/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:47:36,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:47:36,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:47:36,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:47:36,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:47:36,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:47:36,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:47:36,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:47:36,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:47:36,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:47:36,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:47:36,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:47:36,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:47:36,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:47:36,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:47:36,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:47:36,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:47:36,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:47:36,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:47:36,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:47:36,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:47:36,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:47:36,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:47:36,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:47:36,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:47:36,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:47:36,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:47:36,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:47:36,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:47:36,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:47:36,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:47:36,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:47:36,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:47:36,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:47:36,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:47:36,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:47:36,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:47:36,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:47:36,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:47:36,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:47:36,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:47:36,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:47:36,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:47:36,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:47:36,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:47:36,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:47:36,594 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:47:36,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:47:36,594 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:47:36,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:47:36,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:47:36,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:47:36,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:47:36,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:47:36,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:47:36,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:47:36,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:47:36,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:47:36,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:47:36,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:47:36,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:47:36,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:47:36,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:47:36,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:47:36,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:47:36,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:47:36,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:47:36,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:47:36,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:47:36,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:47:36,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:47:36,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:47:36,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:47:36,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:47:36,892 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:47:36,893 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:47:36,894 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:47:36,894 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2020-10-14 17:47:36,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22b6c919b/71db84f38e184367af267b3a90510044/FLAGb8d6acf7d [2020-10-14 17:47:37,447 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:47:37,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2020-10-14 17:47:37,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22b6c919b/71db84f38e184367af267b3a90510044/FLAGb8d6acf7d [2020-10-14 17:47:37,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22b6c919b/71db84f38e184367af267b3a90510044 [2020-10-14 17:47:37,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:47:37,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:47:37,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:47:37,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:47:37,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:47:37,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:37" (1/1) ... [2020-10-14 17:47:37,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780fc4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:37, skipping insertion in model container [2020-10-14 17:47:37,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:47:37" (1/1) ... [2020-10-14 17:47:37,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:47:37,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:47:38,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:47:38,037 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:47:38,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:47:38,165 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:47:38,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38 WrapperNode [2020-10-14 17:47:38,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:47:38,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:47:38,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:47:38,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:47:38,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... [2020-10-14 17:47:38,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:47:38,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:47:38,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:47:38,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:47:38,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:47:38,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:47:38,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:47:38,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:47:38,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:47:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:47:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:47:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:47:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:47:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:47:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:47:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:47:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:47:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:47:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:47:38,544 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:47:38,545 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 17:47:38,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:38 BoogieIcfgContainer [2020-10-14 17:47:38,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:47:38,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:47:38,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:47:38,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:47:38,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:47:37" (1/3) ... [2020-10-14 17:47:38,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa48290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:38, skipping insertion in model container [2020-10-14 17:47:38,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:47:38" (2/3) ... [2020-10-14 17:47:38,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa48290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:47:38, skipping insertion in model container [2020-10-14 17:47:38,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:47:38" (3/3) ... [2020-10-14 17:47:38,572 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2020-10-14 17:47:38,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:47:38,607 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:47:38,626 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:47:38,651 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:47:38,651 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:47:38,651 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:47:38,652 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:47:38,652 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:47:38,652 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:47:38,652 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:47:38,652 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:47:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-14 17:47:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:47:38,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:38,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:38,681 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1296691801, now seen corresponding path program 1 times [2020-10-14 17:47:38,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:38,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297819984] [2020-10-14 17:47:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:38,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:38,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:38,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:47:38,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:38,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-14 17:47:38,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:38,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:38,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:47:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:38,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:47:39,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:39,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:39,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:39,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 17:47:39,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:39,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:39,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:39,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:39,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297819984] [2020-10-14 17:47:39,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:47:39,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 17:47:39,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62053665] [2020-10-14 17:47:39,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 17:47:39,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 17:47:39,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 17:47:39,063 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-14 17:47:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:39,194 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2020-10-14 17:47:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 17:47:39,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 17:47:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:39,205 INFO L225 Difference]: With dead ends: 54 [2020-10-14 17:47:39,205 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 17:47:39,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 17:47:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 17:47:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 17:47:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 17:47:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-14 17:47:39,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-14 17:47:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:39,245 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-14 17:47:39,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 17:47:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-14 17:47:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 17:47:39,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:39,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:39,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:47:39,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1547542812, now seen corresponding path program 1 times [2020-10-14 17:47:39,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:39,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667137113] [2020-10-14 17:47:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:39,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 17:47:39,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:39,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-14 17:47:39,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:39,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:39,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:47:39,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:39,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:47:39,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:39,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:39,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:39,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:39,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:47:39,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:39,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:39,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:39,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:39,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:39,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:39,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667137113] [2020-10-14 17:47:39,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:47:39,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:47:39,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310072339] [2020-10-14 17:47:39,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:47:39,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:47:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:47:39,523 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-14 17:47:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:39,605 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-14 17:47:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:47:39,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 17:47:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:39,608 INFO L225 Difference]: With dead ends: 46 [2020-10-14 17:47:39,608 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 17:47:39,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:47:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 17:47:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 17:47:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 17:47:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-14 17:47:39,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2020-10-14 17:47:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:39,618 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-14 17:47:39,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:47:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-14 17:47:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 17:47:39,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:39,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:39,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:47:39,620 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:39,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426810, now seen corresponding path program 1 times [2020-10-14 17:47:39,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:39,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344155898] [2020-10-14 17:47:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:39,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 17:47:39,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:39,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-14 17:47:39,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:39,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:39,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:47:39,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:39,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:47:39,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:39,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:39,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:39,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:39,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:39,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:39,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:39,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:39,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:39,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:39,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344155898] [2020-10-14 17:47:39,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:39,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:47:39,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454347855] [2020-10-14 17:47:39,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:47:39,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:47:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:47:39,855 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-10-14 17:47:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:39,935 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-14 17:47:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:47:39,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 17:47:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:39,937 INFO L225 Difference]: With dead ends: 48 [2020-10-14 17:47:39,937 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 17:47:39,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:47:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 17:47:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 17:47:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 17:47:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-14 17:47:39,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2020-10-14 17:47:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:39,945 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-14 17:47:39,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:47:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-14 17:47:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 17:47:39,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:39,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:39,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:47:39,947 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2134771544, now seen corresponding path program 2 times [2020-10-14 17:47:39,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:39,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823558390] [2020-10-14 17:47:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:39,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:39,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:40,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 17:47:40,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:40,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-14 17:47:40,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:40,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:40,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:47:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:47:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:40,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:40,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:40,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:40,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:40,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:40,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:40,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:40,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:40,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:40,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:40,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823558390] [2020-10-14 17:47:40,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:40,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:47:40,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894855815] [2020-10-14 17:47:40,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:47:40,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:40,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:47:40,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:47:40,236 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-14 17:47:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:40,318 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-14 17:47:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:47:40,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 17:47:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:40,320 INFO L225 Difference]: With dead ends: 50 [2020-10-14 17:47:40,320 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 17:47:40,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:47:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 17:47:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 17:47:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 17:47:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 17:47:40,328 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-10-14 17:47:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:40,328 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 17:47:40,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:47:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 17:47:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 17:47:40,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:40,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:40,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:47:40,330 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:40,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1221444810, now seen corresponding path program 3 times [2020-10-14 17:47:40,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:40,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496400047] [2020-10-14 17:47:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:40,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:40,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 17:47:40,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:40,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-14 17:47:40,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:40,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:47:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:47:40,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:40,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:40,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:40,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:40,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:40,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:47:40,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:40,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:40,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:40,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:40,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496400047] [2020-10-14 17:47:40,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:40,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:47:40,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815786437] [2020-10-14 17:47:40,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:47:40,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:40,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:47:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:47:40,592 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2020-10-14 17:47:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:40,712 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-14 17:47:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:47:40,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 17:47:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:40,713 INFO L225 Difference]: With dead ends: 52 [2020-10-14 17:47:40,714 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 17:47:40,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:47:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 17:47:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 17:47:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 17:47:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-14 17:47:40,726 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 22 [2020-10-14 17:47:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:40,726 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-14 17:47:40,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:47:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-14 17:47:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 17:47:40,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:40,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:40,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:47:40,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1024921708, now seen corresponding path program 4 times [2020-10-14 17:47:40,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:40,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821788873] [2020-10-14 17:47:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:40,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 17:47:41,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:41,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 17:47:41,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:47:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:47:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:41,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:41,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:41,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:41,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:47:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:41,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821788873] [2020-10-14 17:47:41,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:41,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:47:41,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923547505] [2020-10-14 17:47:41,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:47:41,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:47:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:47:41,173 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2020-10-14 17:47:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:41,288 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-14 