/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/eca-rers2012/Problem10_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:31:01,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:31:01,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:31:01,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:31:01,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:31:01,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:31:01,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:31:01,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:31:01,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:31:01,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:31:01,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:31:01,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:31:01,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:31:01,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:31:01,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:31:01,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:31:01,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:31:01,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:31:01,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:31:01,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:31:01,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:31:01,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:31:01,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:31:01,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:31:01,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:31:01,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:31:01,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:31:01,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:31:01,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:31:01,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:31:01,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:31:01,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:31:01,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:31:01,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:31:01,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:31:01,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:31:01,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:31:01,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:31:01,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:31:01,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:31:01,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:31:01,572 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 12:31:01,596 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:31:01,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:31:01,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:31:01,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:31:01,598 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:31:01,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:31:01,598 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:31:01,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:31:01,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:31:01,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:31:01,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:31:01,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:31:01,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:31:01,600 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:31:01,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:31:01,600 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:31:01,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:31:01,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:31:01,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:31:01,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:31:01,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:31:01,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:31:01,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:31:01,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:31:01,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:31:01,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:31:01,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:31:01,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:31:01,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:31:01,603 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 12:31:02,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:31:02,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:31:02,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:31:02,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:31:02,118 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:31:02,119 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label08.c [2020-09-21 12:31:02,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afee97579/b8fb0399c7dc40c5aecfb96336045c7b/FLAGd26af4f3f [2020-09-21 12:31:02,830 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:31:02,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label08.c [2020-09-21 12:31:02,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afee97579/b8fb0399c7dc40c5aecfb96336045c7b/FLAGd26af4f3f [2020-09-21 12:31:03,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afee97579/b8fb0399c7dc40c5aecfb96336045c7b [2020-09-21 12:31:03,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:31:03,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:31:03,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:31:03,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:31:03,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:31:03,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:03,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42dfe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03, skipping insertion in model container [2020-09-21 12:31:03,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:03,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:31:03,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:31:03,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:31:03,700 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:31:03,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:31:03,982 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:31:03,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03 WrapperNode [2020-09-21 12:31:03,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:31:03,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:31:03,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:31:03,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:31:04,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:04,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:04,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:04,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:04,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:04,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:04,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (1/1) ... [2020-09-21 12:31:04,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:31:04,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:31:04,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:31:04,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:31:04,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (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 12:31:04,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:31:04,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:31:04,224 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-21 12:31:04,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:31:04,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-21 12:31:04,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:31:04,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:31:04,225 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:31:04,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:31:04,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:31:04,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:31:05,554 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:31:05,554 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:31:05,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:31:05 BoogieIcfgContainer [2020-09-21 12:31:05,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:31:05,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:31:05,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:31:05,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:31:05,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:31:03" (1/3) ... [2020-09-21 12:31:05,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dd96e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:31:05, skipping insertion in model container [2020-09-21 12:31:05,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:31:03" (2/3) ... [2020-09-21 12:31:05,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66dd96e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:31:05, skipping insertion in model container [2020-09-21 12:31:05,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:31:05" (3/3) ... [2020-09-21 12:31:05,580 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label08.c [2020-09-21 12:31:05,595 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:31:05,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:31:05,636 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:31:05,686 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:31:05,687 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:31:05,687 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:31:05,687 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:31:05,688 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:31:05,688 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:31:05,688 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:31:05,688 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:31:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-09-21 12:31:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 12:31:05,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:05,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:05,744 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -464539961, now seen corresponding path program 1 times [2020-09-21 12:31:05,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:05,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258598473] [2020-09-21 12:31:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:06,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 