/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-cav19/array_init_var_plus_ind2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:10:41,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:10:41,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:10:41,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:10:41,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:10:41,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:10:41,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:10:41,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:10:41,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:10:41,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:10:41,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:10:41,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:10:41,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:10:41,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:10:41,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:10:41,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:10:41,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:10:41,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:10:41,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:10:41,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:10:41,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:10:41,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:10:41,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:10:41,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:10:41,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:10:41,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:10:41,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:10:41,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:10:41,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:10:41,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:10:41,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:10:41,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:10:41,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:10:41,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:10:41,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:10:41,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:10:41,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:10:41,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:10:41,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:10:41,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:10:41,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:10:41,667 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 23:10:41,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:10:41,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:10:41,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:10:41,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:10:41,711 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:10:41,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:10:41,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:10:41,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:10:41,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:10:41,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:10:41,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:10:41,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:10:41,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:10:41,714 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:10:41,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:10:41,715 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:10:41,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:10:41,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:10:41,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:10:41,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:10:41,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:10:41,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:10:41,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:10:41,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:10:41,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:10:41,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:10:41,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:10:41,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:10:41,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:10:41,717 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 23:10:42,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:10:42,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:10:42,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:10:42,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:10:42,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:10:42,059 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-13 23:10:42,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1042f1c61/00548605f8d146329d639de1d03cec5d/FLAG30766d9ff [2020-10-13 23:10:42,604 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:10:42,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-13 23:10:42,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1042f1c61/00548605f8d146329d639de1d03cec5d/FLAG30766d9ff [2020-10-13 23:10:42,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1042f1c61/00548605f8d146329d639de1d03cec5d [2020-10-13 23:10:42,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:10:42,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:10:42,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:10:42,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:10:42,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:10:42,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:42" (1/1) ... [2020-10-13 23:10:42,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390ac93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:42, skipping insertion in model container [2020-10-13 23:10:42,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:42" (1/1) ... [2020-10-13 23:10:42,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:10:43,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:10:43,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:10:43,191 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:10:43,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:10:43,235 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:10:43,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43 WrapperNode [2020-10-13 23:10:43,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:10:43,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:10:43,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:10:43,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:10:43,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:10:43,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:10:43,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:10:43,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:10:43,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (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 23:10:43,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:10:43,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:10:43,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:10:43,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:10:43,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:10:43,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:10:43,465 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:10:43,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:10:43,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:10:43,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:10:43,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:10:43,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:10:43,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:10:43,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:10:43,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:10:43,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:10:43,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:10:43,691 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:10:43,692 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 23:10:43,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:43 BoogieIcfgContainer [2020-10-13 23:10:43,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:10:43,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:10:43,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:10:43,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:10:43,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:10:42" (1/3) ... [2020-10-13 23:10:43,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a7bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:43, skipping insertion in model container [2020-10-13 23:10:43,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (2/3) ... [2020-10-13 23:10:43,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a7bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:43, skipping insertion in model container [2020-10-13 23:10:43,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:43" (3/3) ... [2020-10-13 23:10:43,705 INFO L109 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2020-10-13 23:10:43,717 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:10:43,726 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:10:43,742 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:10:43,774 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:10:43,775 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:10:43,775 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:10:43,775 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:10:43,776 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:10:43,776 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:10:43,776 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:10:43,776 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:10:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 23:10:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:10:43,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:43,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:43,810 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:43,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1594784639, now seen corresponding path program 1 times [2020-10-13 23:10:43,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:43,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786692969] [2020-10-13 23:10:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:43,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:10:44,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:44,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-13 23:10:44,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:10:44,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:44,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:10:44,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:10:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:44,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:44,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 23:10:44,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:44,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:44,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:44,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:44,433 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 23:10:44,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786692969] [2020-10-13 23:10:44,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:10:44,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:10:44,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121947978] [2020-10-13 23:10:44,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:10:44,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:44,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:10:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:10:44,461 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-13 23:10:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:44,647 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-13 23:10:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:10:44,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 23:10:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:44,659 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:10:44,660 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:10:44,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:10:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:10:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-10-13 23:10:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:10:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 23:10:44,710 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-13 23:10:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:44,710 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 23:10:44,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:10:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 23:10:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 23:10:44,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:44,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:44,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:10:44,713 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:44,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1672402483, now seen corresponding path program 1 times [2020-10-13 23:10:44,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:44,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774033181] [2020-10-13 23:10:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:10:44,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:44,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-13 23:10:44,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:10:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:44,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:10:44,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:44,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:44,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:44,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:44,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:44,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:44,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:44,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:44,869 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 23:10:44,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774033181] [2020-10-13 23:10:44,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:10:44,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:10:44,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809296489] [2020-10-13 23:10:44,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:10:44,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:44,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:10:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:10:44,875 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 23:10:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:44,959 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-13 23:10:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:10:44,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 23:10:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:44,961 INFO L225 Difference]: With dead ends: 35 [2020-10-13 23:10:44,961 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 23:10:44,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 23:10:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 23:10:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:10:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 23:10:44,971 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-10-13 23:10:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:44,971 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 23:10:44,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:10:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 23:10:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:10:44,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:44,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:44,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:10:44,985 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash -973616762, now seen corresponding path program 1 times [2020-10-13 23:10:44,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:44,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810787233] [2020-10-13 23:10:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:10:45,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:45,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-13 23:10:45,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:10:45,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:45,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:10:45,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:45,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:10:45,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:45,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:45,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:45,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810787233] [2020-10-13 23:10:45,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:45,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:10:45,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909250275] [2020-10-13 23:10:45,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:10:45,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:45,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:10:45,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,302 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-13 23:10:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:45,429 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-13 23:10:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:10:45,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 23:10:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:45,431 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:10:45,431 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:10:45,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:10:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:10:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-10-13 23:10:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:10:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 23:10:45,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-10-13 23:10:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:45,440 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 23:10:45,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:10:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 23:10:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:10:45,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:45,441 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:45,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:10:45,441 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 311532710, now seen corresponding path program 1 times [2020-10-13 23:10:45,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:45,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474822756] [2020-10-13 23:10:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:10:45,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 23:10:45,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:10:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:45,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:10:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:45,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:45,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:45,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:45,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:45,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474822756] [2020-10-13 23:10:45,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:45,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:10:45,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489251069] [2020-10-13 23:10:45,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:10:45,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:10:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,565 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-13 23:10:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:45,645 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-13 23:10:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:10:45,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 23:10:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:45,647 INFO L225 Difference]: With dead ends: 38 [2020-10-13 23:10:45,647 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:10:45,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:10:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 23:10:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:10:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 23:10:45,654 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-13 23:10:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:45,654 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 23:10:45,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:10:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 23:10:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:10:45,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:45,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:45,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:10:45,656 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1377375713, now seen corresponding path program 2 times [2020-10-13 23:10:45,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:45,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916558494] [2020-10-13 23:10:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:10:46,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:46,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-13 23:10:46,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:10:46,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:10:46,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:46,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:46,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:10:46,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:46,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:46,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916558494] [2020-10-13 23:10:46,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:46,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:10:46,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434520186] [2020-10-13 23:10:46,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:10:46,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:10:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:10:46,204 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 23:10:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:46,402 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-13 23:10:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:10:46,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 23:10:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:46,404 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:10:46,405 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:10:46,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:10:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:10:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-13 23:10:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:10:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 23:10:46,412 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-13 23:10:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:46,413 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 23:10:46,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:10:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 23:10:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:10:46,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:46,414 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:46,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:10:46,415 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash 679907117, now seen corresponding path program 2 times [2020-10-13 23:10:46,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:46,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038113750] [2020-10-13 23:10:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:10:46,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:46,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-13 23:10:46,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:10:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:10:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:46,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:46,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:46,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:46,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:46,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:46,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:46,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038113750] [2020-10-13 23:10:46,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:46,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:10:46,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268067568] [2020-10-13 23:10:46,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:10:46,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:46,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:10:46,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:10:46,729 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-10-13 23:10:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:47,052 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-13 23:10:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:10:47,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-13 23:10:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:47,055 INFO L225 Difference]: With dead ends: 43 [2020-10-13 23:10:47,055 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:10:47,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:10:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:10:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-13 23:10:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:10:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 23:10:47,064 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2020-10-13 23:10:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:47,065 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 23:10:47,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:10:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 23:10:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:10:47,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:47,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:47,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:10:47,067 