/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:31:18,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:31:18,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:31:18,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:31:18,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:31:18,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:31:18,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:31:18,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:31:18,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:31:18,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:31:18,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:31:18,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:31:18,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:31:18,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:31:18,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:31:18,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:31:18,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:31:18,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:31:18,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:31:18,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:31:18,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:31:18,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:31:18,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:31:18,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:31:18,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:31:18,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:31:18,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:31:18,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:31:18,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:31:18,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:31:18,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:31:18,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:31:18,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:31:18,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:31:18,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:31:18,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:31:18,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:31:18,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:31:18,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:31:18,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:31:18,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:31:18,538 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 [2020-10-13 23:31:18,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:31:18,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:31:18,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:31:18,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:31:18,590 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:31:18,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:31:18,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:31:18,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:31:18,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:31:18,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:31:18,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:31:18,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:31:18,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:31:18,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:31:18,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:31:18,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:31:18,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:31:18,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:31:18,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:31:18,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:31:18,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:31:18,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:31:18,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:31:18,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:31:18,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:31:18,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:31:18,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:31:18,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:31:18,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:31:18,597 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:31:18,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:31:18,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:31:18,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:31:18,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:31:18,906 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:31:18,907 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-13 23:31:18,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f74cfe316/af8fef56f7ea4dc98338ca28b78fad73/FLAGd8e00af51 [2020-10-13 23:31:19,416 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:31:19,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-13 23:31:19,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f74cfe316/af8fef56f7ea4dc98338ca28b78fad73/FLAGd8e00af51 [2020-10-13 23:31:19,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f74cfe316/af8fef56f7ea4dc98338ca28b78fad73 [2020-10-13 23:31:19,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:31:19,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:31:19,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:31:19,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:31:19,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:31:19,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:31:19" (1/1) ... [2020-10-13 23:31:19,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eef8159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:19, skipping insertion in model container [2020-10-13 23:31:19,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:31:19" (1/1) ... [2020-10-13 23:31:19,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:31:19,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:31:20,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:31:20,013 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:31:20,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:31:20,058 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:31:20,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20 WrapperNode [2020-10-13 23:31:20,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:31:20,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:31:20,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:31:20,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:31:20,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (1/1) ... [2020-10-13 23:31:20,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (1/1) ... [2020-10-13 23:31:20,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (1/1) ... [2020-10-13 23:31:20,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (1/1) ... [2020-10-13 23:31:20,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (1/1) ... [2020-10-13 23:31:20,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (1/1) ... [2020-10-13 23:31:20,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (1/1) ... [2020-10-13 23:31:20,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:31:20,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:31:20,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:31:20,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:31:20,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (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 [2020-10-13 23:31:20,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:31:20,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:31:20,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:31:20,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:31:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:31:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:31:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:31:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:31:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:31:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:31:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:31:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:31:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:31:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:31:20,741 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:31:20,741 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-13 23:31:20,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:31:20 BoogieIcfgContainer [2020-10-13 23:31:20,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:31:20,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:31:20,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:31:20,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:31:20,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:31:19" (1/3) ... [2020-10-13 23:31:20,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78904b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:31:20, skipping insertion in model container [2020-10-13 23:31:20,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:31:20" (2/3) ... [2020-10-13 23:31:20,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78904b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:31:20, skipping insertion in model container [2020-10-13 23:31:20,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:31:20" (3/3) ... [2020-10-13 23:31:20,754 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2020-10-13 23:31:20,763 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:31:20,770 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:31:20,784 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:31:20,803 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:31:20,803 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:31:20,804 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:31:20,804 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:31:20,804 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:31:20,804 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:31:20,804 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:31:20,804 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:31:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-13 23:31:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:31:20,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:20,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:20,831 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2020-10-13 23:31:20,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:20,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570595493] [2020-10-13 23:31:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:21,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:24,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:31:24,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:31:24,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3311 [2020-10-13 23:31:24,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:24,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:31:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:24,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:31:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:24,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:24,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:24,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:24,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:31:24,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:24,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:24,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:24,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:24,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:24,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:31:24,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570595493] [2020-10-13 23:31:24,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:31:24,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:31:24,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159730545] [2020-10-13 23:31:24,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:31:24,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:31:24,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:31:24,413 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-10-13 23:31:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:24,616 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2020-10-13 23:31:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:31:24,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-13 23:31:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:24,626 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:31:24,627 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:31:24,630 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 [2020-10-13 23:31:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:31:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 23:31:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:31:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-10-13 23:31:24,675 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2020-10-13 23:31:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:24,675 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-10-13 23:31:24,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:31:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-10-13 23:31:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:31:24,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:24,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:24,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:31:24,678 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1311438022, now seen corresponding path program 1 times [2020-10-13 23:31:24,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:24,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504447879] [2020-10-13 23:31:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:29,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:29,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:31:29,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:31:29,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:31:29,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:29,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:29,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:31:29,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:31:29,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:31:29,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:29,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:29,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:29,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:29,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:29,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:31:29,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:29,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:29,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:31:29,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504447879] [2020-10-13 23:31:29,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:31:29,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:31:29,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804254988] [2020-10-13 23:31:29,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:31:29,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:31:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:31:29,762 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 4 states. [2020-10-13 23:31:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:29,981 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2020-10-13 23:31:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:31:29,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-13 23:31:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:29,984 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:31:29,984 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:31:29,985 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 [2020-10-13 23:31:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:31:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-13 23:31:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:31:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-13 23:31:29,995 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 31 [2020-10-13 23:31:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:29,995 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-13 23:31:29,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:31:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-13 23:31:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:31:29,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:29,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:29,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:31:29,998 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:29,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1898370412, now seen corresponding path program 1 times [2020-10-13 23:31:29,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:29,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165622431] [2020-10-13 23:31:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:30,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:35,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:31:35,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:31:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:31:35,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:35,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:31:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:31:35,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:35,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:35,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:35,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:35,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:35,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:35,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:35,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:35,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:35,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:35,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:35,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:31:35,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165622431] [2020-10-13 