12:31:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-09-21 12:31:06,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:31:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:31:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 12:31:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:31:06,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:06,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:06,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:06,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:06,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:31:06,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:06,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:06,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:06,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:31:06,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:06,755 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 12:31:06,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258598473] [2020-09-21 12:31:06,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:31:06,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:31:06,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825375847] [2020-09-21 12:31:06,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:31:06,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:31:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:31:06,800 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2020-09-21 12:31:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:08,416 INFO L93 Difference]: Finished difference Result 581 states and 1007 transitions. [2020-09-21 12:31:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:31:08,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-21 12:31:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:08,457 INFO L225 Difference]: With dead ends: 581 [2020-09-21 12:31:08,458 INFO L226 Difference]: Without dead ends: 302 [2020-09-21 12:31:08,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:31:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-09-21 12:31:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2020-09-21 12:31:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-09-21 12:31:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 423 transitions. [2020-09-21 12:31:08,552 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 423 transitions. Word has length 46 [2020-09-21 12:31:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:08,553 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 423 transitions. [2020-09-21 12:31:08,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:31:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 423 transitions. [2020-09-21 12:31:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-21 12:31:08,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:08,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:08,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:31:08,561 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2141486182, now seen corresponding path program 1 times [2020-09-21 12:31:08,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:08,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136865949] [2020-09-21 12:31:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:08,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:08,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:09,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:09,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-21 12:31:09,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:31:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:31:09,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:09,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-09-21 12:31:09,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:31:09,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:31:09,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:09,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:09,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:09,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:09,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:09,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:31:09,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:09,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:09,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:09,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:09,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:09,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:09,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:09,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:09,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 12:31:09,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 12:31:09,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:09,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-21 12:31:09,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:31:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:31:09,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136865949] [2020-09-21 12:31:09,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:09,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:31:09,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509294837] [2020-09-21 12:31:09,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:31:09,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:09,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:31:09,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:31:09,925 INFO L87 Difference]: Start difference. First operand 296 states and 423 transitions. Second operand 5 states. [2020-09-21 12:31:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:11,281 INFO L93 Difference]: Finished difference Result 886 states and 1296 transitions. [2020-09-21 12:31:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:31:11,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-09-21 12:31:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:11,294 INFO L225 Difference]: With dead ends: 886 [2020-09-21 12:31:11,294 INFO L226 Difference]: Without dead ends: 596 [2020-09-21 12:31:11,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:31:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-09-21 12:31:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 588. [2020-09-21 12:31:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-09-21 12:31:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 779 transitions. [2020-09-21 12:31:11,355 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 779 transitions. Word has length 118 [2020-09-21 12:31:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:11,356 INFO L479 AbstractCegarLoop]: Abstraction has 588 states and 779 transitions. [2020-09-21 12:31:11,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:31:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 779 transitions. [2020-09-21 12:31:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-21 12:31:11,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:11,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:11,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:31:11,364 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 437526305, now seen corresponding path program 1 times [2020-09-21 12:31:11,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:11,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349111894] [2020-09-21 12:31:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:11,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:12,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:12,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-21 12:31:12,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:31:12,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:31:12,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-09-21 12:31:12,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:31:12,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:12,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:12,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:12,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:12,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:12,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:31:12,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:12,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:12,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:12,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:12,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:12,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:12,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:12,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-21 12:31:12,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:12,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-21 12:31:12,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:12,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:12,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:12,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-21 12:31:12,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:31:12,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349111894] [2020-09-21 12:31:12,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:12,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:31:12,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253705029] [2020-09-21 12:31:12,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:31:12,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:12,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:31:12,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:31:12,788 INFO L87 Difference]: Start difference. First operand 588 states and 779 transitions. Second operand 5 states. [2020-09-21 12:31:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:14,194 INFO L93 Difference]: Finished difference Result 1464 states and 2012 transitions. [2020-09-21 12:31:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:31:14,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-09-21 12:31:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:14,206 INFO L225 Difference]: With dead ends: 1464 [2020-09-21 12:31:14,207 INFO L226 Difference]: Without dead ends: 882 [2020-09-21 12:31:14,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:31:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-09-21 12:31:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 878. [2020-09-21 