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash 443111142, now seen corresponding path program 3 times [2020-10-13 23:10:47,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:47,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341666773] [2020-10-13 23:10:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:10:47,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:10:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-13 23:10:47,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:10:47,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:47,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:10:47,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:47,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:10:47,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:47,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:47,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:47,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341666773] [2020-10-13 23:10:47,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:47,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:10:47,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139368997] [2020-10-13 23:10:47,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:10:47,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:47,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:10:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:10:47,909 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-10-13 23:10:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:48,172 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-13 23:10:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:10:48,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 23:10:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:48,177 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:10:48,178 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 23:10:48,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:10:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 23:10:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-13 23:10:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:10:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 23:10:48,187 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 22 [2020-10-13 23:10:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:48,188 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 23:10:48,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:10:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 23:10:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:10:48,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:48,189 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:48,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:10:48,190 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1280424774, now seen corresponding path program 3 times [2020-10-13 23:10:48,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:48,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279451918] [2020-10-13 23:10:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:48,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:48,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:10:48,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-13 23:10:48,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:48,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:10:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:10:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:49,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:49,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:49,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:49,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:49,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:10:49,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:49,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:49,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:49,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:49,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:49,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:49,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279451918] [2020-10-13 23:10:49,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:49,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:10:49,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830993070] [2020-10-13 23:10:49,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:10:49,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:10:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:10:49,058 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 12 states. [2020-10-13 23:10:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:49,450 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-13 23:10:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:10:49,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-13 23:10:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:49,452 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:10:49,452 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:10:49,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:10:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:10:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-13 23:10:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:10:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 23:10:49,461 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2020-10-13 23:10:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:49,461 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 23:10:49,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:10:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 23:10:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:10:49,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:49,462 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:49,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:10:49,463 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:49,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2014961855, now seen corresponding path program 4 times [2020-10-13 23:10:49,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:49,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131464397] [2020-10-13 23:10:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:49,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:49,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:50,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:10:50,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:10:50,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-13 23:10:50,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:50,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:50,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:10:50,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:50,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:10:50,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:50,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:50,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:50,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:50,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:50,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:50,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:50,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:50,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:50,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:50,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:50,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131464397] [2020-10-13 23:10:50,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:50,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:10:50,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087950957] [2020-10-13 23:10:50,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:10:50,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:50,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:10:50,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:10:50,494 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2020-10-13 23:10:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:50,725 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-13 23:10:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:10:50,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 23:10:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:50,727 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:10:50,727 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:10:50,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:10:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:10:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-10-13 23:10:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:10:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 23:10:50,737 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 25 [2020-10-13 23:10:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:50,737 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 23:10:50,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:10:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 23:10:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:10:50,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:50,739 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:50,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:10:50,739 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1531810675, now seen corresponding path program 4 times [2020-10-13 23:10:50,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:50,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783617202] [2020-10-13 23:10:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:50,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:51,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:51,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:51,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:10:51,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:10:51,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-13 23:10:51,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:51,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:10:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:10:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:51,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:51,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:51,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:51,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:51,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:51,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:51,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783617202] [2020-10-13 23:10:51,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:51,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:10:51,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311662576] [2020-10-13 23:10:51,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:10:51,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:10:51,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:10:51,891 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 14 states. [2020-10-13 23:10:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:52,478 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-13 23:10:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:10:52,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-13 23:10:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:52,480 INFO L225 Difference]: With dead ends: 61 [2020-10-13 23:10:52,480 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:10:52,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:10:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:10:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2020-10-13 23:10:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:10:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-13 23:10:52,489 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2020-10-13 23:10:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:52,490 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-13 23:10:52,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:10:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-13 23:10:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:10:52,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:52,491 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:52,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:10:52,491 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash -91295004, now seen corresponding path program 1 times [2020-10-13 23:10:52,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:52,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842131763] [2020-10-13 23:10:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:52,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:52,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:10:52,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:52,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 23:10:52,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:52,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:10:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:10:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:52,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:52,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:52,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:52,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:52,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:52,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:52,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:52,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:52,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 23:10:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:52,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:52,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:52,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:10:52,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:52,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:10:52,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:52,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:52,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:10:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:52,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842131763] [2020-10-13 23:10:52,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:52,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:10:52,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957628065] [2020-10-13 23:10:52,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:10:52,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:10:52,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:10:52,659 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2020-10-13 23:10:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:52,765 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-13 23:10:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:10:52,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-13 23:10:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:52,766 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:10:52,766 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:10:52,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:10:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:10:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 23:10:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:10:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-13 23:10:52,786 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 28 [2020-10-13 23:10:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:52,787 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-13 23:10:52,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:10:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-13 23:10:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:10:52,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:52,788 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:52,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:10:52,789 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1629287933, now seen corresponding path program 2 times [2020-10-13 23:10:52,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:52,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144680749] [2020-10-13 23:10:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:52,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:52,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:53,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:53,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:10:53,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:10:53,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-13 23:10:53,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:53,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:10:53,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:53,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:10:53,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:53,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:53,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:53,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:53,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:53,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:53,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:53,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:53,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:53,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:53,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:53,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:53,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:10:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:53,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:53,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:10:53,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:53,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:53,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:53,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:10:53,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:53,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144680749] [2020-10-13 23:10:53,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:53,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:10:53,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676356192] [2020-10-13 23:10:53,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:10:53,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:10:53,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:10:53,476 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 14 states. [2020-10-13 23:10:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:53,802 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-13 23:10:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:10:53,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-13 23:10:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:53,804 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:10:53,804 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:10:53,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:10:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:10:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-10-13 23:10:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 23:10:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-13 23:10:53,815 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2020-10-13 23:10:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:53,815 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-13 23:10:53,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:10:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-13 23:10:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:10:53,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:53,818 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:53,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:10:53,818 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:53,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:53,819 INFO L82 PathProgramCache]: Analyzing trace with hash -919113660, now seen corresponding path program 3 times [2020-10-13 23:10:53,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:53,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319029356] [2020-10-13 23:10:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:53,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:54,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:54,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:55,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:10:55,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:10:55,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1291 [2020-10-13 23:10:55,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:55,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:10:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:10:55,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:55,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:55,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:55,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:55,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:55,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:55,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:55,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 23:10:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:55,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:10:55,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:55,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:10:55,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:55,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:55,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:10:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:55,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:10:55,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:10:55,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319029356] [2020-10-13 23:10:55,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:55,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:10:55,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127907447] [2020-10-13 23:10:55,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:10:55,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:10:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:10:55,583 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 18 states. [2020-10-13 23:10:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:56,474 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-13 23:10:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:10:56,474 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-13 23:10:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:56,476 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:10:56,476 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:10:56,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:10:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:10:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2020-10-13 23:10:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:10:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-13 23:10:56,491 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 34 [2020-10-13 23:10:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:56,492 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-13 23:10:56,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:10:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-13 23:10:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:10:56,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:56,494 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:56,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:10:56,495 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash 145594109, now seen corresponding path program 1 times [2020-10-13 23:10:56,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:56,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310169154] [2020-10-13 23:10:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:56,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:56,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:57,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:57,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:57,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:58,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:58,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:59,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:59,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:10:59,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:10:59,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2576 [2020-10-13 23:10:59,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:59,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:10:59,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:10:59,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:10:59,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:59,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:59,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:59,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:59,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:59,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:59,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:59,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:10:59,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 23:10:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:59,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:59,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:10:59,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:59,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:10:59,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:59,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:10:59,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:59,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:10:59,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310169154] [2020-10-13 23:10:59,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:59,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:10:59,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046684848] [2020-10-13 23:10:59,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:10:59,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:10:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:10:59,182 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 10 states. [2020-10-13 23:10:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:59,411 