307449577] [2020-09-21 12:27:00,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:27:00,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:00,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:27:00,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:27:00,672 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2020-09-21 12:27:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:00,871 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-09-21 12:27:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 12:27:00,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-09-21 12:27:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:00,872 INFO L225 Difference]: With dead ends: 57 [2020-09-21 12:27:00,873 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 12:27:00,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:27:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 12:27:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-21 12:27:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 12:27:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-09-21 12:27:00,883 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-09-21 12:27:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:00,883 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-09-21 12:27:00,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:27:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-09-21 12:27:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 12:27:00,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:00,887 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:00,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 12:27:00,888 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:00,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1420393528, now seen corresponding path program 12 times [2020-09-21 12:27:00,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:00,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974315905] [2020-09-21 12:27:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:00,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:01,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:01,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:01,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 12:27:01,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-09-21 12:27:01,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:01,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:27:01,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:01,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:27:01,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:02,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:02,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:02,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:02,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:02,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:02,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:27:02,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:02,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:02,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:02,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:02,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:02,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 12:27:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:02,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:02,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:02,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:02,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:02,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:02,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:02,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:27:02,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:02,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-09-21 12:27:02,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974315905] [2020-09-21 12:27:02,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:02,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:27:02,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104777556] [2020-09-21 12:27:02,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:27:02,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:27:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:27:02,097 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 12 states. [2020-09-21 12:27:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:02,179 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-09-21 12:27:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:27:02,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-09-21 12:27:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:02,180 INFO L225 Difference]: With dead ends: 78 [2020-09-21 12:27:02,180 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 12:27:02,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:27:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 12:27:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-21 12:27:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 12:27:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-21 12:27:02,185 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-09-21 12:27:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:02,186 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-21 12:27:02,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:27:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-21 12:27:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 12:27:02,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:02,187 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:02,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 12:27:02,187 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1353413786, now seen corresponding path program 13 times [2020-09-21 12:27:02,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:02,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783811182] [2020-09-21 12:27:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:03,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:03,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 12:27:03,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:03,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:27:03,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:03,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:27:03,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-21 12:27:03,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 12:27:03,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:03,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:03,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:03,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:03,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:27:03,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:03,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:03,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:03,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 12:27:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:03,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:03,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:03,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:03,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:03,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:27:03,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:03,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:27:03,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-09-21 12:27:03,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783811182] [2020-09-21 12:27:03,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:03,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:27:03,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367649486] [2020-09-21 12:27:03,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:27:03,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:03,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:27:03,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:27:03,404 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 10 states. [2020-09-21 12:27:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:03,661 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-09-21 12:27:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:03,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-09-21 12:27:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:03,662 