12:31:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-09-21 12:31:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1114 transitions. [2020-09-21 12:31:14,252 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1114 transitions. Word has length 127 [2020-09-21 12:31:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:14,253 INFO L479 AbstractCegarLoop]: Abstraction has 878 states and 1114 transitions. [2020-09-21 12:31:14,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:31:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1114 transitions. [2020-09-21 12:31:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-21 12:31:14,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:14,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:14,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:31:14,268 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2014705075, now seen corresponding path program 1 times [2020-09-21 12:31:14,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:14,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706587933] [2020-09-21 12:31:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:14,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:15,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:15,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-09-21 12:31:15,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:15,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-21 12:31:15,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:15,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:15,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-21 12:31:15,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:31:15,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-21 12:31:15,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:15,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:15,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:15,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:15,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:15,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:31:15,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:15,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:15,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:15,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:15,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:15,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:15,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:15,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:15,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-21 12:31:15,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:15,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 12:31:15,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:15,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 12:31:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:15,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:15,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:15,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 12:31:15,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-21 12:31:15,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-21 12:31:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-21 12:31:15,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706587933] [2020-09-21 12:31:15,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:15,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:31:15,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613315270] [2020-09-21 12:31:15,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:31:15,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:15,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:31:15,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:31:15,842 INFO L87 Difference]: Start difference. First operand 878 states and 1114 transitions. Second operand 5 states. [2020-09-21 12:31:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:16,800 INFO L93 Difference]: Finished difference Result 1763 states and 2252 transitions. [2020-09-21 12:31:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:31:16,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2020-09-21 12:31:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:16,809 INFO L225 Difference]: With dead ends: 1763 [2020-09-21 12:31:16,809 INFO L226 Difference]: Without dead ends: 882 [2020-09-21 12:31:16,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:31:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-09-21 12:31:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 878. [2020-09-21 12:31:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-09-21 12:31:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1110 transitions. [2020-09-21 12:31:16,852 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1110 transitions. Word has length 198 [2020-09-21 12:31:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:16,855 INFO L479 AbstractCegarLoop]: Abstraction has 878 states and 1110 transitions. [2020-09-21 12:31:16,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:31:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1110 transitions. [2020-09-21 12:31:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-21 12:31:16,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:16,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:16,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:31:16,860 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:16,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2075663579, now seen corresponding path program 1 times [2020-09-21 12:31:16,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:16,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635946901] [2020-09-21 12:31:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:17,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:17,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:17,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:17,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:17,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-09-21 12:31:17,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:17,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-21 12:31:17,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:17,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:17,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-09-21 12:31:17,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 12:31:17,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:18,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:18,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:18,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:18,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:18,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:18,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:31:18,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:18,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:18,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:18,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:18,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:18,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:31:18,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 12:31:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-21 12:31:18,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:18,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 12:31:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:18,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:18,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:18,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-21 12:31:18,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:18,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-09-21 12:31:18,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:31:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-21 12:31:18,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:31:18,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635946901] [2020-09-21 12:31:18,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:18,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:31:18,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492462264] [2020-09-21 12:31:18,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:31:18,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:18,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:31:18,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:31:18,495 INFO L87 Difference]: Start difference. First operand 878 states and 1110 transitions. Second operand 7 states. [2020-09-21 12:31:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:20,293 INFO L93 Difference]: Finished difference Result 2072 states and 2713 transitions. [2020-09-21 12:31:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:31:20,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 206 [2020-09-21 12:31:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:20,301 INFO L225 Difference]: With dead ends: 2072 [2020-09-21 12:31:20,302 INFO L226 Difference]: Without dead ends: 1200 [2020-09-21 12:31:20,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:31:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2020-09-21 12:31:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1190. [2020-09-21 12:31:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-09-21 12:31:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1463 transitions. [2020-09-21 12:31:20,339 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1463 transitions. Word has length 206 [2020-09-21 12:31:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:20,340 INFO L479 AbstractCegarLoop]: Abstraction has 1190 states and 1463 transitions. [2020-09-21 12:31:20,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:31:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1463 transitions. [2020-09-21 12:31:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-09-21 12:31:20,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:20,344 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:20,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:31:20,344 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1122278204, now seen corresponding path program 1 times [2020-09-21 12:31:20,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:20,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244118997] [2020-09-21 