17:47:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:47:41,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 17:47:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:41,290 INFO L225 Difference]: With dead ends: 54 [2020-10-14 17:47:41,290 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 17:47:41,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:47:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 17:47:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 17:47:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 17:47:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 17:47:41,297 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2020-10-14 17:47:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:41,297 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 17:47:41,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:47:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 17:47:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:47:41,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:41,298 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:41,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:47:41,299 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1144781710, now seen corresponding path program 5 times [2020-10-14 17:47:41,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:41,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678471116] [2020-10-14 17:47:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:47:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-14 17:47:41,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:47:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:47:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:41,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:41,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:41,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:41,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:41,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:41,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:41,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:41,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:41,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678471116] [2020-10-14 17:47:41,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:41,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:47:41,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946128875] [2020-10-14 17:47:41,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:47:41,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:41,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:47:41,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:47:41,626 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2020-10-14 17:47:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:41,734 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-14 17:47:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:47:41,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 17:47:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:41,735 INFO L225 Difference]: With dead ends: 56 [2020-10-14 17:47:41,736 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 17:47:41,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:47:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 17:47:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 17:47:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 17:47:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 17:47:41,742 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2020-10-14 17:47:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:41,742 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 17:47:41,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:47:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 17:47:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 17:47:41,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:41,744 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:41,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:47:41,744 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:41,744 INFO L82 PathProgramCache]: Analyzing trace with hash 366126640, now seen corresponding path program 6 times [2020-10-14 17:47:41,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:41,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598749569] [2020-10-14 17:47:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:41,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 17:47:42,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:42,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-14 17:47:42,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:47:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:47:42,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:42,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:42,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:42,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:42,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:42,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:42,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:42,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:42,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598749569] [2020-10-14 17:47:42,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:42,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:47:42,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211426232] [2020-10-14 17:47:42,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:47:42,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:47:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:47:42,082 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 10 states. [2020-10-14 17:47:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:42,180 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-14 17:47:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:47:42,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 17:47:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:42,182 INFO L225 Difference]: With dead ends: 58 [2020-10-14 17:47:42,182 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 17:47:42,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:47:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 17:47:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 17:47:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 17:47:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-14 17:47:42,188 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2020-10-14 17:47:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:42,188 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-14 17:47:42,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:47:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-14 17:47:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 17:47:42,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:42,190 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:42,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:47:42,190 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash -597086126, now seen corresponding path program 7 times [2020-10-14 17:47:42,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:42,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632812926] [2020-10-14 17:47:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 17:47:42,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:42,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-14 17:47:42,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:47:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:42,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:47:42,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:42,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:42,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:42,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:42,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:42,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:42,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:42,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:42,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:42,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:42,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:42,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632812926] [2020-10-14 17:47:42,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:42,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:47:42,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574618363] [2020-10-14 17:47:42,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:47:42,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:47:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:47:42,715 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2020-10-14 17:47:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:42,827 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-14 17:47:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:47:42,828 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 17:47:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:42,829 INFO L225 Difference]: With dead ends: 60 [2020-10-14 17:47:42,829 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 17:47:42,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:47:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 17:47:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 17:47:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 17:47:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-14 17:47:42,835 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 30 [2020-10-14 17:47:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:42,836 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-14 17:47:42,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:47:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-14 17:47:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 17:47:42,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:42,837 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:42,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:47:42,837 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1468381684, now seen corresponding path program 8 times [2020-10-14 17:47:42,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:42,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665678784] [2020-10-14 17:47:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:42,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:42,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:43,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 17:47:43,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-14 17:47:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:43,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:47:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:47:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:43,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:43,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:43,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:43,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:43,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:43,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:43,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:43,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:43,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:43,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665678784] [2020-10-14 17:47:43,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:43,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:47:43,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213060337] [2020-10-14 17:47:43,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:47:43,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:47:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:47:43,361 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 12 states. [2020-10-14 17:47:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:43,468 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-14 17:47:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:47:43,469 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 17:47:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:43,469 INFO L225 Difference]: With dead ends: 62 [2020-10-14 17:47:43,470 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 17:47:43,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:47:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 17:47:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 17:47:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 17:47:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-14 17:47:43,476 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 32 [2020-10-14 17:47:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:43,476 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-14 17:47:43,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:47:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-14 17:47:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 17:47:43,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:43,477 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:43,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:47:43,478 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2108056342, now seen corresponding path program 9 times [2020-10-14 17:47:43,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:43,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815649967] [2020-10-14 17:47:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:43,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:43,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:43,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 17:47:43,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:43,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-14 17:47:43,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:43,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:43,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:47:43,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:43,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:47:43,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:44,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:44,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:44,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:44,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:44,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:44,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:44,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:44,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:44,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:44,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815649967] [2020-10-14 17:47:44,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:44,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:47:44,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874133096] [2020-10-14 17:47:44,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:47:44,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:44,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:47:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:47:44,105 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 13 states. [2020-10-14 17:47:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:44,226 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-14 17:47:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:47:44,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 17:47:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:44,228 INFO L225 Difference]: With dead ends: 64 [2020-10-14 17:47:44,228 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 17:47:44,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:47:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 17:47:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 17:47:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 17:47:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-14 17:47:44,234 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 34 [2020-10-14 17:47:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:44,234 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-14 17:47:44,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:47:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-14 17:47:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:47:44,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:44,235 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:44,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:47:44,236 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:44,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:44,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1639887944, now seen corresponding path program 10 times [2020-10-14 17:47:44,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:44,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362500865] [2020-10-14 17:47:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:44,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:44,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:44,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:44,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 17:47:44,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:44,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-14 17:47:44,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:44,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:44,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:47:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:44,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:47:44,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:44,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:44,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:44,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:44,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:44,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:44,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:44,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:44,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:44,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:44,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362500865] [2020-10-14 17:47:44,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:44,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:47:44,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275372271] [2020-10-14 17:47:44,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:47:44,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:47:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:47:44,991 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 14 states. [2020-10-14 17:47:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:45,119 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-14 17:47:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:47:45,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 17:47:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:45,120 INFO L225 Difference]: With dead ends: 66 [2020-10-14 17:47:45,120 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 17:47:45,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:47:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 17:47:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 17:47:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 17:47:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-14 17:47:45,127 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 36 [2020-10-14 17:47:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:45,128 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-14 17:47:45,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:47:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-14 17:47:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:47:45,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:45,133 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:45,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:47:45,133 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash 63214554, now seen corresponding path program 11 times [2020-10-14 17:47:45,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:45,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149449448] [2020-10-14 17:47:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:45,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:46,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:47:46,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:46,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 956 [2020-10-14 17:47:46,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:46,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:47:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:46,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:47:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:46,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:46,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:46,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:46,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:46,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:46,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:46,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:46,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:46,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:46,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149449448] [2020-10-14 17:47:46,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:46,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:47:46,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830912250] [2020-10-14 17:47:46,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:47:46,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:46,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:47:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:47:46,316 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 15 states. [2020-10-14 17:47:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:46,489 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-14 17:47:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:47:46,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 17:47:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:46,491 INFO L225 Difference]: With dead ends: 68 [2020-10-14 17:47:46,491 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 17:47:46,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:47:46,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 17:47:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 17:47:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 17:47:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-14 17:47:46,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 38 [2020-10-14 17:47:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:46,504 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-14 17:47:46,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:47:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-14 17:47:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 17:47:46,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:46,506 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:46,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:47:46,506 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:46,507 INFO L82 PathProgramCache]: Analyzing trace with hash 362175356, now seen corresponding path program 12 times [2020-10-14 17:47:46,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:46,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106682173] [2020-10-14 17:47:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 17:47:47,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-14 17:47:47,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:47:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:47:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:47,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:47,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:47,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:47,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:47,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:47,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:47,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:47,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:47,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:47,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:47,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106682173] [2020-10-14 17:47:47,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:47,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:47:47,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052766072] [2020-10-14 17:47:47,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:47:47,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:47:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:47,602 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 16 states. [2020-10-14 17:47:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:47,758 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-14 17:47:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:47:47,759 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 17:47:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:47,760 INFO L225 Difference]: With dead ends: 70 [2020-10-14 17:47:47,760 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 17:47:47,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 17:47:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 17:47:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 17:47:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-14 17:47:47,765 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 40 [2020-10-14 17:47:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:47,766 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-14 17:47:47,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:47:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-14 17:47:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 17:47:47,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:47,767 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:47,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:47:47,767 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash -99302754, now seen corresponding path program 13 times [2020-10-14 17:47:47,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:47,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979948392] [2020-10-14 17:47:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:47,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:48,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 17:47:48,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-14 17:47:48,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:48,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:47:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:47:48,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:48,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:48,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:48,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:48,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:48,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:48,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:48,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:48,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:48,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979948392] [2020-10-14 