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-13 23:10:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:10:59,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-13 23:10:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:59,413 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:10:59,413 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:10:59,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:10:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:10:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-10-13 23:10:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:10:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-13 23:10:59,430 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 36 [2020-10-13 23:10:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:59,430 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-13 23:10:59,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:10:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-13 23:10:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:10:59,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:59,434 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:59,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:10:59,435 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1785920669, now seen corresponding path program 4 times [2020-10-13 23:10:59,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:59,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312820527] [2020-10-13 23:10:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:59,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:59,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:59,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:01,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:01,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:11:01,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:11:01,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2336 [2020-10-13 23:11:01,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:01,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:01,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:11:01,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:01,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:11:01,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:02,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:02,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:02,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:02,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:02,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:02,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:02,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:02,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 23:11:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:02,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:02,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:02,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:11:02,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:02,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:02,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:11:02,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312820527] [2020-10-13 23:11:02,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:02,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:11:02,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479222206] [2020-10-13 23:11:02,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:11:02,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:11:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:11:02,195 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 18 states. [2020-10-13 23:11:02,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:02,894 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-13 23:11:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:11:02,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-13 23:11:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:02,896 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:11:02,896 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:11:02,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:11:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:11:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2020-10-13 23:11:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:11:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-13 23:11:02,916 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 37 [2020-10-13 23:11:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:02,917 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-13 23:11:02,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:11:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-13 23:11:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:11:02,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:02,919 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:02,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:11:02,920 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:02,920 INFO L82 PathProgramCache]: Analyzing trace with hash -117864012, now seen corresponding path program 5 times [2020-10-13 23:11:02,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:02,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216194672] [2020-10-13 23:11:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:03,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:11:03,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:03,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-13 23:11:03,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:03,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:11:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:11:03,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:03,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:03,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:03,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:03,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:03,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:03,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:03,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:03,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:03,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:11:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:03,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:03,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:03,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:03,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:11:03,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:03,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:03,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 23:11:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:03,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:03,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:03,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 23:11:03,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:03,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:03,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:11:03,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216194672] [2020-10-13 23:11:03,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:03,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:11:03,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708231830] [2020-10-13 23:11:03,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:11:03,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:03,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:11:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:11:03,195 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 10 states. [2020-10-13 23:11:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:03,392 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2020-10-13 23:11:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:11:03,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 23:11:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:03,394 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:11:03,394 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:11:03,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:11:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:11:03,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 23:11:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:11:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 23:11:03,412 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 39 [2020-10-13 23:11:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:03,412 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 23:11:03,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:11:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 23:11:03,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:11:03,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:03,414 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:03,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:11:03,414 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1660210427, now seen corresponding path program 6 times [2020-10-13 23:11:03,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:03,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466699985] [2020-10-13 23:11:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:03,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:04,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:04,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:11:04,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1476 [2020-10-13 23:11:04,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:04,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:11:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:04,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:11:04,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:05,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:05,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:05,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:05,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:05,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:05,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:05,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:05,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:05,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:05,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 23:11:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:05,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:05,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:05,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:05,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:11:05,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:05,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:05,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:05,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 23:11:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:05,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:05,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:05,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:05,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:05,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:05,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:05,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:05,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:05,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:05,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:05,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:11:05,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466699985] [2020-10-13 23:11:05,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:05,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:11:05,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737438889] [2020-10-13 23:11:05,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:11:05,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:11:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:11:05,298 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 20 states. [2020-10-13 23:11:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:06,022 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-10-13 23:11:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:11:06,023 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-13 23:11:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:06,024 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:11:06,024 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:11:06,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:11:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:11:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-10-13 23:11:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:11:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 23:11:06,036 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 42 [2020-10-13 23:11:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:06,036 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 23:11:06,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:11:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 23:11:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:11:06,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:06,037 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:06,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:11:06,038 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:06,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1850806188, now seen corresponding path program 7 times [2020-10-13 23:11:06,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:06,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206455360] [2020-10-13 23:11:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:07,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:07,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:08,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:11,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:11:11,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:11:11,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:11:11,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:11,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:11,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:11:11,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:11,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:11:11,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:11,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:11,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:11,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:11,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:11,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:11,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:11,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:11,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:11,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:11,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:11,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:11,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 23:11:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:11,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:11,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:11,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:11,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:11,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:11,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:11,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:11,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:11,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:11,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:11,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:11:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:11,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:11,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:11,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:11,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:11:11,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:11,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:11,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:11,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:11:11,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206455360] [2020-10-13 23:11:11,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:11,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:11:11,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193399043] [2020-10-13 23:11:11,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:11:11,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:11,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:11:11,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:11:11,508 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 20 states. [2020-10-13 23:11:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:12,805 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-13 23:11:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:11:12,805 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-13 23:11:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:12,806 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:11:12,807 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:11:12,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:11:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:11:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2020-10-13 23:11:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:11:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-10-13 23:11:12,824 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 45 [2020-10-13 23:11:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:12,825 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-10-13 23:11:12,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:11:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-10-13 23:11:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:11:12,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:12,826 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:12,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:11:12,826 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2095588403, now seen corresponding path program 2 times [2020-10-13 23:11:12,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:12,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384475992] [2020-10-13 23:11:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:12,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:13,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:13,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:13,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:13,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:13,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:13,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:14,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:14,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:14,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:14,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:15,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:16,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:17,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:11:17,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 23:11:17,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4895 [2020-10-13 23:11:17,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:17,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:17,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:11:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:11:17,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:11:17,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:17,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:17,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:17,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:17,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:17,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:17,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:17,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:17,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:17,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:17,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:11:17,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:17,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 23:11:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:17,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:17,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:17,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:17,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:17,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:17,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:11:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:17,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 23:11:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:17,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:17,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:17,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:17,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:17,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:17,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:11:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:17,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:11:17,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384475992] [2020-10-13 23:11:17,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:17,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:11:17,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067181783] [2020-10-13 23:11:17,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:11:17,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:11:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:11:17,869 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 11 states. [2020-10-13 23:11:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:18,129 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2020-10-13 23:11:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:11:18,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 23:11:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:18,133 INFO L225 Difference]: With dead ends: 123 [2020-10-13 23:11:18,134 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 23:11:18,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:11:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 23:11:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2020-10-13 23:11:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:11:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-13 23:11:18,155 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 47 [2020-10-13 23:11:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:18,155 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-13 23:11:18,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:11:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-13 23:11:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:11:18,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:18,156 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:18,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:11:18,157 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1086743131, now seen corresponding path program 8 times [2020-10-13 23:11:18,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:18,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629974767] [2020-10-13 23:11:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:18,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:19,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:19,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:19,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:20,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:22,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4570 [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:11:22,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:23,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:23,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:23,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:23,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:23,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:23,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:11:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:23,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:11:23,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:23,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:23,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:11:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:23,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:11:23,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629974767] [2020-10-13 23:11:23,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:23,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:11:23,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993552346] [2020-10-13 23:11:23,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:11:23,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:11:23,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:11:23,362 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 23 states. [2020-10-13 23:11:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:25,348 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-13 23:11:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:11:25,349 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-10-13 23:11:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:25,352 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:11:25,352 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:11:25,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:11:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:11:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 74. [2020-10-13 23:11:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:11:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-13 23:11:25,368 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 48 [2020-10-13 23:11:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:25,369 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-13 23:11:25,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:11:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-13 23:11:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:11:25,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:25,370 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:25,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:11:25,370 