12:31:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:20,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:20,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:21,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:21,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:21,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-09-21 12:31:21,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:21,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-21 12:31:21,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-21 12:31:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 12:31:21,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:21,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:21,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:21,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:21,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:21,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:31:21,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:21,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:21,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:21,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:21,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:21,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:21,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-21 12:31:21,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:21,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-21 12:31:21,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:21,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:21,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:21,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 12:31:21,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:21,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 12:31:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:21,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:21,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:21,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-21 12:31:21,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:21,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-21 12:31:21,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:21,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:21,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:31:21,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-21 12:31:21,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:31:21,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244118997] [2020-09-21 12:31:21,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:21,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:31:21,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695871647] [2020-09-21 12:31:21,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:31:21,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:21,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:31:21,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:31:21,875 INFO L87 Difference]: Start difference. First operand 1190 states and 1463 transitions. Second operand 7 states. [2020-09-21 12:31:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:23,657 INFO L93 Difference]: Finished difference Result 2690 states and 3443 transitions. [2020-09-21 12:31:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:31:23,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 213 [2020-09-21 12:31:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:23,666 INFO L225 Difference]: With dead ends: 2690 [2020-09-21 12:31:23,666 INFO L226 Difference]: Without dead ends: 1506 [2020-09-21 12:31:23,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:31:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2020-09-21 12:31:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1494. [2020-09-21 12:31:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-09-21 12:31:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1920 transitions. [2020-09-21 12:31:23,713 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1920 transitions. Word has length 213 [2020-09-21 12:31:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:23,714 INFO L479 AbstractCegarLoop]: Abstraction has 1494 states and 1920 transitions. [2020-09-21 12:31:23,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:31:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1920 transitions. [2020-09-21 12:31:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-09-21 12:31:23,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:23,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:23,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:31:23,719 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:23,720 INFO L82 PathProgramCache]: Analyzing trace with hash -931508684, now seen corresponding path program 1 times [2020-09-21 12:31:23,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:23,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728346238] [2020-09-21 12:31:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:24,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:24,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-09-21 12:31:24,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:24,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-21 12:31:24,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-09-21 12:31:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:31:24,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:24,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:24,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:24,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:24,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:24,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:24,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:31:24,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:24,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:24,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:24,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:24,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:24,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:24,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:24,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:24,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-21 12:31:24,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 12:31:24,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:24,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:25,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 12:31:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:25,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:25,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:25,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-21 12:31:25,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:25,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-21 12:31:25,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:25,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 12:31:25,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-21 12:31:25,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728346238] [2020-09-21 12:31:25,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:25,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:31:25,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621451765] [2020-09-21 12:31:25,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:31:25,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:31:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:31:25,288 INFO L87 Difference]: Start difference. First operand 1494 states and 1920 transitions. Second operand 5 states. [2020-09-21 12:31:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:26,279 INFO L93 Difference]: Finished difference Result 3005 states and 3873 transitions. [2020-09-21 12:31:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:31:26,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2020-09-21 12:31:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:26,292 INFO L225 Difference]: With dead ends: 3005 [2020-09-21 12:31:26,292 INFO L226 Difference]: Without dead ends: 1500 [2020-09-21 12:31:26,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:31:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2020-09-21 12:31:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1494. [2020-09-21 12:31:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-09-21 12:31:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1916 transitions. [2020-09-21 12:31:26,360 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1916 transitions. Word has length 221 [2020-09-21 12:31:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:26,361 INFO L479 AbstractCegarLoop]: Abstraction has 1494 states and 1916 transitions. [2020-09-21 12:31:26,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:31:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1916 transitions. [2020-09-21 12:31:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-09-21 12:31:26,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:26,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:26,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:31:26,370 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:26,370 INFO L82 PathProgramCache]: Analyzing trace with hash 735790032, now seen corresponding path program 1 times [2020-09-21 12:31:26,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:26,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009564300] [2020-09-21 12:31:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:26,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:26,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:27,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:27,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:27,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-09-21 12:31:27,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:27,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-09-21 12:31:27,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-09-21 12:31:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 12:31:27,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:27,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:27,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:27,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:27,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:27,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:31:27,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:27,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:27,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:27,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:27,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:27,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:27,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:27,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-21 