23:31:35,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:31:35,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:31:35,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148189080] [2020-10-13 23:31:35,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:31:35,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:31:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:31:35,074 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 4 states. [2020-10-13 23:31:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:35,202 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-13 23:31:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:31:35,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-13 23:31:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:35,204 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:31:35,204 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:31:35,205 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 [2020-10-13 23:31:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:31:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 23:31:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:31:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-13 23:31:35,218 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 49 [2020-10-13 23:31:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:35,218 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-13 23:31:35,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:31:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-13 23:31:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:31:35,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:35,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:35,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:31:35,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash -753251022, now seen corresponding path program 1 times [2020-10-13 23:31:35,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:35,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804095946] [2020-10-13 23:31:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:35,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:40,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:31:40,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:31:40,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:31:40,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:40,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:31:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:40,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:40,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:40,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:40,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:40,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:40,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:40,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:40,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:40,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:40,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:40,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:40,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:31:40,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804095946] [2020-10-13 23:31:40,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:40,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:40,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791718587] [2020-10-13 23:31:40,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:40,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:40,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:40,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:40,290 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 5 states. [2020-10-13 23:31:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:40,490 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2020-10-13 23:31:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:40,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-13 23:31:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:40,491 INFO L225 Difference]: With dead ends: 126 [2020-10-13 23:31:40,492 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:31:40,492 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 [2020-10-13 23:31:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:31:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-10-13 23:31:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:31:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-13 23:31:40,501 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 51 [2020-10-13 23:31:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:40,502 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-13 23:31:40,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-13 23:31:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:31:40,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:40,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:40,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:31:40,504 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1902395392, now seen corresponding path program 2 times [2020-10-13 23:31:40,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:40,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112560486] [2020-10-13 23:31:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:40,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:44,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:45,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:31:45,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:31:45,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:31:45,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:45,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:45,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:31:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:45,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:45,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:45,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:45,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:45,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:45,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:45,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:45,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:45,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:45,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-13 23:31:45,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112560486] [2020-10-13 23:31:45,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:45,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:45,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572377786] [2020-10-13 23:31:45,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:45,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:45,596 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 6 states. [2020-10-13 23:31:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:45,863 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2020-10-13 23:31:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:45,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-13 23:31:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:45,865 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:31:45,865 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:31:45,867 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 [2020-10-13 23:31:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:31:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-10-13 23:31:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:31:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2020-10-13 23:31:45,883 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 69 [2020-10-13 23:31:45,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:45,886 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2020-10-13 23:31:45,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2020-10-13 23:31:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:31:45,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:45,888 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:45,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:31:45,888 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:45,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2101402446, now seen corresponding path program 3 times [2020-10-13 23:31:45,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:45,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255611405] [2020-10-13 23:31:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:45,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:50,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:50,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:31:50,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:31:50,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:31:50,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:50,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:50,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:50,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:50,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:50,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:50,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:50,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:50,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:50,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:50,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:31:50,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:50,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:50,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:31:50,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255611405] [2020-10-13 23:31:50,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:50,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:50,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812614879] [2020-10-13 23:31:50,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:50,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:50,994 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 5 states. [2020-10-13 23:31:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:51,105 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2020-10-13 23:31:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:51,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-13 23:31:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:51,107 INFO L225 Difference]: With dead ends: 178 [2020-10-13 23:31:51,107 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:31:51,108 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 [2020-10-13 23:31:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:31:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 23:31:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:31:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-13 23:31:51,116 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 87 [2020-10-13 23:31:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:51,116 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-13 23:31:51,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-13 23:31:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:31:51,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:51,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:51,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:31:51,119 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1204742292, now seen corresponding path program 4 times [2020-10-13 23:31:51,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:51,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734905964] [2020-10-13 23:31:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:56,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:31:56,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:31:56,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:31:56,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:56,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:31:56,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:56,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:56,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:56,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:56,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:56,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:56,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:31:56,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:56,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:56,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:56,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-13 23:31:56,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734905964] [2020-10-13 23:31:56,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:56,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:56,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107411964] [2020-10-13 23:31:56,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:56,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:56,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:56,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:56,212 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 7 states. [2020-10-13 23:31:56,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:56,472 INFO L93 Difference]: Finished difference Result 196 states and 223 transitions. [2020-10-13 23:31:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:56,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-10-13 23:31:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:56,473 INFO L225 Difference]: With dead ends: 196 [2020-10-13 23:31:56,473 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:31:56,477 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 [2020-10-13 23:31:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:31:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2020-10-13 23:31:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:31:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-10-13 23:31:56,491 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 89 [2020-10-13 23:31:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:56,491 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-10-13 23:31:56,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-10-13 23:31:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:31:56,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:56,499 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:56,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:31:56,500 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1345867846, now seen corresponding path program 5 times [2020-10-13 23:31:56,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:56,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708907081] [2020-10-13 23:31:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:32:01,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:32:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:32:01,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:01,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:32:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:32:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:01,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:01,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:01,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:01,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:01,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:01,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:01,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:01,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:01,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:01,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:01,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:01,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:32:01,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708907081] [2020-10-13 23:32:01,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:01,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:32:01,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874427061] [2020-10-13 23:32:01,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:32:01,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:32:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:32:01,577 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 6 states. [2020-10-13 23:32:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:01,718 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2020-10-13 23:32:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:32:01,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-13 23:32:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:01,720 INFO L225 Difference]: With dead ends: 216 [2020-10-13 23:32:01,721 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:32:01,722 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 [2020-10-13 23:32:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:32:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-13 23:32:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:32:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-10-13 23:32:01,729 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 107 [2020-10-13 23:32:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:01,729 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-10-13 