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:25,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:25,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2071887182, now seen corresponding path program 9 times [2020-10-13 23:11:25,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:25,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887586059] [2020-10-13 23:11:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:25,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:25,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:25,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:11:25,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:25,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:25,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:25,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:25,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:25,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:25,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:25,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:25,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:25,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:25,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:25,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 23:11:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:25,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:25,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:25,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:25,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:25,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:25,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:25,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:25,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:25,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 23:11:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:25,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:25,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:25,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:25,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:11:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:25,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:25,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:25,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:25,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:25,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:25,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:25,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:11:25,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887586059] [2020-10-13 23:11:25,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:25,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:11:25,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852081196] [2020-10-13 23:11:25,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:11:25,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:11:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:11:25,598 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 12 states. [2020-10-13 23:11:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:25,796 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-13 23:11:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:11:25,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 23:11:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:25,798 INFO L225 Difference]: With dead ends: 91 [2020-10-13 23:11:25,798 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:11:25,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:11:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:11:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 23:11:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:11:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-13 23:11:25,816 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 50 [2020-10-13 23:11:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:25,817 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-13 23:11:25,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:11:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-13 23:11:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:11:25,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:25,818 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:25,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:11:25,818 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash -904206316, now seen corresponding path program 3 times [2020-10-13 23:11:25,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:25,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321696604] [2020-10-13 23:11:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:25,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:26,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:26,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:27,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:27,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:29,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:29,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:30,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:11:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:11:30,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:30,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:30,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:11:30,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:30,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 23:11:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:30,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:30,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:30,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:30,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:30,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:11:30,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:30,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:30,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:30,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:11:30,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:30,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:30,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:11:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:30,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:30,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:30,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:30,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:30,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:30,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:30,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:30,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:30,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:11:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:30,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:11:30,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321696604] [2020-10-13 23:11:30,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:30,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:11:30,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423562337] [2020-10-13 23:11:30,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:11:30,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:30,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:11:30,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:11:30,949 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 12 states. [2020-10-13 23:11:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:31,235 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2020-10-13 23:11:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:11:31,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 23:11:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:31,241 INFO L225 Difference]: With dead ends: 126 [2020-10-13 23:11:31,241 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:11:31,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:11:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:11:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 69. [2020-10-13 23:11:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:11:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-10-13 23:11:31,265 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 50 [2020-10-13 23:11:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:31,273 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-10-13 23:11:31,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:11:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-10-13 23:11:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:11:31,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:31,274 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:31,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:11:31,275 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:31,275 INFO L82 PathProgramCache]: Analyzing trace with hash -635117836, now seen corresponding path program 10 times [2020-10-13 23:11:31,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:31,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156974953] [2020-10-13 23:11:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:31,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:31,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:32,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:32,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:32,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:32,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:33,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:33,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:33,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:33,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:33,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:34,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:34,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:11:35,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 23:11:35,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4177 [2020-10-13 23:11:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:35,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:11:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:11:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:35,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:35,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:35,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:35,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:35,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:35,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:35,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:35,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:11:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:35,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:35,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:35,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:35,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:11:35,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:35,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:35,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:36,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:11:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:36,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:36,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:36,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:36,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:11:36,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:36,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:36,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:36,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:11:36,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156974953] [2020-10-13 23:11:36,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:36,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:11:36,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717175154] [2020-10-13 23:11:36,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:11:36,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:11:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:11:36,109 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 23 states. [2020-10-13 23:11:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:37,123 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-13 23:11:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:11:37,123 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 23:11:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:37,124 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:11:37,124 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:11:37,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:11:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:11:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-13 23:11:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:11:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-13 23:11:37,135 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 51 [2020-10-13 23:11:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:37,135 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-13 23:11:37,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:11:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-13 23:11:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:11:37,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:37,136 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:37,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:11:37,136 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1077099787, now seen corresponding path program 11 times [2020-10-13 23:11:37,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:37,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419876897] [2020-10-13 23:11:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:37,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:37,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:37,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:37,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:41,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:41,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:11:41,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:11:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4715 [2020-10-13 23:11:41,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:41,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:11:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:11:41,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:42,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:42,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:42,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:42,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:42,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:42,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:42,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 23:11:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:42,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:42,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:42,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:42,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:42,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:42,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:42,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:42,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:42,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:11:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:42,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:42,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:42,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:42,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:42,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:42,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:42,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:42,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:42,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:42,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:11:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:42,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:42,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:42,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:42,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:42,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:42,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:42,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:42,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:42,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 59 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:11:42,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419876897] [2020-10-13 23:11:42,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:42,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:11:42,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340299119] [2020-10-13 23:11:42,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:11:42,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:11:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:11:42,208 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 20 states. [2020-10-13 23:11:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:43,082 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-13 23:11:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:11:43,083 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-13 23:11:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:43,084 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:11:43,084 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:11:43,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:11:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:11:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2020-10-13 23:11:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:11:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-13 23:11:43,103 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 53 [2020-10-13 23:11:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:43,103 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-13 23:11:43,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:11:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-13 23:11:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:11:43,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:43,105 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:43,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:11:43,105 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:43,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1872214034, now seen corresponding path program 12 times [2020-10-13 23:11:43,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:43,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000609646] [2020-10-13 23:11:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:43,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:43,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:43,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:44,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:44,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:44,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:46,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:48,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:48,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:11:48,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:11:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:11:48,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:48,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:11:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:11:48,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:48,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:48,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:48,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:48,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:48,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:11:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:48,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:48,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:48,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:48,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:48,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:48,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:48,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:48,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:11:48,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:48,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:11:48,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:48,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:11:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:48,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:48,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:48,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:48,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:48,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:48,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:48,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:48,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:48,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:48,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:48,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:48,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 23:11:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:48,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:48,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:48,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:48,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:11:48,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000609646] [2020-10-13 23:11:48,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:48,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:11:48,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303839313] [2020-10-13 23:11:48,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:11:48,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:11:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:11:48,776 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 24 states. [2020-10-13 23:11:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:50,221 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-13 23:11:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:11:50,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-13 23:11:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:50,224 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:11:50,224 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:11:50,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=1695, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:11:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:11:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2020-10-13 23:11:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:11:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-13 23:11:50,239 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 56 [2020-10-13 23:11:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:50,239 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-13 23:11:50,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:11:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-13 23:11:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:11:50,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:50,240 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:50,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:11:50,241 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1918858325, now seen corresponding path program 13 times [2020-10-13 23:11:50,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:50,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576543379] [2020-10-13 23:11:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:50,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:50,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:52,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:52,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:52,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:11:55,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 23:11:55,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:11:55,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:11:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:11:55,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:55,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:55,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:55,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:55,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:55,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:55,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:55,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:11:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:55,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:55,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:55,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:11:55,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:55,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:55,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:55,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:11:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:55,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:55,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:55,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:55,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:11:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:55,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:55,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:55,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:55,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:55,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:55,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:55,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:55,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:55,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:55,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:11:55,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576543379] [2020-10-13 23:11:55,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:55,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:11:55,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132605342] [2020-10-13 