12:31:27,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:27,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-21 12:31:27,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:27,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:27,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:27,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-21 12:31:27,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:27,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 12:31:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:27,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:27,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:27,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-21 12:31:27,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:27,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-09-21 12:31:27,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:31:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-21 12:31:27,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:31:28,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009564300] [2020-09-21 12:31:28,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:28,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:31:28,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680821101] [2020-09-21 12:31:28,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:31:28,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:28,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:31:28,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:31:28,156 INFO L87 Difference]: Start difference. First operand 1494 states and 1916 transitions. Second operand 7 states. [2020-09-21 12:31:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:30,423 INFO L93 Difference]: Finished difference Result 4170 states and 5465 transitions. [2020-09-21 12:31:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:31:30,424 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 223 [2020-09-21 12:31:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:30,437 INFO L225 Difference]: With dead ends: 4170 [2020-09-21 12:31:30,437 INFO L226 Difference]: Without dead ends: 2682 [2020-09-21 12:31:30,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:31:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2020-09-21 12:31:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2378. [2020-09-21 12:31:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2378 states. [2020-09-21 12:31:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 2988 transitions. [2020-09-21 12:31:30,535 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 2988 transitions. Word has length 223 [2020-09-21 12:31:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:30,536 INFO L479 AbstractCegarLoop]: Abstraction has 2378 states and 2988 transitions. [2020-09-21 12:31:30,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:31:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 2988 transitions. [2020-09-21 12:31:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-09-21 12:31:30,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:30,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:30,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:31:30,545 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1529242287, now seen corresponding path program 1 times [2020-09-21 12:31:30,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:30,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033771267] [2020-09-21 12:31:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:30,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:30,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:31,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:31,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-09-21 12:31:31,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:31,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-21 12:31:31,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-09-21 12:31:31,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-21 12:31:31,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:31,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:31,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:31,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:31,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:31,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:31,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:31:31,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:31,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:31,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:31,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:31,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:31,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:31,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:31,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:31,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-21 12:31:31,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-21 12:31:31,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-21 12:31:31,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:31,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 12:31:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:31,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:31,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:31,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-21 12:31:31,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:31,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-21 12:31:31,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:31:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-21 12:31:31,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:31:32,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033771267] [2020-09-21 12:31:32,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:32,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:31:32,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055313818] [2020-09-21 12:31:32,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:31:32,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:31:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:31:32,151 INFO L87 Difference]: Start difference. First operand 2378 states and 2988 transitions. Second operand 7 states. [2020-09-21 12:31:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:33,925 INFO L93 Difference]: Finished difference Result 5922 states and 7494 transitions. [2020-09-21 12:31:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:31:33,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-09-21 12:31:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:33,944 INFO L225 Difference]: With dead ends: 5922 [2020-09-21 12:31:33,944 INFO L226 Difference]: Without dead ends: 3550 [2020-09-21 12:31:33,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:31:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-09-21 12:31:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2966. [2020-09-21 12:31:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2966 states. [2020-09-21 12:31:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 3774 transitions. [2020-09-21 12:31:34,030 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 3774 transitions. Word has length 232 [2020-09-21 12:31:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:34,031 INFO L479 AbstractCegarLoop]: Abstraction has 2966 states and 3774 transitions. [2020-09-21 12:31:34,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:31:34,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 3774 transitions. [2020-09-21 12:31:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-09-21 12:31:34,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:34,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:34,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:31:34,038 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1948168109, now seen corresponding path program 1 times [2020-09-21 12:31:34,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:34,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591413621] [2020-09-21 12:31:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:34,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:34,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:35,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:35,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-09-21 12:31:35,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-09-21 12:31:35,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-21 12:31:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-21 12:31:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:35,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:35,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:35,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:35,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:35,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:35,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:31:35,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:35,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:35,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:35,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:35,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:35,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:35,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-21 12:31:35,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:35,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 12:31:35,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:35,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:35,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:35,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 12:31:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:35,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 12:31:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:35,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:35,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:35,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-21 12:31:35,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-21 