23:32:01,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:32:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-10-13 23:32:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 23:32:01,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:01,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:01,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:32:01,731 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1714335960, now seen corresponding path program 6 times [2020-10-13 23:32:01,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:01,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090102278] [2020-10-13 23:32:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:01,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:01,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:01,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:06,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:06,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:32:06,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:06,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:06,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:06,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:06,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:06,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:06,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:06,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:06,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:06,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:06,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:32:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-13 23:32:06,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090102278] [2020-10-13 23:32:06,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:06,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:32:06,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312363561] [2020-10-13 23:32:06,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:32:06,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:32:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:32:06,846 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 8 states. [2020-10-13 23:32:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:07,198 INFO L93 Difference]: Finished difference Result 232 states and 259 transitions. [2020-10-13 23:32:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:32:07,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-10-13 23:32:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:07,200 INFO L225 Difference]: With dead ends: 232 [2020-10-13 23:32:07,200 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 23:32:07,201 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 [2020-10-13 23:32:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 23:32:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2020-10-13 23:32:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 23:32:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-13 23:32:07,208 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 109 [2020-10-13 23:32:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:07,208 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-13 23:32:07,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:32:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-13 23:32:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 23:32:07,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:07,210 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:07,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:32:07,210 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:07,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1677539802, now seen corresponding path program 7 times [2020-10-13 23:32:07,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:07,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993768540] [2020-10-13 23:32:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:07,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:07,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:07,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:07,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:12,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:12,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 23:32:12,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:32:12,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:32:12,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:12,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:12,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:32:12,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:32:12,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:32:12,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:12,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:12,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:12,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:12,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:12,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:12,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:12,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:12,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-10-13 23:32:12,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993768540] [2020-10-13 23:32:12,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:12,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:32:12,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786512008] [2020-10-13 23:32:12,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:32:12,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:32:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:32:12,309 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 9 states. [2020-10-13 23:32:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:12,673 INFO L93 Difference]: Finished difference Result 266 states and 293 transitions. [2020-10-13 23:32:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:32:12,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2020-10-13 23:32:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:12,675 INFO L225 Difference]: With dead ends: 266 [2020-10-13 23:32:12,675 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:32:12,675 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 [2020-10-13 23:32:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:32:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 150. [2020-10-13 23:32:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 23:32:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2020-10-13 23:32:12,683 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 127 [2020-10-13 23:32:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:12,684 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2020-10-13 23:32:12,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:32:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2020-10-13 23:32:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 23:32:12,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:12,686 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:12,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:32:12,687 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:12,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2006588428, now seen corresponding path program 8 times [2020-10-13 23:32:12,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:12,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742956774] [2020-10-13 23:32:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:12,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:12,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:12,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:17,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:32:17,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:17,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:17,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:17,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:17,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:17,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:17,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:17,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:17,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:17,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:17,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:17,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:17,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 23:32:17,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742956774] [2020-10-13 23:32:17,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:17,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:32:17,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010333235] [2020-10-13 23:32:17,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:32:17,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:32:17,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:32:17,825 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand 7 states. [2020-10-13 23:32:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:17,950 INFO L93 Difference]: Finished difference Result 290 states and 310 transitions. [2020-10-13 23:32:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:32:17,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-13 23:32:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:17,954 INFO L225 Difference]: With dead ends: 290 [2020-10-13 23:32:17,954 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 23:32:17,955 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 [2020-10-13 23:32:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 23:32:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-13 23:32:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 23:32:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2020-10-13 23:32:17,965 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 145 [2020-10-13 23:32:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:17,966 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2020-10-13 23:32:17,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:32:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2020-10-13 23:32:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:32:17,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:17,967 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:17,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:32:17,967 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash -928964974, now seen corresponding path program 9 times [2020-10-13 23:32:17,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:17,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488657653] [2020-10-13 23:32:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:17,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:23,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:23,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:32:23,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:23,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-13 23:32:23,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:23,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:23,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:23,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:32:23,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:23,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:23,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:23,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:23,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:23,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:23,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:23,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:23,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:23,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:23,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-10-13 23:32:23,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488657653] [2020-10-13 23:32:23,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:23,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:23,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723820491] [2020-10-13 23:32:23,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:23,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:23,125 INFO L87 Difference]: Start difference. First operand 152 states and 162 transitions. Second operand 10 states. [2020-10-13 23:32:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:23,607 INFO L93 Difference]: Finished difference Result 302 states and 329 transitions. [2020-10-13 23:32:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:23,607 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 147 [2020-10-13 23:32:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:23,609 INFO L225 Difference]: With dead ends: 302 [2020-10-13 23:32:23,609 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 23:32:23,610 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 [2020-10-13 23:32:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 23:32:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 170. [2020-10-13 23:32:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 23:32:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 180 transitions. [2020-10-13 23:32:23,627 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 180 transitions. Word has length 147 [2020-10-13 23:32:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:23,627 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 180 transitions. [2020-10-13 23:32:23,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 180 transitions. [2020-10-13 23:32:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 23:32:23,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:23,629 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:23,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:32:23,630 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:23,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1192229216, now seen corresponding path program 10 times [2020-10-13 23:32:23,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:23,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917173729] [2020-10-13 23:32:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:23,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:23,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:23,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:23,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:23,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:28,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:28,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:32:28,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:28,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:32:28,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:28,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:32:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:32:28,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:28,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:28,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:28,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:28,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:28,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:28,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:28,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:28,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:28,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:28,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:28,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:32:28,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917173729] [2020-10-13 23:32:28,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:28,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:32:28,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510548940] [2020-10-13 23:32:28,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:32:28,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:32:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:32:28,732 INFO L87 Difference]: Start difference. First operand 170 states and 180 transitions. Second operand 8 states. [2020-10-13 23:32:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:28,879 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2020-10-13 23:32:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:32:28,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2020-10-13 23:32:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:28,881 INFO L225 Difference]: With dead ends: 328 [2020-10-13 23:32:28,881 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 23:32:28,882 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 [2020-10-13 23:32:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 23:32:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-10-13 23:32:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:32:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 182 transitions. [2020-10-13 23:32:28,891 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 182 transitions. Word has length 165 [2020-10-13 23:32:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:28,891 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 182 transitions. [2020-10-13 23:32:28,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:32:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 182 transitions. [2020-10-13 23:32:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:32:28,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:28,894 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:28,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:32:28,894 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:28,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1982744322, now seen corresponding path program 11 times [2020-10-13 