17:47:48,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:48,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:47:48,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080594976] [2020-10-14 17:47:48,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:47:48,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:47:48,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:47:48,858 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 17 states. [2020-10-14 17:47:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:49,015 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-14 17:47:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:47:49,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-14 17:47:49,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:49,017 INFO L225 Difference]: With dead ends: 72 [2020-10-14 17:47:49,017 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:47:49,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:47:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:47:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 17:47:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 17:47:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-14 17:47:49,025 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 42 [2020-10-14 17:47:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:49,026 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-14 17:47:49,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:47:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-14 17:47:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:47:49,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:49,029 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:49,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:47:49,030 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1198134976, now seen corresponding path program 14 times [2020-10-14 17:47:49,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:49,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708352270] [2020-10-14 17:47:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:49,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:50,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:47:50,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:50,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-14 17:47:50,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:50,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:50,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:47:50,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:50,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:47:50,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:50,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:50,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:50,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:50,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:50,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:50,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:50,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:50,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:50,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:50,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708352270] [2020-10-14 17:47:50,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:50,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:47:50,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746140174] [2020-10-14 17:47:50,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:47:50,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:47:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:47:50,271 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 18 states. [2020-10-14 17:47:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:50,389 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-14 17:47:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:47:50,389 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 17:47:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:50,390 INFO L225 Difference]: With dead ends: 74 [2020-10-14 17:47:50,390 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 17:47:50,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:47:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 17:47:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 17:47:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:47:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-14 17:47:50,399 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 44 [2020-10-14 17:47:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:50,399 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-14 17:47:50,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:47:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-14 17:47:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:47:50,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:50,404 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:50,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:47:50,404 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -613945502, now seen corresponding path program 15 times [2020-10-14 17:47:50,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:50,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415754999] [2020-10-14 17:47:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:50,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:51,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:47:51,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:51,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-14 17:47:51,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:51,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:51,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:47:51,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:51,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:47:51,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:51,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:51,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:51,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:51,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:51,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:51,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:51,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:51,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:51,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415754999] [2020-10-14 17:47:51,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:51,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:47:51,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171893736] [2020-10-14 17:47:51,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:47:51,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:47:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:47:51,525 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 19 states. [2020-10-14 17:47:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:51,677 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-14 17:47:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:47:51,678 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 17:47:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:51,679 INFO L225 Difference]: With dead ends: 76 [2020-10-14 17:47:51,679 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 17:47:51,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:47:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 17:47:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 17:47:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 17:47:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-14 17:47:51,684 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 46 [2020-10-14 17:47:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:51,684 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-14 17:47:51,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:47:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-14 17:47:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 17:47:51,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:51,685 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:51,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:47:51,685 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1848576764, now seen corresponding path program 16 times [2020-10-14 17:47:51,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:51,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114852593] [2020-10-14 17:47:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:51,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:51,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:52,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:52,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 17:47:52,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:52,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-10-14 17:47:52,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:52,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:47:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:47:52,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:53,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:53,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:53,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:53,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:53,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:53,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:53,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:53,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:53,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:53,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:53,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:53,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:53,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114852593] [2020-10-14 17:47:53,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:53,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:47:53,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539117580] [2020-10-14 17:47:53,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:47:53,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:47:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:47:53,265 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 20 states. [2020-10-14 17:47:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:53,454 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-14 17:47:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:47:53,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-14 17:47:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:53,455 INFO L225 Difference]: With dead ends: 78 [2020-10-14 17:47:53,456 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 17:47:53,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:47:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 17:47:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 17:47:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 17:47:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-14 17:47:53,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 48 [2020-10-14 17:47:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:53,463 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-14 17:47:53,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:47:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-14 17:47:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 17:47:53,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:53,464 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:53,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:47:53,464 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1376721446, now seen corresponding path program 17 times [2020-10-14 17:47:53,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:53,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303774734] [2020-10-14 17:47:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:53,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:54,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:54,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 17:47:54,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:54,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-14 17:47:54,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:54,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:54,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:47:54,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:54,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:47:54,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:54,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:54,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:54,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:54,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:54,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:47:54,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:55,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:55,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:47:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:55,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303774734] [2020-10-14 17:47:55,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:55,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:47:55,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374198245] [2020-10-14 17:47:55,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:47:55,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:47:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:47:55,012 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 21 states. [2020-10-14 17:47:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:55,189 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-14 17:47:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:47:55,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-14 17:47:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:55,190 INFO L225 Difference]: With dead ends: 80 [2020-10-14 17:47:55,190 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 17:47:55,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:47:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 17:47:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 17:47:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 17:47:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-14 17:47:55,197 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 50 [2020-10-14 17:47:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:55,197 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-14 17:47:55,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:47:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-14 17:47:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 17:47:55,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:55,198 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:55,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:47:55,198 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:55,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash -78086456, now seen corresponding path program 18 times [2020-10-14 17:47:55,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:55,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747253970] [2020-10-14 17:47:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:55,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:55,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:56,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 17:47:56,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:56,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-14 17:47:56,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:56,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:56,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:47:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:56,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:47:56,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:56,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:56,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:56,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:56,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:56,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:56,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:56,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:56,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:56,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:56,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:56,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747253970] [2020-10-14 17:47:56,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:56,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:47:56,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353120851] [2020-10-14 17:47:56,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:47:56,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:56,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:47:56,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:47:56,769 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 22 states. [2020-10-14 17:47:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:56,933 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-14 17:47:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:47:56,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 17:47:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:56,934 INFO L225 Difference]: With dead ends: 82 [2020-10-14 17:47:56,934 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 17:47:56,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:47:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 17:47:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 17:47:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 17:47:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-14 17:47:56,939 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 52 [2020-10-14 17:47:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:56,940 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-14 17:47:56,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:47:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-14 17:47:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:47:56,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:56,941 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:56,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:47:56,942 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2010858218, now seen corresponding path program 19 times [2020-10-14 17:47:56,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:56,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834137073] [2020-10-14 17:47:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:56,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:56,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:58,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:58,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:47:58,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:47:58,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-14 17:47:58,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:58,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:58,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:47:58,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:47:58,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:47:58,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:58,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:58,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:58,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:58,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:58,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:58,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:58,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834137073] [2020-10-14 17:47:58,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:58,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:47:58,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177009145] [2020-10-14 17:47:58,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:47:58,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:47:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:47:58,490 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 23 states. [2020-10-14 17:47:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:58,602 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-10-14 17:47:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:47:58,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-14 17:47:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:58,603 INFO L225 Difference]: With dead ends: 84 [2020-10-14 17:47:58,604 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 17:47:58,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:47:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 17:47:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 17:47:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 17:47:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-14 17:47:58,612 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 54 [2020-10-14 17:47:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:58,613 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-14 17:47:58,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:47:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-14 17:47:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 17:47:58,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:58,613 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:58,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:47:58,614 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash -558004596, now seen corresponding path program 20 times [2020-10-14 17:47:58,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:58,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762418691] [2020-10-14 17:47:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:58,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:58,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:00,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:00,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 17:48:00,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:00,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-14 17:48:00,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:00,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:00,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:48:00,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:00,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:48:00,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:00,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:00,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:00,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:00,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:00,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:00,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:00,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:00,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:00,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:00,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:00,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:00,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:00,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762418691] [2020-10-14 17:48:00,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:00,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:48:00,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246128760] [2020-10-14 17:48:00,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:48:00,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:48:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:48:00,331 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 24 states. [2020-10-14 17:48:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:00,510 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-14 17:48:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:48:00,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-14 17:48:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:00,513 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:48:00,513 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 17:48:00,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:48:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 17:48:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 17:48:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 17:48:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-14 17:48:00,518 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 56 [2020-10-14 17:48:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:00,518 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-14 17:48:00,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:48:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-14 17:48:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 17:48:00,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:00,521 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:00,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:48:00,523 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:00,524 INFO L82 PathProgramCache]: Analyzing trace with hash 371026350, now seen corresponding path program 21 times [2020-10-14 17:48:00,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:00,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956224343] [2020-10-14 17:48:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:00,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:00,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:01,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:01,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 17:48:01,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:01,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1395 [2020-10-14 17:48:01,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:01,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:01,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:48:01,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:48:01,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:02,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:02,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:02,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:02,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:02,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:02,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:02,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:02,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:02,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:02,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:02,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:02,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:02,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956224343] [2020-10-14 17:48:02,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:02,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:48:02,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783912392] [2020-10-14 17:48:02,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:48:02,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:48:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:48:02,269 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 25 states. [2020-10-14 17:48:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:02,442 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-14 17:48:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:48:02,443 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-14 