12:31:35,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:31:35,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-21 12:31:35,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:31:35,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591413621] [2020-09-21 12:31:35,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:35,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:31:35,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091505441] [2020-09-21 12:31:35,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:31:35,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:35,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:31:35,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:31:35,878 INFO L87 Difference]: Start difference. First operand 2966 states and 3774 transitions. Second operand 7 states. [2020-09-21 12:31:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:37,845 INFO L93 Difference]: Finished difference Result 6228 states and 7923 transitions. [2020-09-21 12:31:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:31:37,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 242 [2020-09-21 12:31:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:37,863 INFO L225 Difference]: With dead ends: 6228 [2020-09-21 12:31:37,863 INFO L226 Difference]: Without dead ends: 3268 [2020-09-21 12:31:37,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:31:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2020-09-21 12:31:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 3115. [2020-09-21 12:31:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3115 states. [2020-09-21 12:31:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 3944 transitions. [2020-09-21 12:31:37,948 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 3944 transitions. Word has length 242 [2020-09-21 12:31:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:37,949 INFO L479 AbstractCegarLoop]: Abstraction has 3115 states and 3944 transitions. [2020-09-21 12:31:37,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:31:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 3944 transitions. [2020-09-21 12:31:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-09-21 12:31:37,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:37,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:37,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:31:37,956 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash -625459260, now seen corresponding path program 1 times [2020-09-21 12:31:37,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:37,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160186597] [2020-09-21 12:31:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:38,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:38,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:39,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:39,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-09-21 12:31:39,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:39,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-09-21 12:31:39,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-09-21 12:31:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 12:31:39,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:39,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:39,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:39,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:39,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:39,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:31:39,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:39,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:39,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:39,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:39,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:39,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:39,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:39,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:39,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-21 12:31:39,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:39,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-21 12:31:39,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:39,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:39,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:39,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-21 12:31:39,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:39,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 12:31:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:39,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:39,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:39,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-09-21 12:31:39,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:31:39,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-09-21 12:31:39,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:39,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:39,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:31:39,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-21 12:31:39,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:31:39,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160186597] [2020-09-21 12:31:39,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:39,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:31:39,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049482414] [2020-09-21 12:31:39,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:31:39,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:31:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:31:39,714 INFO L87 Difference]: Start difference. First operand 3115 states and 3944 transitions. Second operand 7 states. [2020-09-21 12:31:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:41,164 INFO L93 Difference]: Finished difference Result 6347 states and 8471 transitions. [2020-09-21 12:31:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:31:41,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 245 [2020-09-21 12:31:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:41,184 INFO L225 Difference]: With dead ends: 6347 [2020-09-21 12:31:41,185 INFO L226 Difference]: Without dead ends: 3211 [2020-09-21 12:31:41,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:31:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2020-09-21 12:31:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 3115. [2020-09-21 12:31:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3115 states. [2020-09-21 12:31:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 3930 transitions. [2020-09-21 12:31:41,279 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 3930 transitions. Word has length 245 [2020-09-21 12:31:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:41,280 INFO L479 AbstractCegarLoop]: Abstraction has 3115 states and 3930 transitions. [2020-09-21 12:31:41,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:31:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 3930 transitions. [2020-09-21 12:31:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-09-21 12:31:41,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:41,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:41,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:31:41,287 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1528421575, now seen corresponding path program 1 times [2020-09-21 12:31:41,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:41,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251713196] [2020-09-21 12:31:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:41,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:42,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:42,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-09-21 12:31:42,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:31:42,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-21 12:31:42,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:42,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:42,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-09-21 12:31:42,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:31:42,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:42,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:42,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:42,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:42,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:42,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:42,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:31:42,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:42,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:42,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:42,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:42,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:42,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-21 12:31:42,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 12:31:42,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:42,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:42,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:42,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 12:31:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:42,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:42,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:42,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-21 12:31:42,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:42,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-21 12:31:42,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:42,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:42,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-21 12:31:42,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-21 12:31:42,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251713196] [2020-09-21 12:31:42,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:42,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:31:42,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361236857] [2020-09-21 12:31:42,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:31:42,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:42,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:31:42,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:31:42,767 INFO L87 Difference]: Start difference. First operand 3115 states and 3930 transitions. Second operand 5 states. [2020-09-21 