23:32:28,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:28,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388755495] [2020-10-13 23:32:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:28,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:28,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:28,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:28,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:29,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:33,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:33,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:32:33,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:32:33,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:33,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:32:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:32:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:32:33,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:34,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:34,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:34,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:34,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:34,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:34,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:34,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-13 23:32:34,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388755495] [2020-10-13 23:32:34,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:34,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:32:34,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675588460] [2020-10-13 23:32:34,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:32:34,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:34,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:32:34,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:34,039 INFO L87 Difference]: Start difference. First operand 172 states and 182 transitions. Second operand 11 states. [2020-10-13 23:32:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:34,512 INFO L93 Difference]: Finished difference Result 338 states and 365 transitions. [2020-10-13 23:32:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:32:34,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 167 [2020-10-13 23:32:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:34,515 INFO L225 Difference]: With dead ends: 338 [2020-10-13 23:32:34,515 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 23:32:34,516 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 [2020-10-13 23:32:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 23:32:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 190. [2020-10-13 23:32:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 23:32:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 200 transitions. [2020-10-13 23:32:34,523 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 200 transitions. Word has length 167 [2020-10-13 23:32:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:34,524 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 200 transitions. [2020-10-13 23:32:34,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:32:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 200 transitions. [2020-10-13 23:32:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 23:32:34,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:34,526 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:34,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:32:34,527 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1131401420, now seen corresponding path program 12 times [2020-10-13 23:32:34,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:34,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52779396] [2020-10-13 23:32:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:34,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:34,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:34,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:34,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:39,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 23:32:39,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:39,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:32:39,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:39,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:39,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:32:39,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:39,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:32:39,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:39,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:39,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:39,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:39,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:39,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:39,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:39,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 23:32:39,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52779396] [2020-10-13 23:32:39,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:39,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:32:39,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376781930] [2020-10-13 23:32:39,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:32:39,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:32:39,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:32:39,633 INFO L87 Difference]: Start difference. First operand 190 states and 200 transitions. Second operand 9 states. [2020-10-13 23:32:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:39,754 INFO L93 Difference]: Finished difference Result 366 states and 386 transitions. [2020-10-13 23:32:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:32:39,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 185 [2020-10-13 23:32:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:39,756 INFO L225 Difference]: With dead ends: 366 [2020-10-13 23:32:39,756 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 23:32:39,756 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 [2020-10-13 23:32:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 23:32:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-10-13 23:32:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 23:32:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 202 transitions. [2020-10-13 23:32:39,768 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 202 transitions. Word has length 185 [2020-10-13 23:32:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:39,768 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 202 transitions. [2020-10-13 23:32:39,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:32:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 202 transitions. [2020-10-13 23:32:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 23:32:39,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:39,771 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:39,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:32:39,771 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:39,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2126277270, now seen corresponding path program 13 times [2020-10-13 23:32:39,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:39,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045664252] [2020-10-13 23:32:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:32:44,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:44,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:44,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:44,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:44,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:44,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:44,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:44,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:44,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-10-13 23:32:44,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045664252] [2020-10-13 23:32:44,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:44,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:44,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415935662] [2020-10-13 23:32:44,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:44,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:44,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:44,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:44,942 INFO L87 Difference]: Start difference. First operand 192 states and 202 transitions. Second operand 12 states. [2020-10-13 23:32:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:45,448 INFO L93 Difference]: Finished difference Result 374 states and 401 transitions. [2020-10-13 23:32:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:45,449 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 187 [2020-10-13 23:32:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:45,451 INFO L225 Difference]: With dead ends: 374 [2020-10-13 23:32:45,451 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 23:32:45,452 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 [2020-10-13 23:32:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 23:32:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 210. [2020-10-13 23:32:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 23:32:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 220 transitions. [2020-10-13 23:32:45,460 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 220 transitions. Word has length 187 [2020-10-13 23:32:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:45,460 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 220 transitions. [2020-10-13 23:32:45,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 220 transitions. [2020-10-13 23:32:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-13 23:32:45,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:45,463 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:45,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:32:45,463 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:45,464 INFO L82 PathProgramCache]: Analyzing trace with hash 628386360, now seen corresponding path program 14 times [2020-10-13 23:32:45,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:45,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429062461] [2020-10-13 23:32:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:45,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:45,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:45,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:45,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:45,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:45,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:50,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:50,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-13 23:32:50,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:50,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 23:32:50,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:50,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:50,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:50,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 23:32:50,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:50,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:50,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:50,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:50,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:50,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:50,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:50,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:50,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:50,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:50,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-13 23:32:50,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429062461] [2020-10-13 23:32:50,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:50,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:50,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999984534] [2020-10-13 23:32:50,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:50,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:50,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:50,650 INFO L87 Difference]: Start difference. First operand 210 states and 220 transitions. Second operand 13 states. [2020-10-13 23:32:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:51,150 INFO L93 Difference]: Finished difference Result 408 states and 435 transitions. [2020-10-13 23:32:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:51,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 205 [2020-10-13 23:32:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:51,152 INFO L225 Difference]: With dead ends: 408 [2020-10-13 23:32:51,152 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 23:32:51,153 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 [2020-10-13 23:32:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 23:32:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 228. [2020-10-13 23:32:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 23:32:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 238 transitions. [2020-10-13 23:32:51,174 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 238 transitions. Word has length 205 [2020-10-13 23:32:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:51,175 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 238 transitions. [2020-10-13 23:32:51,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 238 transitions. [2020-10-13 23:32:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-13 23:32:51,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:51,179 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:51,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:32:51,179 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:51,180 INFO L82 PathProgramCache]: Analyzing trace with hash -283940986, now seen corresponding path program 15 times [2020-10-13 23:32:51,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:51,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717590427] [2020-10-13 23:32:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:51,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:51,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:51,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:51,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:56,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-13 23:32:56,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:56,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:32:56,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:56,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:56,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:56,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:56,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:56,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:56,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:56,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:56,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:56,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:56,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:56,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:56,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:56,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:32:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 23:32:56,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717590427] [2020-10-13 23:32:56,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:56,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:56,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387628748] [2020-10-13 23:32:56,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:56,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:56,332 INFO L87 Difference]: Start difference. First operand 228 states and 238 transitions. Second operand 10 states. [2020-10-13 23:32:56,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:56,463 INFO L93 Difference]: Finished difference Result 440 states and 460 transitions. [2020-10-13 23:32:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:56,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 223 [2020-10-13 23:32:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:56,466 INFO L225 Difference]: With dead ends: 440 [2020-10-13 23:32:56,466 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 23:32:56,467 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 [2020-10-13 23:32:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 23:32:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2020-10-13 23:32:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 23:32:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 240 transitions. [2020-10-13 23:32:56,477 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 240 transitions. Word has length 223 [2020-10-13 23:32:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:56,477 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 240 transitions. [2020-10-13 23:32:56,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 240 transitions. [2020-10-13 23:32:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 23:32:56,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:56,479 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:56,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:32:56,479 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash 42780068, now seen corresponding path program 16 times [2020-10-13 23:32:56,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:56,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897956411] [2020-10-13 23:32:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:56,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:01,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:01,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 