17:48:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:02,444 INFO L225 Difference]: With dead ends: 88 [2020-10-14 17:48:02,444 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 17:48:02,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:48:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 17:48:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 17:48:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 17:48:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-14 17:48:02,451 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 58 [2020-10-14 17:48:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:02,451 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-14 17:48:02,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:48:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-14 17:48:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:48:02,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:02,452 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:02,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:48:02,453 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:02,453 INFO L82 PathProgramCache]: Analyzing trace with hash -183432112, now seen corresponding path program 22 times [2020-10-14 17:48:02,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:02,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291128081] [2020-10-14 17:48:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:03,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:03,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:48:03,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:03,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1317 [2020-10-14 17:48:03,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:03,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:48:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:48:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:04,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:04,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:04,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:04,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:04,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:04,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:04,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:04,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:04,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:04,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:04,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:04,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:04,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291128081] [2020-10-14 17:48:04,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:04,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:48:04,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170067867] [2020-10-14 17:48:04,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:48:04,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:04,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:48:04,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:48:04,200 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 26 states. [2020-10-14 17:48:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:04,419 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-10-14 17:48:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:48:04,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-14 17:48:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:04,420 INFO L225 Difference]: With dead ends: 90 [2020-10-14 17:48:04,420 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 17:48:04,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:48:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 17:48:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-14 17:48:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 17:48:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-14 17:48:04,425 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 60 [2020-10-14 17:48:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:04,425 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-14 17:48:04,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:48:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-14 17:48:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:48:04,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:04,426 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:04,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:48:04,426 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash -442069390, now seen corresponding path program 23 times [2020-10-14 17:48:04,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:04,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341397374] [2020-10-14 17:48:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:04,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:05,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:05,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:48:05,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:05,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-14 17:48:05,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:05,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:05,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:48:05,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:05,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:48:05,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:06,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:06,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:06,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:06,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:06,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:48:06,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:06,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:06,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:06,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:06,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:06,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:06,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341397374] [2020-10-14 17:48:06,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:06,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:48:06,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766349693] [2020-10-14 17:48:06,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:48:06,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:48:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:48:06,027 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 27 states. [2020-10-14 17:48:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:06,299 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-14 17:48:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:48:06,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-14 17:48:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:06,301 INFO L225 Difference]: With dead ends: 92 [2020-10-14 17:48:06,301 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 17:48:06,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:48:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 17:48:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 17:48:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 17:48:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-14 17:48:06,307 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 62 [2020-10-14 17:48:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:06,307 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-14 17:48:06,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:48:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-14 17:48:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 17:48:06,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:06,309 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:06,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:48:06,309 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:06,310 INFO L82 PathProgramCache]: Analyzing trace with hash 115609620, now seen corresponding path program 24 times [2020-10-14 17:48:06,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:06,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383158642] [2020-10-14 17:48:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:06,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:07,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:07,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 17:48:07,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:07,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1450 [2020-10-14 17:48:07,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:07,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:07,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:48:07,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:07,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:48:07,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:08,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:08,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:08,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:08,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:08,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:08,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:08,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:08,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:48:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:08,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383158642] [2020-10-14 17:48:08,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:08,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:48:08,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600736368] [2020-10-14 17:48:08,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:48:08,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:08,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:48:08,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:48:08,204 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 28 states. [2020-10-14 17:48:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:08,358 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-14 17:48:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:48:08,358 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-14 17:48:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:08,359 INFO L225 Difference]: With dead ends: 94 [2020-10-14 17:48:08,359 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 17:48:08,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:48:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 17:48:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-14 17:48:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 17:48:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2020-10-14 17:48:08,370 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 64 [2020-10-14 17:48:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:08,370 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2020-10-14 17:48:08,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:48:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2020-10-14 17:48:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 17:48:08,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:08,371 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:08,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:48:08,372 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash -825773770, now seen corresponding path program 25 times [2020-10-14 17:48:08,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:08,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663552989] [2020-10-14 17:48:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:08,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:08,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:09,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:09,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 17:48:09,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:09,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-14 17:48:09,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:09,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:48:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:48:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:10,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:10,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:10,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:10,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:10,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:10,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:10,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:10,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:10,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:10,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:10,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663552989] [2020-10-14 17:48:10,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:10,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:48:10,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698431380] [2020-10-14 17:48:10,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:48:10,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:48:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:48:10,254 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 29 states. [2020-10-14 17:48:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:10,467 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-14 17:48:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:48:10,467 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-14 17:48:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:10,468 INFO L225 Difference]: With dead ends: 96 [2020-10-14 17:48:10,469 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 17:48:10,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:48:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 17:48:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 17:48:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 17:48:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-14 17:48:10,475 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 66 [2020-10-14 17:48:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:10,475 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-14 17:48:10,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:48:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-14 17:48:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:48:10,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:10,476 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:10,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:48:10,476 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash 742887896, now seen corresponding path program 26 times [2020-10-14 17:48:10,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:10,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129462587] [2020-10-14 17:48:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:10,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:10,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:12,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:48:12,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:12,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-14 17:48:12,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:12,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:12,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:48:12,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:48:12,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:12,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:12,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:12,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:12,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:12,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:12,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129462587] [2020-10-14 17:48:12,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:12,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:48:12,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292796721] [2020-10-14 17:48:12,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:48:12,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:48:12,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:48:12,545 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 30 states. [2020-10-14 17:48:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:12,693 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-14 17:48:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:48:12,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-14 17:48:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:12,695 INFO L225 Difference]: With dead ends: 98 [2020-10-14 17:48:12,695 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 17:48:12,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:48:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 17:48:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 17:48:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 17:48:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-14 17:48:12,702 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 68 [2020-10-14 17:48:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:12,704 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-14 17:48:12,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:48:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-14 17:48:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 17:48:12,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:12,706 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:12,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:48:12,707 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash 693228026, now seen corresponding path program 27 times [2020-10-14 17:48:12,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:12,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144616685] [2020-10-14 17:48:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:12,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:12,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:14,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:14,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 17:48:14,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:14,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-10-14 17:48:14,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:14,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:14,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:48:14,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:14,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:48:14,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:14,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:14,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:14,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:14,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:14,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:14,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:14,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:14,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:14,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144616685] [2020-10-14 17:48:14,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:14,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:48:14,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210806845] [2020-10-14 17:48:14,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:48:14,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:14,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:48:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:48:14,930 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 31 states. [2020-10-14 17:48:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:15,191 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-10-14 17:48:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:48:15,191 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 17:48:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:15,192 INFO L225 Difference]: With dead ends: 100 [2020-10-14 17:48:15,192 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 17:48:15,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:48:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 17:48:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-14 17:48:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 17:48:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-14 17:48:15,202 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 70 [2020-10-14 17:48:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:15,203 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-14 17:48:15,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:48:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-14 17:48:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 17:48:15,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:15,204 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:15,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:48:15,204 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:15,205 INFO L82 PathProgramCache]: Analyzing trace with hash 214733212, now seen corresponding path program 28 times [2020-10-14 17:48:15,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:15,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717968522] [2020-10-14 17:48:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:16,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:16,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 17:48:16,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:16,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-14 17:48:16,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:16,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:48:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:48:16,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:17,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:17,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:17,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:17,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:17,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:17,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:17,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:17,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:17,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717968522] [2020-10-14 17:48:17,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:17,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:48:17,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090308199] [2020-10-14 17:48:17,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:48:17,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:17,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:48:17,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:48:17,199 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 32 states. [2020-10-14 17:48:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:17,440 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-10-14 17:48:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:48:17,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-14 17:48:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:17,442 INFO L225 Difference]: With dead ends: 102 [2020-10-14 17:48:17,442 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 17:48:17,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:48:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 17:48:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 17:48:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 17:48:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-14 17:48:17,447 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 72 [2020-10-14 17:48:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:17,448 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-14 17:48:17,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:48:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-14 17:48:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 17:48:17,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:17,449 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:17,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:48:17,449 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:17,449 INFO L82 PathProgramCache]: Analyzing trace with hash -57282370, now seen corresponding path program 29 times [2020-10-14 17:48:17,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:17,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887759757] [2020-10-14 17:48:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:17,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:17,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:19,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:19,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1711 [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:48:19,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:19,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:19,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:19,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:19,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:19,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:19,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:19,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887759757] [2020-10-14 17:48:19,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:19,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:48:19,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077137845] [2020-10-14 17:48:19,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:48:19,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:19,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:48:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:48:19,643 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 33 states. [2020-10-14 17:48:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:19,813 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-14 17:48:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:48:19,814 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 17:48:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:19,815 INFO L225 Difference]: With dead ends: 104 [2020-10-14 17:48:19,815 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 17:48:19,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:48:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 17:48:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 17:48:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 17:48:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-10-14 17:48:19,823 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 74 [2020-10-14 17:48:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:19,824 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-10-14 17:48:19,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:48:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-10-14 17:48:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 17:48:19,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:19,826 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:19,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:48:19,827 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:19,827 INFO L82 PathProgramCache]: Analyzing trace with hash 528748384, now seen corresponding path program 30 times [2020-10-14 17:48:19,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:19,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387516151] [2020-10-14 