23:11:55,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:11:55,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:55,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:11:55,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:11:55,994 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 24 states. [2020-10-13 23:11:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:57,108 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2020-10-13 23:11:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:11:57,109 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-13 23:11:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:57,110 INFO L225 Difference]: With dead ends: 132 [2020-10-13 23:11:57,110 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:11:57,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:11:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:11:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2020-10-13 23:11:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:11:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-10-13 23:11:57,128 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 59 [2020-10-13 23:11:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:57,128 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-10-13 23:11:57,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:11:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-10-13 23:11:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:11:57,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:57,129 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:57,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:11:57,130 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2023154370, now seen corresponding path program 14 times [2020-10-13 23:11:57,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:57,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557819590] [2020-10-13 23:11:57,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:57,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:11:57,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:57,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 23:11:57,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:57,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:57,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:11:57,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:57,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:11:57,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:57,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:57,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:57,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:57,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:57,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:57,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:57,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:57,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:57,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 23:11:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:57,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:57,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:57,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:57,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:57,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:57,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:57,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:57,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:57,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:57,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:11:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:57,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:57,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:57,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:57,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:57,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:57,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:11:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:57,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:57,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:57,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:57,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:57,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:57,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:57,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:57,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:57,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:57,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:11:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:57,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:11:57,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:57,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:57,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:57,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:57,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:11:57,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:57,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:11:57,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:11:57,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557819590] [2020-10-13 23:11:57,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:57,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:11:57,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194377879] [2020-10-13 23:11:57,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:11:57,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:57,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:11:57,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:11:57,422 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 14 states. [2020-10-13 23:11:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:57,694 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-10-13 23:11:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:11:57,694 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-13 23:11:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:57,696 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:11:57,696 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:11:57,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:11:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:11:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 23:11:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:11:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-13 23:11:57,716 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 61 [2020-10-13 23:11:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:57,716 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-13 23:11:57,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:11:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-13 23:11:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:11:57,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:57,717 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:57,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:11:57,717 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:57,718 INFO L82 PathProgramCache]: Analyzing trace with hash -684866012, now seen corresponding path program 4 times [2020-10-13 23:11:57,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:57,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975443363] [2020-10-13 23:11:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:57,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:59,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:12:02,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:12:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:12:02,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:12:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:12:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:12:02,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:02,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:02,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:02,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:12:02,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:02,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 23:12:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:02,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:02,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:02,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:02,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:02,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:02,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:12:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:02,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:02,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:02,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:02,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:02,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:02,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:02,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:02,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:12:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:02,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:02,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:02,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:02,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:02,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:02,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:12:02,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975443363] [2020-10-13 23:12:02,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:02,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:12:02,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676605686] [2020-10-13 23:12:02,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:12:02,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:02,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:12:02,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:12:02,876 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 13 states. [2020-10-13 23:12:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:03,189 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2020-10-13 23:12:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:12:03,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-13 23:12:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:03,192 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:12:03,192 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:12:03,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:12:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:12:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2020-10-13 23:12:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:12:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-10-13 23:12:03,208 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 61 [2020-10-13 23:12:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:03,208 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-10-13 23:12:03,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:12:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-10-13 23:12:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:12:03,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:03,209 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:03,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:12:03,209 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1295489678, now seen corresponding path program 15 times [2020-10-13 23:12:03,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:03,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153534269] [2020-10-13 23:12:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:03,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:03,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:05,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:05,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:06,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:06,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:06,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:07,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:07,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:07,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:07,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:07,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:08,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:08,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:08,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:12:08,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 23:12:08,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:12:08,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:08,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:12:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:12:08,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:10,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:10,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:10,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:10,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:12:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:10,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:12:10,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:10,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:10,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:10,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:12:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:10,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:10,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:10,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:10,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:12:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:10,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:10,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 125 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:12:10,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153534269] [2020-10-13 23:12:10,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:10,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:12:10,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460824186] [2020-10-13 23:12:10,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:12:10,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:10,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:12:10,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:12:10,249 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 28 states. [2020-10-13 23:12:11,239 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-13 23:12:11,929 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-13 23:12:12,468 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-13 23:12:12,807 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-13 23:12:14,271 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-13 23:12:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:14,849 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-13 23:12:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:12:14,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-13 23:12:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:14,851 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:12:14,851 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:12:14,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=278, Invalid=3144, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 23:12:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:12:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2020-10-13 23:12:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:12:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2020-10-13 23:12:14,874 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 62 [2020-10-13 23:12:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:14,875 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2020-10-13 23:12:14,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:12:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2020-10-13 23:12:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:12:14,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:14,876 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:14,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:12:14,876 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:14,877 INFO L82 PathProgramCache]: Analyzing trace with hash -214997303, now seen corresponding path program 16 times [2020-10-13 23:12:14,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:14,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111322211] [2020-10-13 23:12:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:14,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:15,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:18,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:19,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:19,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:12:19,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:12:19,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:12:19,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:19,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:19,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:12:19,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:19,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:12:19,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:12:20,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:20,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:20,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:20,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:20,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:20,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:20,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:20,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:20,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:12:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:20,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:20,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:20,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:12:20,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:20,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:20,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:20,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:12:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:20,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:20,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:20,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:20,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:20,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:20,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:20,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:20,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 23:12:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:20,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:20,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:20,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:20,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:20,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:20,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:20,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:12:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:20,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:20,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:20,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:20,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:20,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:20,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:20,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:20,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:20,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:20,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:20,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 7 proven. 99 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:12:20,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111322211] [2020-10-13 23:12:20,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:20,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:12:20,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771703822] [2020-10-13 23:12:20,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:12:20,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:12:20,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:12:20,679 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 25 states. [2020-10-13 23:12:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:22,361 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2020-10-13 23:12:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:12:22,362 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-13 23:12:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:22,365 INFO L225 Difference]: With dead ends: 133 [2020-10-13 23:12:22,366 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:12:22,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=1576, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:12:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:12:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2020-10-13 23:12:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 23:12:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2020-10-13 23:12:22,395 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 64 [2020-10-13 23:12:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:22,396 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2020-10-13 23:12:22,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:12:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2020-10-13 23:12:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:12:22,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:22,397 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:22,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:12:22,397 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1371949611, now seen corresponding path program 5 times [2020-10-13 23:12:22,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:22,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366432007] [2020-10-13 23:12:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:22,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:22,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:22,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:22,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:23,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:23,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:23,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:23,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:26,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:26,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:26,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:27,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:27,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:27,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:12:27,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 23:12:27,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:12:27,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:27,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:12:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:12:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:12:27,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:27,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:27,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:27,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:27,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:27,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:12:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:27,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:12:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:27,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:27,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:27,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:27,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:27,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:27,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:27,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 23:12:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:27,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:27,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:27,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:27,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:27,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:27,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:27,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:27,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:27,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:27,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:27,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:27,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:12:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:27,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:27,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:27,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:27,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:12:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:27,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:12:27,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366432007] [2020-10-13 23:12:27,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:27,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:12:27,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80066854] [2020-10-13 23:12:27,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:12:27,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:12:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:12:27,556 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 14 states. [2020-10-13 23:12:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:27,947 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2020-10-13 23:12:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:12:27,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-13 23:12:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:27,949 INFO L225 Difference]: With dead ends: 187 [2020-10-13 23:12:27,949 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:12:27,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:12:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:12:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2020-10-13 