23:33:01,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:01,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 23:33:01,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:01,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:33:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:33:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:33:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:01,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:01,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:01,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:01,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:01,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:01,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:01,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:01,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-10-13 23:33:01,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897956411] [2020-10-13 23:33:01,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:01,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:33:01,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232356575] [2020-10-13 23:33:01,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:33:01,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:33:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:01,706 INFO L87 Difference]: Start difference. First operand 230 states and 240 transitions. Second operand 14 states. [2020-10-13 23:33:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:02,292 INFO L93 Difference]: Finished difference Result 444 states and 471 transitions. [2020-10-13 23:33:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:33:02,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 225 [2020-10-13 23:33:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:02,294 INFO L225 Difference]: With dead ends: 444 [2020-10-13 23:33:02,294 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 23:33:02,299 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 [2020-10-13 23:33:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 23:33:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 248. [2020-10-13 23:33:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-13 23:33:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 258 transitions. [2020-10-13 23:33:02,310 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 258 transitions. Word has length 225 [2020-10-13 23:33:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:02,310 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 258 transitions. [2020-10-13 23:33:02,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:33:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 258 transitions. [2020-10-13 23:33:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 23:33:02,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:02,312 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:02,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:33:02,312 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1667448846, now seen corresponding path program 17 times [2020-10-13 23:33:02,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:02,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274262751] [2020-10-13 23:33:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:07,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-13 23:33:07,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 23:33:07,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:07,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:33:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:33:07,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:07,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:07,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:07,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:07,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:07,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:07,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-13 23:33:07,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274262751] [2020-10-13 23:33:07,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:07,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:33:07,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606915669] [2020-10-13 23:33:07,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:33:07,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:33:07,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:33:07,476 INFO L87 Difference]: Start difference. First operand 248 states and 258 transitions. Second operand 11 states. [2020-10-13 23:33:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:07,630 INFO L93 Difference]: Finished difference Result 478 states and 498 transitions. [2020-10-13 23:33:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:33:07,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 243 [2020-10-13 23:33:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:07,632 INFO L225 Difference]: With dead ends: 478 [2020-10-13 23:33:07,632 INFO L226 Difference]: Without dead ends: 251 [2020-10-13 23:33:07,633 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 [2020-10-13 23:33:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-13 23:33:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2020-10-13 23:33:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 23:33:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 260 transitions. [2020-10-13 23:33:07,645 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 260 transitions. Word has length 243 [2020-10-13 23:33:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:07,646 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 260 transitions. [2020-10-13 23:33:07,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:33:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 260 transitions. [2020-10-13 23:33:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 23:33:07,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:07,647 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:07,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:33:07,648 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash -576199920, now seen corresponding path program 18 times [2020-10-13 23:33:07,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:07,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032924472] [2020-10-13 23:33:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:07,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:12,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 23:33:12,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:12,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-13 23:33:12,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:12,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:12,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:33:12,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:33:12,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:33:12,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:12,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:12,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:12,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:12,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:33:12,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:12,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2020-10-13 23:33:12,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032924472] [2020-10-13 23:33:12,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:12,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:33:12,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896348051] [2020-10-13 23:33:12,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:33:12,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:33:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:12,928 INFO L87 Difference]: Start difference. First operand 250 states and 260 transitions. Second operand 15 states. [2020-10-13 23:33:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:13,582 INFO L93 Difference]: Finished difference Result 480 states and 507 transitions. [2020-10-13 23:33:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:33:13,582 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 245 [2020-10-13 23:33:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:13,584 INFO L225 Difference]: With dead ends: 480 [2020-10-13 23:33:13,584 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 23:33:13,585 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 [2020-10-13 23:33:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 23:33:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 268. [2020-10-13 23:33:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 23:33:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 278 transitions. [2020-10-13 23:33:13,594 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 278 transitions. Word has length 245 [2020-10-13 23:33:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:13,595 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 278 transitions. [2020-10-13 23:33:13,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:33:13,595 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 278 transitions. [2020-10-13 23:33:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 23:33:13,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:13,597 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:13,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:33:13,597 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1982618206, now seen corresponding path program 19 times [2020-10-13 23:33:13,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:13,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423982487] [2020-10-13 23:33:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:13,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:18,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:18,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 23:33:18,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5211 [2020-10-13 23:33:18,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:18,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:33:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:18,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:18,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:18,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:18,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:18,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:18,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:18,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:18,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:18,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2020-10-13 23:33:19,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423982487] [2020-10-13 23:33:19,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:19,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:19,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686364534] [2020-10-13 23:33:19,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:19,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:19,012 INFO L87 Difference]: Start difference. First operand 268 states and 278 transitions. Second operand 16 states. [2020-10-13 23:33:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:19,632 INFO L93 Difference]: Finished difference Result 514 states and 541 transitions. [2020-10-13 23:33:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:19,634 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 263 [2020-10-13 23:33:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:19,636 INFO L225 Difference]: With dead ends: 514 [2020-10-13 23:33:19,636 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 23:33:19,637 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 [2020-10-13 23:33:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 23:33:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2020-10-13 23:33:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 23:33:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 296 transitions. [2020-10-13 23:33:19,647 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 296 transitions. Word has length 263 [2020-10-13 23:33:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:19,647 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 296 transitions. [2020-10-13 23:33:19,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 296 transitions. [2020-10-13 23:33:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-13 23:33:19,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:19,649 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:19,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:33:19,649 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash -239379924, now seen corresponding path program 20 times [2020-10-13 23:33:19,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:19,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446075426] [2020-10-13 23:33:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:19,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:19,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:19,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:19,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:24,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:24,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-13 23:33:24,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:24,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5280 [2020-10-13 23:33:24,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:24,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:33:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:33:24,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:25,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:25,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:25,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:25,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:25,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:25,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:25,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-13 23:33:25,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446075426] [2020-10-13 23:33:25,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:25,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:33:25,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187632055] [2020-10-13 23:33:25,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:33:25,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:33:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:33:25,072 INFO L87 Difference]: Start difference. First operand 286 states and 296 transitions. Second operand 12 states. [2020-10-13 23:33:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:25,228 INFO L93 Difference]: Finished difference Result 552 states and 572 transitions. [2020-10-13 23:33:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:33:25,229 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 281 [2020-10-13 23:33:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:25,230 INFO L225 Difference]: With dead ends: 552 [2020-10-13 23:33:25,230 INFO L226 Difference]: Without dead ends: 289 [2020-10-13 23:33:25,232 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 [2020-10-13 23:33:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-13 23:33:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2020-10-13 23:33:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-13 23:33:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 298 transitions. [2020-10-13 23:33:25,241 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 298 transitions. Word has length 281 [2020-10-13 23:33:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:25,241 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 298 transitions. [2020-10-13 23:33:25,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:33:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 298 transitions. [2020-10-13 23:33:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-13 23:33:25,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:25,243 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:25,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:33:25,244 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1032767798, now seen corresponding path program 21 times [2020-10-13 23:33:25,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:25,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603998950] [2020-10-13 23:33:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:25,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:30,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:30,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-13 23:33:30,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:30,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5215 [2020-10-13 23:33:30,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:30,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:33:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:33:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:33:30,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:30,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:30,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:30,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:30,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:30,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:30,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:33:30,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:30,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:30,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2020-10-13 23:33:30,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603998950] [2020-10-13 23:33:30,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:30,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:33:30,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705647335] [2020-10-13 