17:48:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:19,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:21,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2004 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:48:21,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:22,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:22,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:22,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:22,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:22,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:22,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:22,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:22,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:22,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:22,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387516151] [2020-10-14 17:48:22,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:22,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:48:22,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217140216] [2020-10-14 17:48:22,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:48:22,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:22,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:48:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:48:22,415 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 34 states. [2020-10-14 17:48:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:22,555 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2020-10-14 17:48:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:48:22,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-14 17:48:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:22,556 INFO L225 Difference]: With dead ends: 106 [2020-10-14 17:48:22,556 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 17:48:22,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:48:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 17:48:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 17:48:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 17:48:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-10-14 17:48:22,561 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 76 [2020-10-14 17:48:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:22,561 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-10-14 17:48:22,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:48:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-10-14 17:48:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 17:48:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:22,562 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:22,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:48:22,563 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1063587202, now seen corresponding path program 31 times [2020-10-14 17:48:22,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:22,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766964138] [2020-10-14 17:48:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:22,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:24,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:24,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 17:48:24,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:24,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-10-14 17:48:24,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:24,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:24,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:48:24,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:24,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:48:24,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:25,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:25,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:25,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:25,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:25,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:25,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:25,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:25,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:25,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:25,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:25,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766964138] [2020-10-14 17:48:25,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:25,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:48:25,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592519744] [2020-10-14 17:48:25,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:48:25,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:25,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:48:25,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:48:25,230 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 35 states. [2020-10-14 17:48:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:25,392 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-14 17:48:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:48:25,392 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-14 17:48:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:25,394 INFO L225 Difference]: With dead ends: 108 [2020-10-14 17:48:25,394 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 17:48:25,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:48:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 17:48:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 17:48:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 17:48:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-14 17:48:25,399 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 78 [2020-10-14 17:48:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:25,399 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-14 17:48:25,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:48:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-14 17:48:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 17:48:25,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:25,400 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:25,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:48:25,401 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash -352384220, now seen corresponding path program 32 times [2020-10-14 17:48:25,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:25,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519068893] [2020-10-14 17:48:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:25,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:25,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:27,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:27,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2205 [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:48:27,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:28,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:28,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:28,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:28,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:28,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:28,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:28,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:28,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:28,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:28,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:28,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519068893] [2020-10-14 17:48:28,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:28,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:48:28,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048238901] [2020-10-14 17:48:28,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:48:28,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:28,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:48:28,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:48:28,248 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 36 states. [2020-10-14 17:48:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:28,427 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-10-14 17:48:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:48:28,427 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-14 17:48:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:28,429 INFO L225 Difference]: With dead ends: 110 [2020-10-14 17:48:28,430 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 17:48:28,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:48:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 17:48:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 17:48:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 17:48:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-14 17:48:28,440 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 80 [2020-10-14 17:48:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:28,442 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-14 17:48:28,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:48:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-14 17:48:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 17:48:28,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:28,443 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:28,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:48:28,444 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash 403712070, now seen corresponding path program 33 times [2020-10-14 17:48:28,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:28,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968714049] [2020-10-14 17:48:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:28,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:28,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:30,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:30,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 17:48:30,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:30,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2381 [2020-10-14 17:48:30,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:30,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:30,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:48:30,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:30,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:48:30,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:48:31,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:31,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:31,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:31,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:31,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:31,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:31,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:31,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:31,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:31,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968714049] [2020-10-14 17:48:31,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:31,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:48:31,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039766009] [2020-10-14 17:48:31,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:48:31,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:48:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:48:31,515 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 37 states. [2020-10-14 17:48:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:31,769 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2020-10-14 17:48:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:48:31,770 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-14 17:48:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:31,772 INFO L225 Difference]: With dead ends: 112 [2020-10-14 17:48:31,772 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 17:48:31,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:48:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 17:48:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 17:48:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 17:48:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-10-14 17:48:31,778 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 82 [2020-10-14 17:48:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:31,778 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-10-14 17:48:31,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:48:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-10-14 17:48:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 17:48:31,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:31,779 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:31,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:48:31,780 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:31,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1162773736, now seen corresponding path program 34 times [2020-10-14 17:48:31,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:31,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514714424] [2020-10-14 17:48:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:31,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:34,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:34,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 17:48:34,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2657 [2020-10-14 17:48:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:34,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:48:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:48:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:35,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:35,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:35,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:35,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:35,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:35,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:35,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:35,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:35,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514714424] [2020-10-14 17:48:35,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:35,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:48:35,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135140285] [2020-10-14 17:48:35,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:48:35,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:35,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:48:35,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:48:35,190 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 38 states. [2020-10-14 17:48:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:35,466 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2020-10-14 17:48:35,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:48:35,466 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-14 17:48:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:35,468 INFO L225 Difference]: With dead ends: 114 [2020-10-14 17:48:35,468 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 17:48:35,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:48:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 17:48:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 17:48:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 17:48:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2020-10-14 17:48:35,474 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 84 [2020-10-14 17:48:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:35,474 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2020-10-14 17:48:35,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:48:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2020-10-14 17:48:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 17:48:35,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:35,475 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:35,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:48:35,475 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash 476594442, now seen corresponding path program 35 times [2020-10-14 17:48:35,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:35,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251386824] [2020-10-14 17:48:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:35,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:35,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:38,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:38,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 17:48:38,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:38,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2747 [2020-10-14 17:48:38,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:38,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 17:48:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:48:38,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:38,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:38,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:38,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:38,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:38,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:38,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:38,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:38,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:38,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:38,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251386824] [2020-10-14 17:48:38,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:38,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 17:48:38,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693650892] [2020-10-14 17:48:38,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 17:48:38,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:38,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 17:48:38,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:48:38,980 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand 39 states. [2020-10-14 17:48:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:39,183 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-14 17:48:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 17:48:39,184 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-14 17:48:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:39,185 INFO L225 Difference]: With dead ends: 116 [2020-10-14 17:48:39,185 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 17:48:39,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:48:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 17:48:39,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 17:48:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 17:48:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-10-14 17:48:39,191 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 86 [2020-10-14 17:48:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:39,191 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-10-14 17:48:39,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 17:48:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-10-14 17:48:39,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 17:48:39,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:39,192 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:39,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:48:39,193 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1811710804, now seen corresponding path program 36 times [2020-10-14 17:48:39,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:39,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280644643] [2020-10-14 17:48:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:39,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:42,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:42,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 17:48:42,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:42,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2991 [2020-10-14 17:48:42,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:42,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:42,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 17:48:42,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:42,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 17:48:42,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:42,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:42,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:42,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:42,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:42,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:42,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:42,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:42,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:42,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280644643] [2020-10-14 17:48:42,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:42,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 17:48:42,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638391012] [2020-10-14 17:48:42,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 17:48:42,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 17:48:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:48:42,963 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 40 states. [2020-10-14 17:48:43,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:43,261 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-10-14 17:48:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 17:48:43,262 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-14 17:48:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:43,263 INFO L225 Difference]: With dead ends: 118 [2020-10-14 17:48:43,263 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 17:48:43,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:48:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 17:48:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 17:48:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 17:48:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-10-14 17:48:43,269 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 88 [2020-10-14 17:48:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:43,269 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-10-14 17:48:43,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 17:48:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-10-14 17:48:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 17:48:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:43,271 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:43,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:48:43,271 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1849796658, now seen corresponding path program 37 times [2020-10-14 17:48:43,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:43,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937034925] [2020-10-14 17:48:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:43,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:43,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:46,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:46,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 17:48:46,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:46,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3221 [2020-10-14 17:48:46,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:46,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 17:48:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 17:48:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:47,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:47,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:47,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:47,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:47,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:47,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:47,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:47,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:47,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937034925] [2020-10-14 17:48:47,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:47,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 17:48:47,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541028299] [2020-10-14 17:48:47,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 17:48:47,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:47,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 17:48:47,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:48:47,355 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 41 states. [2020-10-14 17:48:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:47,632 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2020-10-14 17:48:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 17:48:47,632 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-14 17:48:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:47,634 INFO L225 Difference]: With dead ends: 120 [2020-10-14 17:48:47,634 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 17:48:47,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 17:48:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 17:48:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-14 17:48:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 17:48:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-10-14 17:48:47,640 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 90 [2020-10-14 17:48:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:47,641 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-10-14 17:48:47,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 17:48:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-10-14 17:48:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 17:48:47,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:47,642 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:47,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 17:48:47,642 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash 204403312, now seen corresponding path program 38 times [2020-10-14 17:48:47,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:47,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459395532] [2020-10-14 17:48:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:47,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:50,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:50,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 17:48:50,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-14 17:48:50,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:50,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 17:48:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 17:48:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:50,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:50,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:50,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:50,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:50,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:50,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459395532] [2020-10-14 17:48:50,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:50,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 17:48:50,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66517300] [2020-10-14 17:48:50,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 17:48:50,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:50,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 17:48:50,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:48:50,938 