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:27:03,662 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:27:03,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:27:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:27:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:27:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:27:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:27:03,664 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-09-21 12:27:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:03,664 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:27:03,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:27:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:27:03,665 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:27:03,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 12:27:03,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:27:03,808 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:27:03,808 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:27:03,809 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:27:03,809 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:27:03,809 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:27:03,809 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:27:03,809 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:27:03,809 INFO L264 CegarLoopResult]: At program point L37-4(lines 37 39) the Hoare annotation is: (let ((.cse0 (select (select |#memory_$Pointer$.base| |main_~#cont~0.base|) |main_~#cont~0.offset|)) (.cse1 (+ (select (select |#memory_$Pointer$.offset| |main_~#cont~0.base|) |main_~#cont~0.offset|) 4))) (and (= main_~i~0 (select (select |#memory_int| .cse0) .cse1)) (= .cse0 main_~pa~0.base) (= .cse1 main_~pa~0.offset))) [2020-09-21 12:27:03,810 INFO L268 CegarLoopResult]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2020-09-21 12:27:03,810 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 50) no Hoare annotation was computed. [2020-09-21 12:27:03,810 INFO L271 CegarLoopResult]: At program point L27-3(lines 27 30) the Hoare annotation is: true [2020-09-21 12:27:03,810 INFO L268 CegarLoopResult]: For program point L27-4(lines 21 50) no Hoare annotation was computed. [2020-09-21 12:27:03,810 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 50) no Hoare annotation was computed. [2020-09-21 12:27:03,810 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-09-21 12:27:03,810 INFO L268 CegarLoopResult]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2020-09-21 12:27:03,810 INFO L268 CegarLoopResult]: For program point L32(lines 32 44) no Hoare annotation was computed. [2020-09-21 12:27:03,811 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2020-09-21 12:27:03,811 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 20 50) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 12:27:03,811 INFO L264 CegarLoopResult]: At program point L41(lines 21 50) the Hoare annotation is: false [2020-09-21 12:27:03,811 INFO L268 CegarLoopResult]: For program point L37-1(lines 37 39) no Hoare annotation was computed. [2020-09-21 12:27:03,811 INFO L268 CegarLoopResult]: For program point L35(lines 35 43) no Hoare annotation was computed. [2020-09-21 12:27:03,811 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 39) the Hoare annotation is: (and (= (select (select |#memory_$Pointer$.base| |main_~#cont~0.base|) |main_~#cont~0.offset|) main_~pa~0.base) (= (+ (select (select |#memory_$Pointer$.offset| |main_~#cont~0.base|) |main_~#cont~0.offset|) 4) main_~pa~0.offset) (let ((.cse0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) (or (<= (+ main_~i~0 1) .cse0) (= main_~i~0 .cse0)))) [2020-09-21 12:27:03,812 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 15 18) the Hoare annotation is: true [2020-09-21 12:27:03,814 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 15 18) no Hoare annotation was computed. [2020-09-21 12:27:03,814 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 15 18) no Hoare annotation was computed. [2020-09-21 12:27:03,849 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:27:03,851 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:27:03,859 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,859 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,860 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 12:27:03,860 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 12:27:03,863 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:27:03,864 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:27:03,865 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,865 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,865 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 12:27:03,866 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 12:27:03,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:27:03 BoogieIcfgContainer [2020-09-21 12:27:03,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:27:03,879 INFO L168 Benchmark]: Toolchain (without parser) took 23784.05 ms. Allocated memory was 140.0 MB in the beginning and 404.2 MB in the end (delta: 264.2 MB). Free memory was 102.5 MB in the beginning and 113.7 MB in the end (delta: -11.2 MB). Peak memory consumption was 253.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:03,883 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:27:03,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.74 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 91.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:03,890 INFO L168 Benchmark]: Boogie Preprocessor took 131.90 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 180.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:03,891 INFO L168 Benchmark]: RCFGBuilder took 402.44 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 162.4 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:03,891 INFO L168 Benchmark]: TraceAbstraction took 22875.47 ms. Allocated memory was 202.9 MB in the beginning and 404.2 MB in the end (delta: 201.3 MB). Free memory was 162.4 MB in the beginning and 113.7 MB in the end (delta: 48.7 MB). Peak memory consumption was 250.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:03,897 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.74 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 91.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.90 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 180.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.44 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 162.4 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22875.47 ms. Allocated memory was 202.9 MB in the beginning and 404.2 MB in the end (delta: 201.3 MB). Free memory was 162.4 MB in the beginning and 113.7 MB in the end (delta: 48.7 MB). Peak memory consumption was 250.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant [2020-09-21 12:27:03,909 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:27:03,909 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:27:03,910 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,910 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,910 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 12:27:03,910 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 12:27:03,911 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:27:03,911 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:27:03,911 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,911 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:27:03,912 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 12:27:03,912 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (#memory_$Pointer$[cont][cont] == pa && #memory_$Pointer$[cont][cont] + 4 == pa) && (i + 1 <= unknown-#memory_int-unknown[pa][pa] || i == unknown-#memory_int-unknown[pa][pa]) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.5s, OverallIterations: 18, TraceHistogramMax: 9, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 303 SDtfs, 114 SDslu, 890 SDs, 0 SdLazy, 928 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 26 PreInvPairs, 44 NumberOfFragments, 86 HoareAnnotationTreeSize, 26 FomulaSimplifications, 258 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 52 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 595 NumberOfCodeBlocks, 595 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 577 ConstructedInterpolants, 0 QuantifiedInterpolants, 69481 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 509/839 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...