23:12:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:12:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2020-10-13 23:12:27,973 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 64 [2020-10-13 23:12:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:27,974 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2020-10-13 23:12:27,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:12:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2020-10-13 23:12:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:12:27,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:27,975 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:27,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:12:27,975 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1958714805, now seen corresponding path program 17 times [2020-10-13 23:12:27,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:27,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188570165] [2020-10-13 23:12:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:27,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:28,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:28,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:28,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:28,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:29,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:30,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:31,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:32,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:32,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:32,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:12:32,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:12:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:12:32,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:32,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:12:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 23:12:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:33,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:33,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:33,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:33,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:33,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:33,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:33,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:33,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:33,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:33,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:33,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:33,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:33,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:12:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:33,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:33,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:33,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:33,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:33,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:12:33,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:33,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:33,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:33,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:12:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:33,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:33,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:33,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:33,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:33,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:12:33,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:33,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:33,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:12:33,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:12:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:33,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:33,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:33,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:33,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:33,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:33,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:33,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:33,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:33,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:33,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:33,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 139 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:12:33,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188570165] [2020-10-13 23:12:33,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:33,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:12:33,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064807120] [2020-10-13 23:12:33,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:12:33,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:33,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:12:33,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:12:33,955 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand 26 states. [2020-10-13 23:12:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:35,907 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-13 23:12:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:12:35,908 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 65 [2020-10-13 23:12:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:35,909 INFO L225 Difference]: With dead ends: 141 [2020-10-13 23:12:35,909 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:12:35,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=2340, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:12:35,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:12:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2020-10-13 23:12:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:12:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-10-13 23:12:35,936 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 65 [2020-10-13 23:12:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:35,936 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-10-13 23:12:35,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:12:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-10-13 23:12:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:12:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:35,938 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:35,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:12:35,939 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1919184542, now seen corresponding path program 18 times [2020-10-13 23:12:35,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:35,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120198707] [2020-10-13 23:12:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:35,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:36,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:38,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:40,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:40,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:12:40,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:12:40,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:12:40,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:40,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:40,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:12:40,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:40,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:12:40,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:41,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:41,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:41,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:41,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:41,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:41,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:41,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:41,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:41,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:41,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:12:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:41,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:41,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:41,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:41,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:41,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:41,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:41,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:41,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:12:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:41,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:41,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:41,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:41,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:41,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:12:41,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:41,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:41,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:12:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:41,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:41,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:41,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:41,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:12:41,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:41,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:41,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:41,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:41,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:41,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:41,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:12:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:41,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:41,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:41,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:41,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:41,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:41,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:41,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:41,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:41,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 10 proven. 116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:12:41,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120198707] [2020-10-13 23:12:41,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:41,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:12:41,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981618081] [2020-10-13 23:12:41,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:12:41,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:41,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:12:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:12:41,912 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 26 states. [2020-10-13 23:12:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:44,058 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-10-13 23:12:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:12:44,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-10-13 23:12:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:44,060 INFO L225 Difference]: With dead ends: 136 [2020-10-13 23:12:44,060 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 23:12:44,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=265, Invalid=2815, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 23:12:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 23:12:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2020-10-13 23:12:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:12:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-10-13 23:12:44,092 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 67 [2020-10-13 23:12:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:44,093 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-10-13 23:12:44,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:12:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-10-13 23:12:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:12:44,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:44,096 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:44,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:12:44,097 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash -552815575, now seen corresponding path program 19 times [2020-10-13 23:12:44,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:44,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577825799] [2020-10-13 23:12:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:44,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:44,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:44,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:44,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:44,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:44,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:45,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:45,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:46,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:46,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:47,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:48,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:48,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:12:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:49,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:12:49,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:50,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:50,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:50,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:50,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:50,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:50,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:50,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:50,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:50,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:12:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:50,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:50,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:50,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:50,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:50,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:50,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:50,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:50,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:50,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:12:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:50,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:50,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:50,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:50,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:50,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:50,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:50,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:50,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:50,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:50,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:50,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:12:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:50,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:50,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:50,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:50,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:12:50,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:50,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:50,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:12:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:12:50,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:50,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:12:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:50,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:50,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:50,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:50,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:50,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:50,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:50,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:50,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 13 proven. 136 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:12:50,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577825799] [2020-10-13 23:12:50,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:50,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:12:50,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958025299] [2020-10-13 23:12:50,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:12:50,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:50,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:12:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:12:50,269 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 28 states. [2020-10-13 23:12:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:54,361 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2020-10-13 23:12:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 23:12:54,361 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-10-13 23:12:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:54,363 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:12:54,363 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:12:54,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=483, Invalid=4919, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 23:12:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:12:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 110. [2020-10-13 23:12:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:12:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-10-13 23:12:54,394 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 70 [2020-10-13 23:12:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:54,394 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-10-13 23:12:54,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:12:54,395 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-10-13 23:12:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:12:54,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:54,396 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:54,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:12:54,396 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:54,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1881435776, now seen corresponding path program 20 times [2020-10-13 23:12:54,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:54,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402917556] [2020-10-13 23:12:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:54,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:54,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:12:54,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:54,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-13 23:12:54,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:54,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:12:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 23:12:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:54,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:54,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:54,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:54,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:54,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:54,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:54,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:54,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:54,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:54,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:54,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:54,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:12:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:54,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:54,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:54,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:54,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:54,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:54,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:54,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 23:12:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:54,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:54,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:54,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:54,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:54,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:54,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:54,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 23:12:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:54,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:54,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:54,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:54,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:54,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:54,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:54,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:54,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:54,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:54,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:54,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:12:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:54,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:54,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:54,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:54,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:54,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:54,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:54,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:54,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 23:12:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:54,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:54,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:54,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:12:54,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:54,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:12:54,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:54,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:12:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:54,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:12:54,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 60 proven. 