23:33:30,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:33:30,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:30,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:33:30,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:30,685 INFO L87 Difference]: Start difference. First operand 288 states and 298 transitions. Second operand 17 states. [2020-10-13 23:33:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:31,395 INFO L93 Difference]: Finished difference Result 550 states and 577 transitions. [2020-10-13 23:33:31,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:33:31,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 283 [2020-10-13 23:33:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:31,397 INFO L225 Difference]: With dead ends: 550 [2020-10-13 23:33:31,398 INFO L226 Difference]: Without dead ends: 315 [2020-10-13 23:33:31,398 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 [2020-10-13 23:33:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-13 23:33:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 306. [2020-10-13 23:33:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-13 23:33:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 316 transitions. [2020-10-13 23:33:31,416 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 316 transitions. Word has length 283 [2020-10-13 23:33:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:31,418 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 316 transitions. [2020-10-13 23:33:31,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:33:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 316 transitions. [2020-10-13 23:33:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-13 23:33:31,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:31,420 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:31,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:33:31,423 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1207766120, now seen corresponding path program 22 times [2020-10-13 23:33:31,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:31,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134248331] [2020-10-13 23:33:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:31,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:36,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:33:36,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:36,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:36,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:36,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:36,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:36,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:36,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:36,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:36,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:36,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-13 23:33:36,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134248331] [2020-10-13 23:33:36,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:36,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:33:36,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438514683] [2020-10-13 23:33:36,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:33:36,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:33:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:33:36,677 INFO L87 Difference]: Start difference. First operand 306 states and 316 transitions. Second operand 13 states. [2020-10-13 23:33:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:36,825 INFO L93 Difference]: Finished difference Result 590 states and 610 transitions. [2020-10-13 23:33:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:33:36,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 301 [2020-10-13 23:33:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:36,828 INFO L225 Difference]: With dead ends: 590 [2020-10-13 23:33:36,828 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 23:33:36,829 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 [2020-10-13 23:33:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 23:33:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2020-10-13 23:33:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-13 23:33:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 318 transitions. [2020-10-13 23:33:36,839 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 318 transitions. Word has length 301 [2020-10-13 23:33:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:36,839 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 318 transitions. [2020-10-13 23:33:36,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:33:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 318 transitions. [2020-10-13 23:33:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-13 23:33:36,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:36,841 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:36,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:33:36,842 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:36,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1436177718, now seen corresponding path program 23 times [2020-10-13 23:33:36,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:36,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249579786] [2020-10-13 23:33:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:42,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5540 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:33:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:42,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:42,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:42,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:42,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:42,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:42,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:42,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:42,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:42,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1668 trivial. 0 not checked. [2020-10-13 23:33:42,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249579786] [2020-10-13 23:33:42,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:42,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:33:42,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642929672] [2020-10-13 23:33:42,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:33:42,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:33:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:42,653 INFO L87 Difference]: Start difference. First operand 308 states and 318 transitions. Second operand 18 states. [2020-10-13 23:33:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:43,403 INFO L93 Difference]: Finished difference Result 586 states and 613 transitions. [2020-10-13 23:33:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:33:43,403 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 303 [2020-10-13 23:33:43,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:43,406 INFO L225 Difference]: With dead ends: 586 [2020-10-13 23:33:43,406 INFO L226 Difference]: Without dead ends: 335 [2020-10-13 23:33:43,408 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 [2020-10-13 23:33:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-13 23:33:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 326. [2020-10-13 23:33:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-13 23:33:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 336 transitions. [2020-10-13 23:33:43,416 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 336 transitions. Word has length 303 [2020-10-13 23:33:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:43,416 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 336 transitions. [2020-10-13 23:33:43,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:33:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 336 transitions. [2020-10-13 23:33:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-13 23:33:43,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:43,419 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:43,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:33:43,419 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1775390468, now seen corresponding path program 24 times [2020-10-13 23:33:43,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:43,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872072299] [2020-10-13 23:33:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:48,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-13 23:33:48,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:48,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5230 [2020-10-13 23:33:48,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:48,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:33:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:48,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:33:48,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:48,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:48,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:48,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:48,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:48,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:48,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:48,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:48,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:48,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2020-10-13 23:33:48,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872072299] [2020-10-13 23:33:48,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:48,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:33:48,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096023805] [2020-10-13 23:33:48,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:33:48,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:48,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:33:48,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:48,923 INFO L87 Difference]: Start difference. First operand 326 states and 336 transitions. Second operand 14 states. [2020-10-13 23:33:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:49,127 INFO L93 Difference]: Finished difference Result 628 states and 648 transitions. [2020-10-13 23:33:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:33:49,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 321 [2020-10-13 23:33:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:49,130 INFO L225 Difference]: With dead ends: 628 [2020-10-13 23:33:49,130 INFO L226 Difference]: Without dead ends: 329 [2020-10-13 23:33:49,133 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 [2020-10-13 23:33:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-13 23:33:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2020-10-13 23:33:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-13 23:33:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 338 transitions. [2020-10-13 23:33:49,149 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 338 transitions. Word has length 321 [2020-10-13 23:33:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:49,149 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 338 transitions. [2020-10-13 23:33:49,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:33:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 338 transitions. [2020-10-13 23:33:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-13 23:33:49,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:49,153 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:49,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:33:49,154 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:49,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:49,154 INFO L82 PathProgramCache]: Analyzing trace with hash 290895266, now seen corresponding path program 25 times [2020-10-13 23:33:49,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:49,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902015476] [2020-10-13 23:33:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:49,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:54,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:54,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-13 23:33:54,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:54,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-13 23:33:54,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:54,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:33:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 23:33:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:33:54,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:54,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:54,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:54,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:54,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:54,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:54,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:33:54,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:54,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:54,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:54,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2146 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1921 trivial. 0 not checked. [2020-10-13 23:33:54,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902015476] [2020-10-13 23:33:54,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:54,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:33:54,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655922730] [2020-10-13 23:33:54,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:33:54,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:33:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:54,723 INFO L87 Difference]: Start difference. First operand 328 states and 338 transitions. Second operand 19 states. [2020-10-13 23:33:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:55,435 INFO L93 Difference]: Finished difference Result 622 states and 649 transitions. [2020-10-13 23:33:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:33:55,438 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 323 [2020-10-13 23:33:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:55,440 INFO L225 Difference]: With dead ends: 622 [2020-10-13 23:33:55,440 INFO L226 Difference]: Without dead ends: 355 [2020-10-13 23:33:55,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-13 23:33:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 346. [2020-10-13 23:33:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-13 23:33:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 356 transitions. [2020-10-13 23:33:55,452 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 356 transitions. Word has length 323 [2020-10-13 23:33:55,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:55,453 INFO L479 AbstractCegarLoop]: Abstraction has 346 states and 356 transitions. [2020-10-13 23:33:55,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:33:55,453 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 356 transitions. [2020-10-13 23:33:55,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-13 23:33:55,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:55,455 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:55,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:33:55,455 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:55,456 INFO L82 PathProgramCache]: Analyzing trace with hash -283612048, now seen corresponding path program 26 times [2020-10-13 23:33:55,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:55,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027855138] [2020-10-13 23:33:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:55,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:34:00,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:34:00,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:00,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:00,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:00,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:00,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:00,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2020-10-13 23:34:00,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027855138] [2020-10-13 23:34:00,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:00,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:34:00,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027398044] [2020-10-13 23:34:00,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:34:00,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:34:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:34:00,880 INFO L87 Difference]: Start difference. First operand 346 states and 356 transitions. Second operand 20 states. [2020-10-13 23:34:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:01,723 INFO L93 Difference]: Finished difference Result 656 states and 683 transitions. [2020-10-13 23:34:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:34:01,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 341 [2020-10-13 23:34:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:01,726 INFO L225 Difference]: With dead ends: 656 [2020-10-13 23:34:01,726 INFO L226 Difference]: Without dead ends: 373 [2020-10-13 23:34:01,728 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 [2020-10-13 23:34:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-13 23:34:01,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 364. [2020-10-13 23:34:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-13 23:34:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 374 transitions. [2020-10-13 23:34:01,738 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 374 