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 42 states. [2020-10-14 17:48:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:51,152 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2020-10-14 17:48:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 17:48:51,153 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-14 17:48:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:51,154 INFO L225 Difference]: With dead ends: 122 [2020-10-14 17:48:51,154 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 17:48:51,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 17:48:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 17:48:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 17:48:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 17:48:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-14 17:48:51,160 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 92 [2020-10-14 17:48:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:51,160 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-14 17:48:51,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 17:48:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-14 17:48:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 17:48:51,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:51,162 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:51,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 17:48:51,162 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:51,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1394381678, now seen corresponding path program 39 times [2020-10-14 17:48:51,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:51,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407650628] [2020-10-14 17:48:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:51,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:53,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:53,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2568 [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 17:48:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:54,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:54,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:54,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:54,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:54,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:54,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:54,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407650628] [2020-10-14 17:48:54,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:54,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 17:48:54,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984548318] [2020-10-14 17:48:54,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 17:48:54,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 17:48:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 17:48:54,641 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 43 states. [2020-10-14 17:48:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:54,834 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-14 17:48:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 17:48:54,834 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-14 17:48:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:54,836 INFO L225 Difference]: With dead ends: 124 [2020-10-14 17:48:54,836 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 17:48:54,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 17:48:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 17:48:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-14 17:48:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 17:48:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2020-10-14 17:48:54,842 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 94 [2020-10-14 17:48:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:54,842 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2020-10-14 17:48:54,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 17:48:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2020-10-14 17:48:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 17:48:54,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:54,843 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:54,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 17:48:54,844 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash -228465100, now seen corresponding path program 40 times [2020-10-14 17:48:54,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:54,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564618435] [2020-10-14 17:48:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:54,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:54,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:57,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2757 [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:48:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 17:48:57,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:58,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:48:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:58,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:58,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:48:58,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:48:58,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:48:58,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:48:58,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:48:58,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:48:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:48:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:48:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:48:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:48:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:48:58,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564618435] [2020-10-14 17:48:58,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:48:58,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 17:48:58,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511425181] [2020-10-14 17:48:58,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 17:48:58,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:48:58,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 17:48:58,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 17:48:58,606 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand 44 states. [2020-10-14 17:48:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:48:58,805 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2020-10-14 17:48:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 17:48:58,805 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-14 17:48:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:48:58,806 INFO L225 Difference]: With dead ends: 126 [2020-10-14 17:48:58,806 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 17:48:58,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 17:48:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 17:48:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 17:48:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 17:48:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-10-14 17:48:58,811 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 96 [2020-10-14 17:48:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:48:58,811 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-10-14 17:48:58,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 17:48:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-10-14 17:48:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 17:48:58,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:48:58,812 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:48:58,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 17:48:58,812 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:48:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:48:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash -769097898, now seen corresponding path program 41 times [2020-10-14 17:48:58,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:48:58,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404651933] [2020-10-14 17:48:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:48:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:48:58,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:48:58,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:01,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:01,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2943 [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 17:49:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:02,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:02,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:02,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:02,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:02,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:02,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:02,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:02,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:02,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404651933] [2020-10-14 17:49:02,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:02,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 17:49:02,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294482140] [2020-10-14 17:49:02,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 17:49:02,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 17:49:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:49:02,813 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 45 states. [2020-10-14 17:49:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:03,044 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2020-10-14 17:49:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 17:49:03,045 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-14 17:49:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:03,046 INFO L225 Difference]: With dead ends: 128 [2020-10-14 17:49:03,046 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 17:49:03,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 17:49:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 17:49:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-14 17:49:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 17:49:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2020-10-14 17:49:03,052 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 98 [2020-10-14 17:49:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:03,053 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2020-10-14 17:49:03,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 17:49:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2020-10-14 17:49:03,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 17:49:03,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:03,054 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:03,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 17:49:03,054 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:03,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:03,054 INFO L82 PathProgramCache]: Analyzing trace with hash -626173960, now seen corresponding path program 42 times [2020-10-14 17:49:03,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:03,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59032483] [2020-10-14 17:49:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:03,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:03,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:06,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:06,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 17:49:06,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:06,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3272 [2020-10-14 17:49:06,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:06,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 17:49:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:06,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 17:49:06,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:07,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:07,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:07,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:07,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:07,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:49:07,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:07,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:07,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:07,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59032483] [2020-10-14 17:49:07,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:07,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 17:49:07,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430865718] [2020-10-14 17:49:07,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 17:49:07,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:07,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 17:49:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:49:07,412 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand 46 states. [2020-10-14 17:49:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:07,704 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2020-10-14 17:49:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 17:49:07,705 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-14 17:49:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:07,707 INFO L225 Difference]: With dead ends: 130 [2020-10-14 17:49:07,707 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 17:49:07,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 17:49:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 17:49:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 17:49:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 17:49:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2020-10-14 17:49:07,712 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 100 [2020-10-14 17:49:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:07,712 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2020-10-14 17:49:07,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 17:49:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2020-10-14 17:49:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 17:49:07,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:07,713 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:07,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 17:49:07,713 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:07,714 INFO L82 PathProgramCache]: Analyzing trace with hash -715223014, now seen corresponding path program 43 times [2020-10-14 17:49:07,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:07,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042272454] [2020-10-14 17:49:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:07,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:07,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:11,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:11,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 17:49:11,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:11,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3604 [2020-10-14 17:49:11,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:11,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 17:49:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 17:49:11,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:12,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:12,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:12,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:12,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042272454] [2020-10-14 17:49:12,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:12,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 17:49:12,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101746554] [2020-10-14 17:49:12,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 17:49:12,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 17:49:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 17:49:12,433 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand 47 states. [2020-10-14 17:49:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:12,784 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-10-14 17:49:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 17:49:12,785 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-14 17:49:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:12,786 INFO L225 Difference]: With dead ends: 132 [2020-10-14 17:49:12,786 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 17:49:12,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 17:49:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 17:49:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 17:49:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 17:49:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-14 17:49:12,792 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 102 [2020-10-14 17:49:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:12,792 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-14 17:49:12,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 17:49:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-14 17:49:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 17:49:12,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:12,794 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:12,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 17:49:12,794 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash -392017988, now seen corresponding path program 44 times [2020-10-14 17:49:12,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:12,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943674393] [2020-10-14 17:49:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:12,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:16,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3721 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 17:49:16,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:17,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:17,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:17,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:17,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:17,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:17,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943674393] [2020-10-14 17:49:17,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:17,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 17:49:17,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088852149] [2020-10-14 17:49:17,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 17:49:17,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 17:49:17,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 17:49:17,712 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 48 states. [2020-10-14 17:49:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:17,952 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2020-10-14 17:49:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 17:49:17,953 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-14 17:49:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:17,954 INFO L225 Difference]: With dead ends: 134 [2020-10-14 17:49:17,954 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 17:49:17,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 17:49:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 17:49:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-14 17:49:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 17:49:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2020-10-14 17:49:17,960 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 104 [2020-10-14 17:49:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:17,960 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2020-10-14 17:49:17,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 17:49:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2020-10-14 17:49:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 17:49:17,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:17,961 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:17,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 17:49:17,961 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash 970366686, now seen corresponding path program 45 times [2020-10-14 17:49:17,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:17,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538566828] [2020-10-14 17:49:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:17,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:22,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4068 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 17:49:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:23,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:23,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:23,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:23,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:23,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:23,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538566828] [2020-10-14 17:49:23,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:23,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 17:49:23,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4448373] [2020-10-14 17:49:23,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 17:49:23,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 17:49:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:49:23,290 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand 49 states. [2020-10-14 17:49:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:23,670 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-14 17:49:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 17:49:23,671 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-14 17:49:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:23,672 INFO L225 Difference]: With dead ends: 136 [2020-10-14 17:49:23,672 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 17:49:23,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:49:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 17:49:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 17:49:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 17:49:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2020-10-14 17:49:23,678 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 106 [2020-10-14 17:49:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:23,678 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2020-10-14 17:49:23,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 17:49:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2020-10-14 17:49:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 17:49:23,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:23,679 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:23,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 17:49:23,679 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 257013120, now seen corresponding path program 46 times [2020-10-14 17:49:23,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:23,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336124153] [2020-10-14 17:49:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:23,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:27,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:27,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4132 [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 17:49:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:29,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:29,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:29,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:29,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:29,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:29,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:29,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:29,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:29,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:29,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:29,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:29,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336124153] [2020-10-14 17:49:29,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:29,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 17:49:29,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875349846] [2020-10-14 17:49:29,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 17:49:29,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 17:49:29,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 17:49:29,098 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand 50 states. [2020-10-14 17:49:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:29,401 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2020-10-14 17:49:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 17:49:29,402 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-14 17:49:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:29,403 INFO L225 Difference]: With dead ends: 138 [2020-10-14 17:49:29,403 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 17:49:29,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 17:49:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 17:49:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-14 17:49:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 17:49:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2020-10-14 17:49:29,409 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 108 [2020-10-14 17:49:29,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:29,409 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2020-10-14 17:49:29,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 17:49:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2020-10-14 17:49:29,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 17:49:29,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:29,411 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:29,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 17:49:29,411 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1919003554, now seen corresponding path program 47 times [2020-10-14 17:49:29,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:29,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491424727] [2020-10-14 17:49:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:29,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:29,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:34,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:34,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 17:49:34,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:34,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4618 [2020-10-14 17:49:34,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:34,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:34,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 17:49:34,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:34,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 17:49:34,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:35,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:35,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:35,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:35,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491424727] [2020-10-14 17:49:35,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:35,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 17:49:35,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138851518] [2020-10-14 