12:31:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:44,106 INFO L93 Difference]: Finished difference Result 6230 states and 7877 transitions. [2020-09-21 12:31:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:31:44,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2020-09-21 12:31:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:44,120 INFO L225 Difference]: With dead ends: 6230 [2020-09-21 12:31:44,120 INFO L226 Difference]: Without dead ends: 3121 [2020-09-21 12:31:44,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:31:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2020-09-21 12:31:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2672. [2020-09-21 12:31:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2672 states. [2020-09-21 12:31:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3040 transitions. [2020-09-21 12:31:44,181 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3040 transitions. Word has length 252 [2020-09-21 12:31:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:44,182 INFO L479 AbstractCegarLoop]: Abstraction has 2672 states and 3040 transitions. [2020-09-21 12:31:44,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:31:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3040 transitions. [2020-09-21 12:31:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-09-21 12:31:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:44,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:44,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:31:44,191 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:44,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1066213847, now seen corresponding path program 1 times [2020-09-21 12:31:44,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:44,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425281998] [2020-09-21 12:31:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:44,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:45,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:45,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:45,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-09-21 12:31:45,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:31:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:31:45,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 251 [2020-09-21 12:31:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:31:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:45,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:45,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:45,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:45,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:31:45,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:45,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:45,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:45,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:45,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:45,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-21 12:31:45,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:45,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 12:31:45,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:45,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:45,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:45,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:45,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:31:45,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 12:31:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:45,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:45,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-21 12:31:45,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:45,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-21 12:31:45,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:45,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:45,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:45,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-21 12:31:45,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-09-21 12:31:45,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425281998] [2020-09-21 12:31:45,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:45,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:31:45,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208602725] [2020-09-21 12:31:45,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:31:45,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:31:45,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:31:45,732 INFO L87 Difference]: Start difference. First operand 2672 states and 3040 transitions. Second operand 5 states. [2020-09-21 12:31:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:31:46,894 INFO L93 Difference]: Finished difference Result 3407 states and 3922 transitions. [2020-09-21 12:31:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:31:46,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 284 [2020-09-21 12:31:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:31:46,906 INFO L225 Difference]: With dead ends: 3407 [2020-09-21 12:31:46,907 INFO L226 Difference]: Without dead ends: 3405 [2020-09-21 12:31:46,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:31:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3405 states. [2020-09-21 12:31:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3405 to 2674. [2020-09-21 12:31:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2020-09-21 12:31:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3043 transitions. [2020-09-21 12:31:46,964 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3043 transitions. Word has length 284 [2020-09-21 12:31:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:31:46,964 INFO L479 AbstractCegarLoop]: Abstraction has 2674 states and 3043 transitions. [2020-09-21 12:31:46,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:31:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3043 transitions. [2020-09-21 12:31:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-09-21 12:31:46,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:31:46,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:31:46,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:31:46,972 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:31:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:31:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1074962597, now seen corresponding path program 1 times [2020-09-21 12:31:46,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:31:46,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375565905] [2020-09-21 12:31:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:31:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:47,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:48,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:48,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 368 [2020-09-21 12:31:48,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:31:48,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-09-21 12:31:48,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:48,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:48,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-21 12:31:48,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-21 12:31:48,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:48,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:31:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:48,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:48,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:48,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:31:48,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:48,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:31:48,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:48,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:48,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:48,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:31:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:48,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:48,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:48,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-21 12:31:48,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 12:31:48,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:31:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:31:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:48,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-21 12:31:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:48,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:48,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 12:31:48,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 12:31:48,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:31:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:31:48,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-21 12:31:48,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:48,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-09-21 12:31:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:31:48,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:31:48,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:31:48,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-09-21 12:31:48,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:31:48,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-09-21 12:31:48,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:31:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:31:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:31:48,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-21 12:31:48,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:31:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 303 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-09-21 12:31:48,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375565905] [2020-09-21 12:31:48,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:31:48,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:31:48,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129089995] [2020-09-21 12:31:48,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:31:48,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:31:48,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:31:48,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:31:48,774 INFO L87 Difference]: Start difference. First operand 2674 states and 3043 transitions. Second operand 7 states.