transitions. Word has length 341 [2020-10-13 23:34:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:01,738 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 374 transitions. [2020-10-13 23:34:01,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:34:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 374 transitions. [2020-10-13 23:34:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-13 23:34:01,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:01,741 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:01,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:34:01,741 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash 128175038, now seen corresponding path program 27 times [2020-10-13 23:34:01,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:01,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392812226] [2020-10-13 23:34:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:01,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:02,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:02,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:02,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 367 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:34:06,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:06,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:06,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:06,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:06,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:06,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:06,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2020-10-13 23:34:07,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392812226] [2020-10-13 23:34:07,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:07,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:34:07,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718222792] [2020-10-13 23:34:07,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:34:07,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:07,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:34:07,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:34:07,014 INFO L87 Difference]: Start difference. First operand 364 states and 374 transitions. Second operand 15 states. [2020-10-13 23:34:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:07,146 INFO L93 Difference]: Finished difference Result 702 states and 722 transitions. [2020-10-13 23:34:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:34:07,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 359 [2020-10-13 23:34:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:07,148 INFO L225 Difference]: With dead ends: 702 [2020-10-13 23:34:07,148 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 23:34:07,149 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 [2020-10-13 23:34:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 23:34:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 366. [2020-10-13 23:34:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-13 23:34:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 376 transitions. [2020-10-13 23:34:07,160 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 376 transitions. Word has length 359 [2020-10-13 23:34:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:07,161 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 376 transitions. [2020-10-13 23:34:07,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:34:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 376 transitions. [2020-10-13 23:34:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-13 23:34:07,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:07,163 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:07,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:34:07,164 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1564756956, now seen corresponding path program 28 times [2020-10-13 23:34:07,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:07,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357364714] [2020-10-13 23:34:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:07,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5494 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:34:12,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:12,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:12,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:12,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:12,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:34:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2456 trivial. 0 not checked. [2020-10-13 23:34:13,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357364714] [2020-10-13 23:34:13,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:13,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:34:13,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791545674] [2020-10-13 23:34:13,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:34:13,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:34:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:34:13,023 INFO L87 Difference]: Start difference. First operand 366 states and 376 transitions. Second operand 21 states. [2020-10-13 23:34:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:13,900 INFO L93 Difference]: Finished difference Result 692 states and 719 transitions. [2020-10-13 23:34:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:34:13,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 361 [2020-10-13 23:34:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:13,903 INFO L225 Difference]: With dead ends: 692 [2020-10-13 23:34:13,903 INFO L226 Difference]: Without dead ends: 393 [2020-10-13 23:34:13,904 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 [2020-10-13 23:34:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-13 23:34:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 384. [2020-10-13 23:34:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-13 23:34:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 394 transitions. [2020-10-13 23:34:13,913 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 394 transitions. Word has length 361 [2020-10-13 23:34:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:13,914 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 394 transitions. [2020-10-13 23:34:13,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:34:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 394 transitions. [2020-10-13 23:34:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-10-13 23:34:13,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:13,917 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:13,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:34:13,917 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:13,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1022863402, now seen corresponding path program 29 times [2020-10-13 23:34:13,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:13,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459826881] [2020-10-13 23:34:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:13,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:19,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 387 [2020-10-13 23:34:19,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5404 [2020-10-13 23:34:19,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:19,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:34:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:34:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:19,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:19,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:19,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:19,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:19,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:19,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:19,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2020-10-13 23:34:19,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459826881] [2020-10-13 23:34:19,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:19,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:34:19,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295920225] [2020-10-13 23:34:19,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:34:19,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:34:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:34:19,572 INFO L87 Difference]: Start difference. First operand 384 states and 394 transitions. Second operand 16 states. [2020-10-13 23:34:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:19,756 INFO L93 Difference]: Finished difference Result 740 states and 760 transitions. [2020-10-13 23:34:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:34:19,757 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 379 [2020-10-13 23:34:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:19,759 INFO L225 Difference]: With dead ends: 740 [2020-10-13 23:34:19,759 INFO L226 Difference]: Without dead ends: 387 [2020-10-13 23:34:19,760 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 [2020-10-13 23:34:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-13 23:34:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2020-10-13 23:34:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-13 23:34:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 396 transitions. [2020-10-13 23:34:19,769 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 396 transitions. Word has length 379 [2020-10-13 23:34:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:19,770 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 396 transitions. [2020-10-13 23:34:19,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:34:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 396 transitions. [2020-10-13 23:34:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-13 23:34:19,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:19,773 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:19,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:34:19,773 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2001005896, now seen corresponding path program 30 times [2020-10-13 23:34:19,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:19,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263092744] [2020-10-13 23:34:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:24,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 389 [2020-10-13 23:34:24,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:24,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-13 23:34:24,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:24,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:34:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-13 23:34:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:34:24,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:25,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:25,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:25,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:25,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:25,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:25,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:25,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3085 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2761 trivial. 0 not checked. [2020-10-13 23:34:25,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263092744] [2020-10-13 23:34:25,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:25,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:34:25,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879863440] [2020-10-13 23:34:25,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:34:25,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:34:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:34:25,225 INFO L87 Difference]: Start difference. First operand 386 states and 396 transitions. Second operand 22 states. [2020-10-13 23:34:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:26,159 INFO L93 Difference]: Finished difference Result 728 states and 755 transitions. [2020-10-13 23:34:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:34:26,160 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 381 [2020-10-13 23:34:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:26,163 INFO L225 Difference]: With dead ends: 728 [2020-10-13 23:34:26,163 INFO L226 Difference]: Without dead ends: 413 [2020-10-13 23:34:26,165 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 [2020-10-13 23:34:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-13 23:34:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 404. [2020-10-13 23:34:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-13 23:34:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 414 transitions. [2020-10-13 23:34:26,173 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 414 transitions. Word has length 381 [2020-10-13 23:34:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:26,174 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 414 transitions. [2020-10-13 23:34:26,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:34:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 414 transitions. [2020-10-13 23:34:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-10-13 23:34:26,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:26,177 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:26,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:34:26,177 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1738786454, now seen corresponding path program 31 times [2020-10-13 23:34:26,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:26,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4469914] [2020-10-13 23:34:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:26,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:31,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 407 [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-13 23:34:31,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:34:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:31,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:31,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:31,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:31,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2020-10-13 23:34:31,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4469914] [2020-10-13 23:34:31,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:31,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:34:31,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840238150] [2020-10-13 23:34:31,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:34:31,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:34:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:34:31,685 INFO L87 Difference]: Start difference. First operand 404 states and 414 transitions. Second operand 23 states. [2020-10-13 23:34:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:32,650 INFO L93 Difference]: Finished difference Result 762 states and 789 transitions. [2020-10-13 23:34:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:34:32,650 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 399 [2020-10-13 23:34:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:32,653 INFO L225 Difference]: With dead ends: 762 [2020-10-13 23:34:32,653 INFO L226 Difference]: Without dead ends: 431 [2020-10-13 23:34:32,654 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 [2020-10-13 23:34:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-13 23:34:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 422. [2020-10-13 23:34:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-10-13 23:34:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 432 transitions. [2020-10-13 23:34:32,664 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 432 transitions. Word has length 399 [2020-10-13 23:34:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:32,665 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 432 transitions. [2020-10-13 23:34:32,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:34:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 432 transitions. [2020-10-13 23:34:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-10-13 23:34:32,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:32,668 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:32,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:34:32,668 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:32,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1695066212, now seen corresponding path program 32 times [2020-10-13 23:34:32,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:32,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804547053] [2020-10-13 23:34:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:32,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:32,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:32,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:32,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:34:37,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:37,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:37,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:37,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:37,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:37,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:37,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:37,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3769 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2020-10-13 23:34:37,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804547053] [2020-10-13 23:34:37,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:37,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:34:37,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637109422] [2020-10-13 