17:49:35,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 17:49:35,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 17:49:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:49:35,297 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand 51 states. [2020-10-14 17:49:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:35,538 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-14 17:49:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 17:49:35,538 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-14 17:49:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:35,539 INFO L225 Difference]: With dead ends: 140 [2020-10-14 17:49:35,540 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 17:49:35,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:49:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 17:49:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 17:49:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 17:49:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-14 17:49:35,546 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 110 [2020-10-14 17:49:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:35,546 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-14 17:49:35,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 17:49:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-14 17:49:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 17:49:35,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:35,547 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:35,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 17:49:35,548 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1363976516, now seen corresponding path program 48 times [2020-10-14 17:49:35,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:35,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729689667] [2020-10-14 17:49:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:35,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:40,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:40,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 17:49:40,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:40,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4704 [2020-10-14 17:49:40,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:40,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:40,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 17:49:40,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:40,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 17:49:40,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:41,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:41,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:41,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:41,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:41,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:41,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:41,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:41,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:41,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:41,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:41,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:41,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729689667] [2020-10-14 17:49:41,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:41,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 17:49:41,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377093182] [2020-10-14 17:49:41,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 17:49:41,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 17:49:41,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 17:49:41,599 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 52 states. [2020-10-14 17:49:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:41,996 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2020-10-14 17:49:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 17:49:41,997 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-14 17:49:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:41,998 INFO L225 Difference]: With dead ends: 142 [2020-10-14 17:49:41,998 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 17:49:41,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 17:49:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 17:49:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-14 17:49:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 17:49:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2020-10-14 17:49:42,004 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 112 [2020-10-14 17:49:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:42,004 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2020-10-14 17:49:42,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 17:49:42,004 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2020-10-14 17:49:42,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 17:49:42,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:42,005 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:42,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 17:49:42,006 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash 558937702, now seen corresponding path program 49 times [2020-10-14 17:49:42,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:42,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229204155] [2020-10-14 17:49:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:42,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:47,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:47,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 17:49:47,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:47,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:49:47,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:47,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:47,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 17:49:47,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:47,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 17:49:47,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:48,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:48,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:48,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:48,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:48,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:48,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:48,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:48,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229204155] [2020-10-14 17:49:48,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:48,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 17:49:48,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272315893] [2020-10-14 17:49:48,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 17:49:48,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 17:49:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:49:48,508 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 53 states. [2020-10-14 17:49:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:48,727 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2020-10-14 17:49:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 17:49:48,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-14 17:49:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:48,730 INFO L225 Difference]: With dead ends: 144 [2020-10-14 17:49:48,730 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 17:49:48,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:49:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 17:49:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-14 17:49:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 17:49:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2020-10-14 17:49:48,739 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 114 [2020-10-14 17:49:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:48,740 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2020-10-14 17:49:48,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 17:49:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2020-10-14 17:49:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 17:49:48,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:48,742 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:48,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 17:49:48,742 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash 10750728, now seen corresponding path program 50 times [2020-10-14 17:49:48,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:48,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937971155] [2020-10-14 17:49:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:48,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:53,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:53,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 17:49:53,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:49:53,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:49:53,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:53,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 17:49:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:49:53,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 17:49:53,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:55,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:49:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:55,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:49:55,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:49:55,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:49:55,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:49:55,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:49:55,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:49:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:49:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:49:55,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:49:55,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:49:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:49:55,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937971155] [2020-10-14 17:49:55,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:49:55,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 17:49:55,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642998416] [2020-10-14 17:49:55,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 17:49:55,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:49:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 17:49:55,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 17:49:55,289 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 54 states. [2020-10-14 17:49:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:49:55,707 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2020-10-14 17:49:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 17:49:55,708 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-14 17:49:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:49:55,711 INFO L225 Difference]: With dead ends: 146 [2020-10-14 17:49:55,712 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 17:49:55,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 17:49:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 17:49:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-14 17:49:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 17:49:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-10-14 17:49:55,717 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 116 [2020-10-14 17:49:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:49:55,717 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-10-14 17:49:55,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 17:49:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-10-14 17:49:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 17:49:55,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:49:55,718 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:49:55,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 17:49:55,719 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:49:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:49:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1484046122, now seen corresponding path program 51 times [2020-10-14 17:49:55,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:49:55,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187014465] [2020-10-14 17:49:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:49:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:49:55,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:49:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:00,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:00,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 17:50:00,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:00,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 17:50:00,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:00,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 17:50:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 17:50:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:02,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:02,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:02,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:02,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:02,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:02,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:02,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:02,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:02,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:02,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:02,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:02,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:02,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187014465] [2020-10-14 17:50:02,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:02,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 17:50:02,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955388151] [2020-10-14 17:50:02,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 17:50:02,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:02,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 17:50:02,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 17:50:02,349 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 55 states. [2020-10-14 17:50:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:02,641 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2020-10-14 17:50:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 17:50:02,642 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-14 17:50:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:02,643 INFO L225 Difference]: With dead ends: 148 [2020-10-14 17:50:02,643 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 17:50:02,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 17:50:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 17:50:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-14 17:50:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 17:50:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2020-10-14 17:50:02,649 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 118 [2020-10-14 17:50:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:02,650 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2020-10-14 17:50:02,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 17:50:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2020-10-14 17:50:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 17:50:02,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:02,651 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:02,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 17:50:02,651 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:02,651 INFO L82 PathProgramCache]: Analyzing trace with hash -18287924, now seen corresponding path program 52 times [2020-10-14 17:50:02,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:02,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922584957] [2020-10-14 17:50:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:02,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:07,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:07,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 17:50:07,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:07,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-14 17:50:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:07,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 17:50:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 17:50:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:09,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:09,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:09,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:09,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:09,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:09,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:09,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:09,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:09,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:09,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:09,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:09,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:09,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922584957] [2020-10-14 17:50:09,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:09,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 17:50:09,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216078138] [2020-10-14 17:50:09,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 17:50:09,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:09,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 17:50:09,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 17:50:09,325 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand 56 states. [2020-10-14 17:50:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:09,777 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2020-10-14 17:50:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 17:50:09,778 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-14 17:50:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:09,780 INFO L225 Difference]: With dead ends: 150 [2020-10-14 17:50:09,780 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 17:50:09,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 17:50:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 17:50:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-14 17:50:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 17:50:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-10-14 17:50:09,789 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 120 [2020-10-14 17:50:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:09,790 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-10-14 17:50:09,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 17:50:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-10-14 17:50:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 17:50:09,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:09,791 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:09,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 17:50:09,792 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash -652294674, now seen corresponding path program 53 times [2020-10-14 17:50:09,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:09,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029646208] [2020-10-14 17:50:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:09,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:14,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:14,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 17:50:14,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:14,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 17:50:14,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:14,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 17:50:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 17:50:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:16,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:16,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:16,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:16,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:16,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029646208] [2020-10-14 17:50:16,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:16,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 17:50:16,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966241281] [2020-10-14 17:50:16,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 17:50:16,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:16,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 17:50:16,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 17:50:16,505 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 57 states. [2020-10-14 17:50:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:16,935 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-10-14 17:50:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 17:50:16,936 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-14 17:50:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:16,937 INFO L225 Difference]: With dead ends: 152 [2020-10-14 17:50:16,937 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 17:50:16,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 17:50:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 17:50:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-14 17:50:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 17:50:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-14 17:50:16,942 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 122 [2020-10-14 17:50:16,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:16,943 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-14 17:50:16,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 17:50:16,943 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-14 17:50:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 17:50:16,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:16,944 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:16,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 17:50:16,944 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:16,945 INFO L82 PathProgramCache]: Analyzing trace with hash -47425392, now seen corresponding path program 54 times [2020-10-14 17:50:16,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:16,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407655008] [2020-10-14 17:50:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:16,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:21,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:21,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 17:50:21,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:21,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 17:50:21,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:21,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:21,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 17:50:21,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:21,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 17:50:21,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:50:23,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:23,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:23,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:23,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:23,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:23,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:23,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:23,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:23,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:23,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:23,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:23,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407655008] [2020-10-14 17:50:23,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:23,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 17:50:23,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957058713] [2020-10-14 17:50:23,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 17:50:23,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 17:50:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 17:50:23,679 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 58 states. [2020-10-14 17:50:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:24,033 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2020-10-14 17:50:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 17:50:24,033 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-14 17:50:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:24,035 INFO L225 Difference]: With dead ends: 154 [2020-10-14 17:50:24,035 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 17:50:24,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 17:50:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 17:50:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-14 17:50:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 17:50:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-10-14 17:50:24,040 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 124 [2020-10-14 17:50:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:24,040 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-10-14 17:50:24,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 17:50:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-10-14 17:50:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 17:50:24,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:24,041 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:24,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 17:50:24,041 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1411369650, now seen corresponding path program 55 times [2020-10-14 17:50:24,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:24,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929816636] [2020-10-14 17:50:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:24,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:26,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:29,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:29,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 17:50:29,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 17:50:29,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:29,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 17:50:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:29,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 17:50:29,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:30,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:30,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:30,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:30,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:30,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:30,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929816636] [2020-10-14 17:50:30,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:30,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 17:50:30,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593344593] [2020-10-14 17:50:30,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 17:50:30,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 17:50:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 17:50:30,918 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand 59 states. [2020-10-14 