57 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 23:12:54,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402917556] [2020-10-13 23:12:54,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:54,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:12:54,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769909066] [2020-10-13 23:12:54,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:12:54,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:12:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:12:54,793 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 16 states. [2020-10-13 23:12:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:55,171 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2020-10-13 23:12:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:12:55,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 23:12:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:55,173 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:12:55,174 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:12:55,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:12:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:12:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-13 23:12:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:12:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2020-10-13 23:12:55,201 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 72 [2020-10-13 23:12:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:55,202 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2020-10-13 23:12:55,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:12:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2020-10-13 23:12:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:12:55,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:55,203 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:55,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:12:55,203 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1540016130, now seen corresponding path program 21 times [2020-10-13 23:12:55,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:55,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563158561] [2020-10-13 23:12:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:55,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:55,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:55,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:56,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:56,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:57,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:57,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:57,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:58,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:59,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:59,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:00,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:13:00,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:01,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:01,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:01,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:01,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:01,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:01,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:01,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:01,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:01,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:01,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:13:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:01,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:01,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:01,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:01,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:01,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:01,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:01,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:13:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:01,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:01,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:01,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:01,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:01,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:01,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:01,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:01,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:01,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:01,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:13:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:01,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:01,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:01,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:01,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:01,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:01,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:01,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:01,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:01,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:13:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:01,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:01,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:01,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:01,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:01,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:01,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:01,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:01,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:01,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:01,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 13 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:13:01,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563158561] [2020-10-13 23:13:01,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:01,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:13:01,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114246672] [2020-10-13 23:13:01,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:13:01,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:01,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:13:01,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:13:01,682 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand 29 states. [2020-10-13 23:13:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:07,354 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2020-10-13 23:13:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 23:13:07,355 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 73 [2020-10-13 23:13:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:07,356 INFO L225 Difference]: With dead ends: 163 [2020-10-13 23:13:07,356 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 23:13:07,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=488, Invalid=4914, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 23:13:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 23:13:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 111. [2020-10-13 23:13:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 23:13:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2020-10-13 23:13:07,396 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 73 [2020-10-13 23:13:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:07,396 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2020-10-13 23:13:07,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:13:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2020-10-13 23:13:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:13:07,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:07,397 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:07,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:13:07,398 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:07,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:07,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1246957543, now seen corresponding path program 22 times [2020-10-13 23:13:07,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:07,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529729642] [2020-10-13 23:13:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:07,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:07,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:10,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:12,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 23:13:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:13,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:13,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:13,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:13:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:13,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:13,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:13,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:13,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:13,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:13,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:13,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:13:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:13,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:13,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:13,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:13,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:13:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:13,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:13,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:13,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:13,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:13,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:13,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:13,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:13:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:13,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:13,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:13,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:13,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:13,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:13,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:13,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:13,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:13,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:13:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:13,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:13,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:13,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:13,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:13,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:13,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:13,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:13,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:13,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:13,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:13,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 140 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:13:13,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529729642] [2020-10-13 23:13:13,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:13,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:13:13,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554996682] [2020-10-13 23:13:13,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:13:13,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:13,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:13:13,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=751, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:13:13,304 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 29 states. [2020-10-13 23:13:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:15,268 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2020-10-13 23:13:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:13:15,269 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 75 [2020-10-13 23:13:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:15,273 INFO L225 Difference]: With dead ends: 131 [2020-10-13 23:13:15,274 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:13:15,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=176, Invalid=2176, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 23:13:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:13:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2020-10-13 23:13:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 23:13:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2020-10-13 23:13:15,302 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 75 [2020-10-13 23:13:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:15,302 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2020-10-13 23:13:15,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:13:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2020-10-13 23:13:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:13:15,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:15,304 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:15,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:13:15,304 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1897705093, now seen corresponding path program 6 times [2020-10-13 23:13:15,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:15,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251073882] [2020-10-13 23:13:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:15,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:15,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:17,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:17,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:19,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:19,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:20,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:20,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:13:20,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:13:20,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:13:20,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:20,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:20,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:13:20,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:13:20,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:13:20,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:20,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:20,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:20,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:20,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:20,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:20,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:20,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:20,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:13:20,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:20,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:13:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:20,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:20,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:20,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:20,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:20,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:20,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:20,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:20,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:20,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:13:20,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:20,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:13:20,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:13:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:20,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:20,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:20,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:20,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:20,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:20,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:20,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:13:20,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:20,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:20,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:13:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:20,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:20,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:20,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:20,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:20,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:20,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:13:20,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:13:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:13:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:20,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:20,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:20,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:20,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:20,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:20,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:13:20,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:20,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 8 proven. 145 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 23:13:20,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251073882] [2020-10-13 23:13:20,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:20,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:13:20,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479957686] [2020-10-13 23:13:20,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:13:20,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:20,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:13:20,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:13:20,571 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 15 states. [2020-10-13 23:13:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:21,045 INFO L93 Difference]: Finished difference Result 220 states and 251 transitions. [2020-10-13 23:13:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:13:21,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-13 23:13:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:21,048 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:13:21,048 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 23:13:21,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:13:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 23:13:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 125. [2020-10-13 23:13:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 23:13:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2020-10-13 23:13:21,078 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 75 [2020-10-13 23:13:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:21,078 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2020-10-13 23:13:21,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:13:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2020-10-13 23:13:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:13:21,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:21,079 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:21,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:13:21,080 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:21,080 INFO L82 PathProgramCache]: Analyzing trace with hash -950896247, now seen corresponding path program 23 times [2020-10-13 23:13:21,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:21,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957431183] [2020-10-13 23:13:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:21,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:22,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:22,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:22,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:22,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:23,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:24,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:26,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:26,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:13:26,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:13:26,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 23:13:26,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:26,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:13:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:13:26,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:27,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:27,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:27,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:27,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:27,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:27,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:27,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:27,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:13:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:27,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:27,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:27,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:27,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:27,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:27,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:27,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:27,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:27,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:27,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:27,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:13:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:27,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:27,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:27,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:27,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:13:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:27,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:27,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:27,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:27,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:27,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:27,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:27,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:27,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:13:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:27,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:27,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:27,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 10 proven. 194 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:13:27,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957431183] [2020-10-13 23:13:27,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:27,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:13:27,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167840103] [2020-10-13 23:13:27,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:13:27,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:27,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:13:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:13:27,703 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 33 states. [2020-10-13 23:13:31,795 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 23:13:32,139 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 23:13:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:33,591 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2020-10-13 23:13:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 23:13:33,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-13 23:13:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:33,594 INFO L225 Difference]: With dead ends: 172 [2020-10-13 23:13:33,594 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:13:33,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=545, Invalid=4011, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 23:13:33,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:13:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 118. [2020-10-13 23:13:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:13:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-10-13 23:13:33,632 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 76 [2020-10-13 23:13:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:33,633 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-10-13 23:13:33,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:13:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-10-13 23:13:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:13:33,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:33,634 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:33,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:13:33,635 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1577999328, now seen corresponding path program 24 times [2020-10-13 23:13:33,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:33,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728291608] [2020-10-13 23:13:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:34,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:34,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:34,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:34,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:34,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:36,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:37,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:38,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:38,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 23:13:38,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:39,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:39,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:39,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:39,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:39,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:39,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:39,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:39,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:39,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:39,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:13:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:39,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:39,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:39,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:39,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:39,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:39,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:39,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:39,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:13:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:39,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:39,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:39,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:39,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:39,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:39,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:39,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:39,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:39,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:39,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:39,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:13:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:39,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:39,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:39,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:13:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:39,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:39,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:39,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:39,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:39,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:39,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:39,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:13:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:39,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:39,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:39,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:39,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 9 proven. 