23:34:37,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:34:37,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:37,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:34:37,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:34:37,997 INFO L87 Difference]: Start difference. First operand 422 states and 432 transitions. Second operand 17 states. [2020-10-13 23:34:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:38,159 INFO L93 Difference]: Finished difference Result 814 states and 834 transitions. [2020-10-13 23:34:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:34:38,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 417 [2020-10-13 23:34:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:38,162 INFO L225 Difference]: With dead ends: 814 [2020-10-13 23:34:38,162 INFO L226 Difference]: Without dead ends: 425 [2020-10-13 23:34:38,163 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 [2020-10-13 23:34:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-13 23:34:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 424. [2020-10-13 23:34:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-13 23:34:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 434 transitions. [2020-10-13 23:34:38,173 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 434 transitions. Word has length 417 [2020-10-13 23:34:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:38,173 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 434 transitions. [2020-10-13 23:34:38,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:34:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 434 transitions. [2020-10-13 23:34:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-13 23:34:38,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:38,176 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:38,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:34:38,176 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1314334466, now seen corresponding path program 33 times [2020-10-13 23:34:38,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:38,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651489516] [2020-10-13 23:34:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:38,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-10-13 23:34:43,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:43,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5209 [2020-10-13 23:34:43,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:34:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 209 [2020-10-13 23:34:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:34:43,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:43,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:43,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:43,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:43,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:43,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:43,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:43,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3796 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3396 trivial. 0 not checked. [2020-10-13 23:34:43,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651489516] [2020-10-13 23:34:43,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:43,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:34:43,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141853555] [2020-10-13 23:34:43,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:34:43,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:43,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:34:43,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:43,823 INFO L87 Difference]: Start difference. First operand 424 states and 434 transitions. Second operand 24 states. [2020-10-13 23:34:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:44,877 INFO L93 Difference]: Finished difference Result 798 states and 825 transitions. [2020-10-13 23:34:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:34:44,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 419 [2020-10-13 23:34:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:44,880 INFO L225 Difference]: With dead ends: 798 [2020-10-13 23:34:44,880 INFO L226 Difference]: Without dead ends: 451 [2020-10-13 23:34:44,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-13 23:34:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 442. [2020-10-13 23:34:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-13 23:34:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 452 transitions. [2020-10-13 23:34:44,890 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 452 transitions. Word has length 419 [2020-10-13 23:34:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:44,891 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 452 transitions. [2020-10-13 23:34:44,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:34:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 452 transitions. [2020-10-13 23:34:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-10-13 23:34:44,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:44,894 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:44,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:34:44,895 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1078606384, now seen corresponding path program 34 times [2020-10-13 23:34:44,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:44,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578745142] [2020-10-13 23:34:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:44,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:45,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:50,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:50,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 445 [2020-10-13 23:34:50,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:50,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5324 [2020-10-13 23:34:50,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:50,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:50,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:34:50,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:34:50,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:50,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:50,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:50,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:50,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:50,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:50,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:34:50,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:50,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:50,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:50,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:50,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:50,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4165 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2020-10-13 23:34:50,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578745142] [2020-10-13 23:34:50,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:50,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:34:50,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478299204] [2020-10-13 23:34:50,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:34:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:34:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:50,553 INFO L87 Difference]: Start difference. First operand 442 states and 452 transitions. Second operand 18 states. [2020-10-13 23:34:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:50,756 INFO L93 Difference]: Finished difference Result 852 states and 872 transitions. [2020-10-13 23:34:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:34:50,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 437 [2020-10-13 23:34:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:50,758 INFO L225 Difference]: With dead ends: 852 [2020-10-13 23:34:50,759 INFO L226 Difference]: Without dead ends: 445 [2020-10-13 23:34:50,760 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 [2020-10-13 23:34:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-13 23:34:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2020-10-13 23:34:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-13 23:34:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 454 transitions. [2020-10-13 23:34:50,772 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 454 transitions. Word has length 437 [2020-10-13 23:34:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:50,772 INFO L479 AbstractCegarLoop]: Abstraction has 444 states and 454 transitions. [2020-10-13 23:34:50,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:34:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 454 transitions. [2020-10-13 23:34:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-10-13 23:34:50,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:50,776 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:50,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:34:50,776 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:50,776 INFO L82 PathProgramCache]: Analyzing trace with hash 88131950, now seen corresponding path program 35 times [2020-10-13 23:34:50,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:50,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290801995] [2020-10-13 23:34:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:50,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:50,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:50,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:51,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:51,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:56,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:56,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 447 [2020-10-13 23:34:56,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5549 [2020-10-13 23:34:56,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:56,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:34:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-10-13 23:34:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:34:56,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:56,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:56,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:56,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:56,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:56,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:56,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:56,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:56,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:56,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4194 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3753 trivial. 0 not checked. [2020-10-13 23:34:56,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290801995] [2020-10-13 23:34:56,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:56,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:34:56,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813444010] [2020-10-13 23:34:56,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:34:56,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:56,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:34:56,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:56,799 INFO L87 Difference]: Start difference. First operand 444 states and 454 transitions. Second operand 25 states. [2020-10-13 23:34:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:57,908 INFO L93 Difference]: Finished difference Result 834 states and 861 transitions. [2020-10-13 23:34:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:34:57,908 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 439 [2020-10-13 23:34:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:57,911 INFO L225 Difference]: With dead ends: 834 [2020-10-13 23:34:57,911 INFO L226 Difference]: Without dead ends: 471 [2020-10-13 23:34:57,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-10-13 23:34:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2020-10-13 23:34:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-13 23:34:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 472 transitions. [2020-10-13 23:34:57,921 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 472 transitions. Word has length 439 [2020-10-13 23:34:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:57,922 INFO L479 AbstractCegarLoop]: Abstraction has 462 states and 472 transitions. [2020-10-13 23:34:57,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:34:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 472 transitions. [2020-10-13 23:34:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-10-13 23:34:57,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:57,925 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:57,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:34:57,926 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash -893606596, now seen corresponding path program 36 times [2020-10-13 23:34:57,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:57,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82825250] [2020-10-13 23:34:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:57,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 465 [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5260 [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:03,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:35:03,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:03,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:03,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:03,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:03,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:03,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:03,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:03,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:03,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4581 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4356 trivial. 0 not checked. [2020-10-13 23:35:03,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82825250] [2020-10-13 23:35:03,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:03,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:35:03,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844327435] [2020-10-13 23:35:03,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:35:03,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:03,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:35:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:03,578 INFO L87 Difference]: Start difference. First operand 462 states and 472 transitions. Second operand 19 states. [2020-10-13 23:35:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:03,728 INFO L93 Difference]: Finished difference Result 890 states and 910 transitions. [2020-10-13 23:35:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:35:03,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 457 [2020-10-13 23:35:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:03,731 INFO L225 Difference]: With dead ends: 890 [2020-10-13 23:35:03,731 INFO L226 Difference]: Without dead ends: 465 [2020-10-13 23:35:03,732 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 [2020-10-13 23:35:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-13 23:35:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 464. [2020-10-13 23:35:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-10-13 23:35:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 474 transitions. [2020-10-13 23:35:03,740 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 474 transitions. Word has length 457 [2020-10-13 23:35:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:03,740 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 474 transitions. [2020-10-13 23:35:03,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:35:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 474 transitions. [2020-10-13 23:35:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-10-13 23:35:03,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:03,744 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:03,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:35:03,744 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1846521306, now seen corresponding path program 37 times [2020-10-13 23:35:03,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:03,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421681974] [2020-10-13 23:35:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:08,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:08,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-10-13 23:35:08,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:35:08,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-13 23:35:08,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:08,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:35:08,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-13 23:35:08,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:35:08,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:09,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4612 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4128 trivial. 0 not checked. [2020-10-13 23:35:09,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421681974] [2020-10-13 23:35:09,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:09,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:35:09,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674018729] [2020-10-13 23:35:09,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:35:09,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:09,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:35:09,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:35:09,403 INFO L87 Difference]: Start difference. First operand 464 states and 474 transitions. Second operand 26 states.