17:50:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:31,194 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2020-10-14 17:50:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 17:50:31,195 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-14 17:50:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:31,196 INFO L225 Difference]: With dead ends: 156 [2020-10-14 17:50:31,197 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 17:50:31,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 17:50:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 17:50:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-14 17:50:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 17:50:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2020-10-14 17:50:31,201 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 126 [2020-10-14 17:50:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:31,202 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2020-10-14 17:50:31,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 17:50:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2020-10-14 17:50:31,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 17:50:31,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:31,203 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:31,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 17:50:31,203 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:31,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1140900780, now seen corresponding path program 56 times [2020-10-14 17:50:31,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:31,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819039086] [2020-10-14 17:50:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:31,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:36,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:36,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 17:50:36,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:38,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:38,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:38,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:38,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:38,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819039086] [2020-10-14 17:50:38,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:38,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 17:50:38,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43488369] [2020-10-14 17:50:38,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 17:50:38,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 17:50:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 17:50:38,178 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 60 states. [2020-10-14 17:50:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:38,657 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2020-10-14 17:50:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 17:50:38,657 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-14 17:50:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:38,659 INFO L225 Difference]: With dead ends: 158 [2020-10-14 17:50:38,659 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 17:50:38,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 17:50:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 17:50:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-14 17:50:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 17:50:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2020-10-14 17:50:38,666 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 128 [2020-10-14 17:50:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:38,667 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2020-10-14 17:50:38,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 17:50:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2020-10-14 17:50:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 17:50:38,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:38,668 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:38,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 17:50:38,668 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1446457994, now seen corresponding path program 57 times [2020-10-14 17:50:38,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:38,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423433041] [2020-10-14 17:50:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:38,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:43,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 17:50:43,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:43,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:50:43,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:43,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 17:50:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 17:50:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:45,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:45,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:45,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:45,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423433041] [2020-10-14 17:50:45,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:45,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 17:50:45,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767310829] [2020-10-14 17:50:45,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 17:50:45,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:45,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 17:50:45,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 17:50:45,712 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 61 states. [2020-10-14 17:50:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:46,180 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-10-14 17:50:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 17:50:46,180 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 130 [2020-10-14 17:50:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:46,182 INFO L225 Difference]: With dead ends: 160 [2020-10-14 17:50:46,182 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 17:50:46,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 17:50:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 17:50:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-14 17:50:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 17:50:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-10-14 17:50:46,187 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 130 [2020-10-14 17:50:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:46,187 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-10-14 17:50:46,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 17:50:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-10-14 17:50:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 17:50:46,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:46,188 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:46,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 17:50:46,189 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1265802776, now seen corresponding path program 58 times [2020-10-14 17:50:46,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:46,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728449676] [2020-10-14 17:50:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:46,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:46,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:51,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-14 17:50:51,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:53,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:50:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:53,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:53,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:50:53,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:50:53,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:50:53,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:53,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:50:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:50:53,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:50:53,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:50:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:50:53,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728449676] [2020-10-14 17:50:53,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:50:53,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 17:50:53,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296753972] [2020-10-14 17:50:53,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 17:50:53,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:50:53,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 17:50:53,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 17:50:53,266 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 62 states. [2020-10-14 17:50:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:50:53,752 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2020-10-14 17:50:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 17:50:53,752 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 132 [2020-10-14 17:50:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:50:53,754 INFO L225 Difference]: With dead ends: 162 [2020-10-14 17:50:53,754 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 17:50:53,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 17:50:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 17:50:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-14 17:50:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 17:50:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-10-14 17:50:53,758 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 132 [2020-10-14 17:50:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:50:53,758 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-10-14 17:50:53,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 17:50:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-10-14 17:50:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 17:50:53,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:50:53,759 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:50:53,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 17:50:53,759 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:50:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:50:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash 703254074, now seen corresponding path program 59 times [2020-10-14 17:50:53,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:50:53,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917399329] [2020-10-14 17:50:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:50:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:50:53,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:53,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:50:58,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:50:58,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 17:50:58,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:00,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:00,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:00,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:00,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:00,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:00,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:00,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:00,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:00,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:00,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917399329] [2020-10-14 17:51:00,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:00,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 17:51:00,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813946942] [2020-10-14 17:51:00,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 17:51:00,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 17:51:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 17:51:00,901 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 63 states. [2020-10-14 17:51:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:01,411 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2020-10-14 17:51:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 17:51:01,411 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 134 [2020-10-14 17:51:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:01,412 INFO L225 Difference]: With dead ends: 164 [2020-10-14 17:51:01,412 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 17:51:01,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 17:51:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 17:51:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-14 17:51:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 17:51:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2020-10-14 17:51:01,417 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 134 [2020-10-14 17:51:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:01,417 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2020-10-14 17:51:01,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-14 17:51:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2020-10-14 17:51:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 17:51:01,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:01,418 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:01,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 17:51:01,419 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1259830748, now seen corresponding path program 60 times [2020-10-14 17:51:01,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:01,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349463599] [2020-10-14 17:51:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:06,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:06,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 17:51:06,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:06,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 17:51:06,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:06,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:06,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 17:51:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 17:51:06,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:08,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:08,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:08,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:08,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:08,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:08,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:08,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:08,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:08,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:08,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:08,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:08,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:08,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349463599] [2020-10-14 17:51:08,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:08,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-14 17:51:08,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531669] [2020-10-14 17:51:08,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-14 17:51:08,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:08,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-14 17:51:08,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 17:51:08,584 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand 64 states. [2020-10-14 17:51:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:08,861 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2020-10-14 17:51:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 17:51:08,862 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 136 [2020-10-14 17:51:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:08,863 INFO L225 Difference]: With dead ends: 166 [2020-10-14 17:51:08,863 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 17:51:08,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 17:51:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 17:51:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-14 17:51:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 17:51:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2020-10-14 17:51:08,868 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 136 [2020-10-14 17:51:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:08,869 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2020-10-14 17:51:08,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-14 17:51:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2020-10-14 17:51:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 17:51:08,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:08,869 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:08,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 17:51:08,870 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -740897538, now seen corresponding path program 61 times [2020-10-14 17:51:08,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:08,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920093154] [2020-10-14 17:51:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:08,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:13,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:13,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 17:51:13,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:13,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-14 17:51:13,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:13,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-14 17:51:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:13,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 17:51:13,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:16,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:16,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:16,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:16,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:16,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:16,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:16,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:16,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:16,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:16,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920093154] [2020-10-14 17:51:16,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:16,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-14 17:51:16,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342777685] [2020-10-14 17:51:16,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-14 17:51:16,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:16,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-14 17:51:16,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 17:51:16,223 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand 65 states. [2020-10-14 17:51:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:16,575 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2020-10-14 17:51:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 17:51:16,575 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 138 [2020-10-14 17:51:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:16,576 INFO L225 Difference]: With dead ends: 168 [2020-10-14 17:51:16,576 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 17:51:16,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 17:51:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 17:51:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-14 17:51:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 17:51:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2020-10-14 17:51:16,581 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 138 [2020-10-14 17:51:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:16,581 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2020-10-14 17:51:16,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-14 17:51:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2020-10-14 17:51:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 17:51:16,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:16,584 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:16,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 17:51:16,584 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash 704568224, now seen corresponding path program 62 times [2020-10-14 17:51:16,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:16,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385654709] [2020-10-14 17:51:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:16,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:16,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:21,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-14 17:51:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:23,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:23,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:23,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:23,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:23,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:23,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:23,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:23,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:23,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385654709] [2020-10-14 17:51:23,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:23,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 17:51:23,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724007144] [2020-10-14 17:51:23,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 17:51:23,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 17:51:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 17:51:23,999 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand 66 states. [2020-10-14 17:51:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:24,471 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2020-10-14 17:51:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-14 17:51:24,472 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 140 [2020-10-14 17:51:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:24,474 INFO L225 Difference]: With dead ends: 170 [2020-10-14 17:51:24,474 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 17:51:24,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 17:51:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 17:51:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-14 17:51:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 17:51:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2020-10-14 17:51:24,479 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 140 [2020-10-14 17:51:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:24,479 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2020-10-14 17:51:24,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-14 17:51:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2020-10-14 17:51:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 17:51:24,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:24,480 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:24,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 17:51:24,481 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1772238398, now seen corresponding path program 63 times [2020-10-14 17:51:24,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:24,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7412591] [2020-10-14 17:51:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:24,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:24,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:29,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:29,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 17:51:29,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:29,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 17:51:29,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:29,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-14 17:51:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-14 17:51:29,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:31,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:31,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:31,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:31,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:31,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:31,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:51:31,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:31,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:31,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:51:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:31,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7412591] [2020-10-14 17:51:31,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:31,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-14 17:51:31,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533687734] [2020-10-14 17:51:31,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-14 17:51:31,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-14 17:51:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 17:51:31,929 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand 67 states. [2020-10-14 17:51:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:32,463 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2020-10-14 17:51:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-14 17:51:32,463 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 142 [2020-10-14 17:51:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:32,465 INFO L225 Difference]: With dead ends: 172 [2020-10-14 17:51:32,465 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 17:51:32,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 17:51:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 17:51:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-14 17:51:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 17:51:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2020-10-14 17:51:32,469 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 142 [2020-10-14 17:51:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:32,469 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2020-10-14 17:51:32,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-14 17:51:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2020-10-14 17:51:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 17:51:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:32,470 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:32,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 17:51:32,470 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1723447140, now seen corresponding path program 64 times [2020-10-14 17:51:32,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:32,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496198549] [2020-10-14 17:51:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:32,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:37,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:37,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 17:51:37,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 17:51:37,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-14 17:51:37,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:37,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-14 17:51:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 17:51:37,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0