163 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:13:39,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728291608] [2020-10-13 23:13:39,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:39,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:13:39,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882308613] [2020-10-13 23:13:39,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:13:39,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:39,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:13:39,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:13:39,686 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 31 states. [2020-10-13 23:13:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:43,293 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2020-10-13 23:13:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 23:13:43,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2020-10-13 23:13:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:43,294 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:13:43,295 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:13:43,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=315, Invalid=3975, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 23:13:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:13:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 133. [2020-10-13 23:13:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:13:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2020-10-13 23:13:43,343 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 78 [2020-10-13 23:13:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:43,343 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2020-10-13 23:13:43,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:13:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2020-10-13 23:13:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:13:43,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:43,345 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:43,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:13:43,345 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:43,346 INFO L82 PathProgramCache]: Analyzing trace with hash -16021831, now seen corresponding path program 25 times [2020-10-13 23:13:43,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:43,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882272236] [2020-10-13 23:13:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:43,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:43,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:43,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:44,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:44,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:44,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:46,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:46,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:46,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:46,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:47,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:47,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:48,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:48,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 23:13:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:49,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:49,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:13:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:49,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:49,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:49,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:49,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:13:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:49,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:49,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:49,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:49,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:49,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:13:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:49,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:49,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:13:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:13:49,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:13:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:49,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:13:49,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:49,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:49,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:49,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 23:13:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:49,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:49,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 183 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:13:49,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882272236] [2020-10-13 23:13:49,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:49,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:13:49,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262145164] [2020-10-13 23:13:49,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:13:49,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:13:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:13:49,824 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 31 states. [2020-10-13 23:13:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:55,551 INFO L93 Difference]: Finished difference Result 188 states and 212 transitions. [2020-10-13 23:13:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 23:13:55,551 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-10-13 23:13:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:55,552 INFO L225 Difference]: With dead ends: 188 [2020-10-13 23:13:55,552 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 23:13:55,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=602, Invalid=6040, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 23:13:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 23:13:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 133. [2020-10-13 23:13:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:13:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2020-10-13 23:13:55,596 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 81 [2020-10-13 23:13:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:55,597 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2020-10-13 23:13:55,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:13:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2020-10-13 23:13:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:13:55,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:55,598 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:55,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:13:55,598 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1517004752, now seen corresponding path program 26 times [2020-10-13 23:13:55,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:55,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538365263] [2020-10-13 23:13:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:13:55,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-13 23:13:55,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:13:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:13:55,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:56,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:13:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:56,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:56,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:56,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:56,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:56,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:13:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:56,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:56,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:56,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:56,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:56,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:56,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:13:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:13:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:56,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:56,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:56,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:56,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:56,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:56,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:56,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:56,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:56,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:13:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 23:13:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:56,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:13:56,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:56,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:56,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:13:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:13:56,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 84 proven. 77 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 23:13:56,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538365263] [2020-10-13 23:13:56,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:56,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:13:56,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397094059] [2020-10-13 23:13:56,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:13:56,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:56,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:13:56,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:13:56,126 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 18 states. [2020-10-13 23:13:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:56,631 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-10-13 23:13:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:13:56,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-13 23:13:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:56,634 INFO L225 Difference]: With dead ends: 154 [2020-10-13 23:13:56,634 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:13:56,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:13:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:13:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-13 23:13:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:13:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-10-13 23:13:56,671 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 83 [2020-10-13 23:13:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:56,671 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-10-13 23:13:56,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:13:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-10-13 23:13:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:13:56,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:56,673 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:56,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:13:56,673 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:56,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1953022272, now seen corresponding path program 27 times [2020-10-13 23:13:56,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:56,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199983896] [2020-10-13 23:13:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:58,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:59,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:59,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:59,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:01,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:01,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 23:14:01,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:14:01,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:14:01,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:01,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:14:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 23:14:01,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:03,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:03,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:03,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:03,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:03,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:03,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:03,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:03,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:03,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:03,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:14:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:03,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:03,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:03,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:03,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:03,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:03,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:03,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:03,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:03,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:03,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:03,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:03,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:14:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:03,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:03,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:03,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:03,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:14:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:03,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:03,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:14:03,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:03,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:14:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:03,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:03,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:03,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:03,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 23:14:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:03,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:03,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:03,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:03,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:03,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:03,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:03,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:03,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:03,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:03,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:03,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 15 proven. 212 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:14:03,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199983896] [2020-10-13 23:14:03,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:03,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:14:03,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405485840] [2020-10-13 23:14:03,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:14:03,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:03,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:14:03,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:14:03,573 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 33 states. [2020-10-13 23:14:08,369 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-13 23:14:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:11,112 INFO L93 Difference]: Finished difference Result 185 states and 210 transitions. [2020-10-13 23:14:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-13 23:14:11,112 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 84 [2020-10-13 23:14:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:11,113 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:14:11,113 INFO L226 Difference]: Without dead ends: 183 [2020-10-13 23:14:11,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=542, Invalid=6430, Unknown=0, NotChecked=0, Total=6972 [2020-10-13 23:14:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-13 23:14:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2020-10-13 23:14:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:14:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-10-13 23:14:11,147 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 84 [2020-10-13 23:14:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:11,147 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-10-13 23:14:11,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:14:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-10-13 23:14:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:14:11,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:11,149 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:11,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:14:11,149 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:11,150 INFO L82 PathProgramCache]: Analyzing trace with hash -312189801, now seen corresponding path program 28 times [2020-10-13 23:14:11,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:11,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465804858] [2020-10-13 23:14:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:11,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:11,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:11,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:11,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:16,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:16,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 23:14:16,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:14:16,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:14:16,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:16,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:14:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 23:14:16,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:17,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:17,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:17,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:17,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:17,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:17,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 23:14:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:17,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:17,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:17,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:17,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:17,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:17,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:17,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:14:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:17,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:17,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:17,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:17,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:17,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:17,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:17,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:17,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:17,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:14:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:17,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:17,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:17,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:17,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:17,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:17,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:14:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:17,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:17,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:17,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:14:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:17,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:17,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:17,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:17,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 23:14:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:14:17,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 172 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 23:14:17,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465804858] [2020-10-13 23:14:17,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:17,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:14:17,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725994069] [2020-10-13 23:14:17,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:14:17,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:14:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:14:17,083 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 28 states. [2020-10-13 23:14:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:18,953 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2020-10-13 23:14:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:14:18,955 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-10-13 23:14:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:18,958 INFO L225 Difference]: With dead ends: 154 [2020-10-13 23:14:18,959 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:14:18,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:14:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:14:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2020-10-13 23:14:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 23:14:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2020-10-13 23:14:18,999 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 86 [2020-10-13 23:14:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:18,999 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2020-10-13 23:14:18,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:14:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2020-10-13 23:14:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:14:19,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:19,000 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:19,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:14:19,000 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash -522437639, now seen corresponding path program 7 times [2020-10-13 23:14:19,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:19,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740786964] [2020-10-13 23:14:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:19,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:19,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:19,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:24,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:14:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:24,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:24,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:14:24,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:24,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:14:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:24,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:24,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:24,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:14:24,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:24,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:14:24,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:24,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:14:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:24,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:24,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:24,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:24,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:14:24,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:24,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:14:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:24,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:24,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:14:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:24,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:24,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:24,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:14:24,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:24,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:14:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:24,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:24,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:14:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:24,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:24,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:24,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:24,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:14:24,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:24,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:14:24,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:24,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:24,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 23:14:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:24,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:24,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:14:24,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:24,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 10 proven. 176 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 23:14:24,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740786964] [2020-10-13 23:14:24,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:24,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:14:24,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20685424] [2020-10-13 23:14:24,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:14:24,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:14:24,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:14:24,270 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand 16 states. [2020-10-13 23:14:24,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:24,974 INFO L93 Difference]: Finished difference Result 255 states and 290 transitions. [2020-10-13 23:14:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:14:24,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-13 23:14:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:24,977 INFO L225 Difference]: With dead ends: 255 [2020-10-13 23:14:24,977 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 23:14:24,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:14:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 23:14:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 148. [2020-10-13 23:14:25,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:14:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 165 transitions. [2020-10-13 23:14:25,019 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 165 transitions. Word has length 86 [2020-10-13 23:14:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:25,020 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 165 transitions. [2020-10-13 23:14:25,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:14:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 165 transitions. [2020-10-13 23:14:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:14:25,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:25,021 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:25,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:14:25,021 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1082565977, now seen corresponding path program 29 times [2020-10-13 23:14:25,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:25,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896725710] [2020-10-13 23:14:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:25,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:25,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:25,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:26,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:26,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:27,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:27,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking...